Shimano XT Di2 M8050 Mountain Bike Groupset Is Here w/ Wireless debut for all Di2!

Shimano XT Di2 groupset

Similar to how Shimano Di2 trickled down on the road, it now brings electronic shifting down to the a more affordable level for your mountain bike. And, just as Ultegra Di2 ushered in the new E-Tube and other technologies that improved upon the original, so too does the new XT Di2 M8050 groupset which brings a host of impressive new tech and features to their battery powered groups.

Shimano’s road product manager Dave Lawrence,  was on hand to describe how the new XT Di2 will improve the entire Di2 family. “We looked at electronic shifting and how that would change the ride experience. What we found was we could offer incredibly precise shifting. And the ergonomics were fantastic, too. Then we moved it into triathlon, but when we started using it in cyclocross is when it really took off. You had this precise shifting in the worst possible conditions.”

From there, it trickled down to Ultegra and a switch to their plug-and-play E-tube connections. That made remote shifters possible and really brought electronic shifting to the masses. Also the Dura Ace version put their electronic shifting below the weight of a mechanical group for the first time. All of these improvements then trickled down again to Ultegra, and then they took Di2 to their Alfine, Nexus and Steps pavement groups.

XT Di2

From there, it all combined to create the first digital mountain bike system, XTR Di2. And why did they do that?

“Di2 leaves behind some of the restrictions imposed by mechanical systems,” added Matt Robertson, Shimano’s mountain bike product manager. “Things like using cables to pull something and how to route the cables to make it work correctly. And it opened up new opportunities to combine shift and suspension functions operating off the same battery. Di2 improves rider momentum and efficiency, and it allows the drivetrain to react at the speed that you are reacting to your surroundings. Rider input leads to instant reaction from the bike. In short, Di2 lets people build a better mountain bike.”

That’s all well and good, but XTR Di2’s price put it outside the realm of most enthusiasts. The new XT Di2 will be more accessible, with a complete group price starting around $1,368 for a 1×11 setup, including brakes. It’ll also have better ergonomics, and it introduces all new wireless setup and data transmission features.

Shimano XT Di2 SW-M8050-R trigger shifter

XT Di2 still gets the independent adjustment of each button’s extension toward the grip. The bottom pad is a little larger than XTR, and the top pad is a little longer, making them easier to hit. XT’s button pads are also flatter, and felt much better. Two cost saving measures were limiting the number of clicks and using steel rather than titanium. XT’s levers have a single-click rather than XTR’s two-click design. They found that it simplified it a bit, and with Multi-Shift, the second click wasn’t as necessary as most riders quickly learned how long they needed to hold a lever down to shift a specific number of cogs.

Shimano XT Di2 RD-M8050 Rear Derailleur

The M8050 rear derailleur is Direct Mount compatible. Materials make up much of the rest of the cost savings. Functionally the units are the same as XTR Di2, and parts are interchangeable between the groups. In fact, while folks have been doing it for a while, Shimano’s finally starting to talk about using road Di2 drop bar shifters with mountain Di2 derailleurs (or vice versa). There were lots of NAHBS bikes doing just that, but until very recently, Shimano hasn’t really endorsed or even discussed such mashups. You’ll still need to use both front and rear mountain or front and rear road derailleurs, you can’t mix one from road and mountain on the same bike.



Shimano XT FC-M8000 1x11 crankset 2016


Non electrical groupset parts (cranks, brakes, cassette, chain, and pedals) all carry over from the recently updated XT 8000. They offer an 11-46 cassette for 1×11 systems, and either 11-40 or 11-42 cassettes for 2×11 systems. The chainrings carry over, too, but a new +/- tooth profile is coming soon, which is basically their version of a narrow wide.


Perhaps the biggest news to come out of the XT Di2 introduction is their new dual-band Bluetooth and ANT communication. Bluetooth compatibility now lets you set up, tune and change the shifting and functions with your smartphone or tablet. Available for iOS and Android, the E-tube app will let you customize and update the system on both smartphone and tablet, and the tablet app adds Error Check and Preset programs. Those last two are aimed more at bike shops than riders, but they’re there for all to use. You can also still do it with their E-tube PC software, too.

That dual transmitter will be built into the XT system information display, and a new dual transmission D-Fly that’ll add wireless updates to both road and mountain bike groups. XTR will soon get a new display, too.

The ANT signal is ANT Private, not ANT+, meaning it’s transmitting a closed protocol that carries gear data directly to an approved third party cycling computer (Garmin, Magellan, Wahoo and Pioneer are partners so far). So, you could choose to have a compatible computer show you that data if you choose not to use the Di2 display (or you’re using it on a road group that has no display).


Shimano XT di2 electronic wireless shifting

The trick to making all of that communication work is that you’ll also need either the new BT-DN110 battery or BM-DN100 battery mount. Both contain the brains that allow those smart functions that make the wireless display work. So if you wanted to add wireless function to an existing XTR group, you’ll need to upgrade to either the new battery or new battery mount. The new battery will replace the original battery, so going forward you should see OEM spec using the new one.

A new battery was necessary because they couldn’t fit any more memory into the original E-tube unit. As electronics continue to shrink, they could fit the necessary transistors and what not into the same size package to add functionality while maintaining the same level of battery power. So, the new battery is the same size as the old one, it just does more.

To recap, all of that new wireless communication will soon be available on all Di2 groups, road and mountain. Now that we’ve covered the new wireless setup, let’s jump back to the shifters. The XT shifters, through the app, can be set to control a Fox iCTD-equipped fork and/or shock.  So, using Shimano’s Synchro-Shift to automatically shift the front derailleur as you move up and down the cassette means you can use the left hand shifter to cycle through Open, Medium and Firm settings on your suspension. Or, what we think would be cool, is you could set the larger, lower thumb paddles to do downshifts on the left and upshifts on the right, then program the smaller top paddles to cycle the suspension settings.

The app will make it all incredibly easy thanks to a graphical interface and check box settings. Very cool, and very user friendly.


xt di2 pricesXT Di2 weight list


Sram X01 Eagle 12s Chain

Sram X01 Eagle 12speed Chain


Sram X01 Eagle 12s Chain

USD: $60
Euro: €66
Euro MSRP includes VAT

Actual weight: 260g


It might look normal from the outside, but it’s the Eagle engineering inside this incredible new design that makes possible a gear range previously found only in 2-ring drivetrains. And Sram’s biggest contributor to the 12-speed drivetrain’s ultra-smooth, precise, durable and quiet performance. The X01 links have a smooth radius, with no sharp edges or chamfers, which yield a significant reduction in noise, friction and wear on rings and cassette cogs. This design also allows for a flatter plate, which means more consistent chain riveting and greater overall strength. HARD CHROME™ technology extends the optimal performance life.

  • Groundbreaking SRAM design and technology.
  • It’s has been completely re-engineered,and is produced with new manufacturing technology.
  • All-new PowerLock connector with FLOW LINK technology provides better guiding and increased longevity.
  • Unique features and design also provide significantly improved wear resistance on the 12s cassettes and rings.

0% Off $60.00




Chain Specs

COMPATIBLE GEARS Eagle 10-50t cassette only
INNER PLATE Chrome plated
PIN TREATMENT Chrome hardened
OTHER Length – 126 links


SRAM XX1 Eagle 12-speed Chain – 2017

SRAM XX1 Eagle 12-speed Chain - black


SRAM XX1 Eagle 12-speed Chain

USD: $80 – $85
Euro: €88 – €92
Euro MSRP includes VAT

Actual weight: 260g


It might look normal from the outside, but the engineering inside this incredible new chain design that makes possible a gear range previously found only in 2-chainring drivetrains. And it’s also the biggest contributor to the Eagle™ drivetrain’s ultra-smooth, precise, durable and quiet performance. The Eagle™ chain’s links have a smooth radius, with no sharp edges or chamfers, which yield a significant reduction in noise, friction and wear on chainrings and cassette cogs. This design also allows for a flatter plate, which means more consistent chain riveting and greater overall strength. HARD CHROME™ technology extends the chain’s optimal performance life, and a Titanium Nitride coating on the Gold and Black models decreases corrosion and further reduces friction.

  • SRAM’s groundbreaking new chain design and technology.
  • The Eagle™ chain has been completely re-engineered, and is produced with new manufacturing technology.
  • All-new Eagle™ PowerLock® connector with FLOWLINK™ technology provides better guiding and increased longevity.
  • The XX1 Eagle™ chain is the quietest, strongest and most wear-resistant chain in the world.
  • Unique features and design also provide significantly improved wear resistance on Eagle™ cassettes and rings.

SRAM XX1 Eagle 12-speed Chain - 2017 gold



Purchase at Jensonusa




Specifications for XX1 Eagle

COMPATIBLE GEARS Eagle™ 10-50t cassette only
CLOSING LINK Eagle™ PowerLock® PVD
OUTER PLATE Nickel + PVD Gold or Black
INNER PLATE Chrome Plated + PVD Gold or Black
PIN TREATMENT Chrome hardened, Hollow Pin™
OTHER AM: Chain length – 126 links, OE: Chain length – 108 links, 110 links, 112 links, 114 links, 116 links, 118 links, 120 links,122 links, 124 links, 126 links
COLORS Silver, Black, Gold

Sram XX1 Stealth Black With Carbon Crank Boots


Sram XX1 Stealth Black 11-speed cranks

Since black is the new black, SRAM has gone stealth with the XX1 Black group. Formerly only available with bright red logos, and a few other colors as OEM options for complete bike makers, the new group color is set to make it look better no matter what color frame or anodized Chris King headset you choose for your ultra high-end ride.

Also incorporating the new X-SYNC Direct Mount Chainring, the XX1 stealth group brings the newest of what SRAM has to offer, along with some nice new accessory additions. Take a look inside to see the other components and new small parts…

Sram XX1 Stealth Black trigger shifter

There are no mechanical changes (aside from using a different existing chainring on the crank) to any of the XX1 group’s parts, it is still the industry-leading 1×11 pioneer that has changed so many of our rides for the better.

Sram XX1 Stealth Black 1x11 derailleur

The XX1 group consists of an XX1 Crankset with X-SYNC Direct Mount Chainring ($456 for GXP, $488 for BB30), XX1 Rear Derailleur ($326), XX1 Trigger Shifter ($183), XG-1199 X-Dome Cassette  and PC-XX1 Chain. The cassette and the chain are the only items not getting any cosmetic treatment, as their siblings in the X01 family area already blacked out, and the distinctive champagne finish of the cassette is both a performance and visual difference for the higher-end cassette.


SRAM did not release new pricing on the chain and cassette since they are unchanged from the original XX1 group. The cassette retails for $425 and the chain for $63.


1×11 is completely changing the industry, and even allowing some bike manufacturers to be more creative with frame design being only compatible with a single front chainring. However, most manufacturers are still insuring the most choice for their customers, and designing bikes with front derailleurs in mind. If you have one of those frames, this High Direct Mount Front Derailleur Cover ($15) from Sram should hide that mounting point, and match the rest of the group nicely.

SRAM carbon crank-arm cover-boots

Race Face has offered rubber boots as a stock item with their cranks for years, even available in a rainbow of colors, SRAM’s starting out with all black to match the new stealth group. If you haven’t heard of these, they cover the ends of expensive carbon cranks so rock gardens don’t eat your expensive investment for lunchThey are quite simple, but make a huge difference as the boots are torn up, the cranks are still fine. SRAM simply calls them the Carbon Crank Boot, and they are $10.

THM Carbone Clavicula M3 Carbon MTB Crankset

2013 THM Clavicula M3 mtb carbon crankset from Eurobike '12




THM Clavicula M3 mountain bike carbon crankset 2013


The Euro company THM Carbone has pushed their development of high-end lightweight carbon items to the dirt side of things. Their newest Clavicula M3 mtb cranks utilize the same carbon layup and design as the THM Carbone road cranks but have a dirt oriented BCD/spider with four options for sizes. Off topic on the great looking item shown above but there are some pictures below as well of their new tapered steerer carbon fork, that was released at Eurobike as well. This is their first tapered carbon fork. You may have noticed around, any road bike that used their super light fork has always been with a straight steerer. But THM is trying to change things up slowly to modern times,  only an 1/8th inch at a time.  Pictures of their Clavicula M3 mountain bike specific items along with a sweet looking tapered fork are shown below…


2013 THM Clavicula M3 mtb carbon crankset review Eurobike '12
2013 THM Clavicula M3 mountain bike bottom bracket
Eurobike 2012 THM Scapula CT tapered carbon fork

The newest from 2012 Eurobike news, a THM Carbone Scapula CT that utilizes a steerer tube that only tapers from 1-1/8″ to 1-1/4″,  baby steps are better than no steps… It has been reported CT is stiffer laterally, as to be expected, but the fore and after stiffness is a hare less than the 1″ fork model to give it more comfort.
THM Scapula CT tapered carbon fiber road fork specs




Carbon-Ti Spider-Less Ti Single Chainrings And X-Hub MTB SL — Eurobike ’12




eurobike '12 Carbon-Ti chainring


Carbon-Ti has designed some new one-by — specific chain-rings that replace the crank’s standard spider for the Cannondale Hollowgram SL and SI cranks, the SRAM X0/X9/X7 cranksets, and the Specialized carbon cranks. They are called the X-Monoring Titanium single chain-rings.The tooth sizes available are 32/33/34/35/ and 36, which will be the perfect market for 29er bikes w/ one x systems, and they are also compatible with any of the 10 or 11-speed models on the trail. By changing out the spider, you will be subtracting some more grams, as well as adding a far more durable titanium chainring. The pricing and weights haven’t been reported just yet.

Carbon-Ti mountain bike Titanium chainrings-Eurobike '12


Carbon-Ti titanium rings with mounting rings

They’ll come with mounting kits similar to this, you just shouldn’t need the bolts.

Carbon-Ti 2012 eurobike-SRAM XO cranks

This was their display example at Eurobike 2012 setup with their double Titanium chainring set, a quick idea of how posh they are built up on SRAM XO carbon  cranks.

Carbon-Ti  X-hub MTB SL hubs best for 29ers

The new Carbon-Ti  X-hub MTB SL hubs land atvery lightweights of 108 grams for the front and 196 grams for the rear. They designed the hubs with a taller flange than the previous models to give stronger angle dimensions for 29er wheels.

Carbon-Ti  X-hub MTB SL hubs

Carbon-Ti has also shaved a little weight by applying some extra machine work  and gave the new model an oversized 7075 aluminum axle. They have option for QR and 15mm thru-axle front and X12 rear thru-axles are also available.





SRAM XX1 Eleven Speed Mountain Bike Groupset

SRAM XX1 drivetrain on specialized 29er-olympic mountain bike



SRAM XX1 drivetrain on specialized 29er-olympic mountain bike





Olympic success along with Enduro Success as well for the 2013 SRAM XX1 Groupset


Now that mountain bike cog sets have been growing to bigger and bigger gear ranges than ever thought possible, the concept of single-chainring setups have been recently growing ten-fold in popularity numbers. By the simplicity of employing one single front ring means less shifting hassles, fewer dropped chains, along with better tire clearance and increased opportunities for all the newest innovative suspension designs popping up across the globe.

By knowing the evolution of dedicated drivetrains for mountain bikes, SRAM has pulled out all the stops with its 11-speed specific, single chainring groupset, dubbed the XX1.
SRAM details of new XX1 11-speed mountain bike drivetrain

SRAM XX1 is a full redesign of the whole 10-speed package, and all its components are incompatible with any existing groups.  They began with the update on the cranks with a specially designed single-chainring that does not need a device for chain retention, and they turned to the back with a new clutch-equipped, rear derailleur and a monster 10-42 cog set that requires its own dedicated freehub body.  Availability and cost will be October 2012, at $1449.00. You will also need to purchase a freehub body from DT Swiss to make the X1 cassette compatible with your rear wheel.

SRAM XX1 Carbon Crankset

SRAM XX1 Eleven Speed Carbon 1x 11 Crankset - First Look

Developed for the best possible control of the chain, each tooth is precisely CNC-machined to support the SRAM XX1 chain’s outer and inner links perfectly. They have six chain rings available, 28-30-32-34-36-38 to give you options for your gear range to match your riding area, wheel size and pedaling style. The chain rings fit a single spider—allowing you to change out the rings without having to remove the carbon crank arm.

SRAM XX1 Eleven Speed front chainring options - First Look


XX1 Eleven Speed 10-42 Cassette

X-dome cassettes are machined from a single piece of billet steel, and have an open interior—giving mountain bike riders easier clearance of mud , less weight, cleaner shifting performance and longer cassette life.
SRAM details new XX1 11-speed drivetrain 10-42 cassetteSRAM's new XX1 11-speed comparison old cog with new one


The SRAM XX1 is on the left, pictured next to a standard 12-36t setup on the right.

DT Swiss Freehub

The new XD cassette driver body design makes it possible for the drivetrain and groupset to utilize a small 10 tooth cog. Wheels with this driver body are available from these guys along with DT Swiss as well.


XX1 X-Horizon Rear derailleur/Sale Priced: $221.35

This new 11-speed X-Horizon rear derailleur is designed with a “horizontal parallelogram” and pulley offset, this keeps the chain gap constant across all 11 cogs, giving precise , fast shifts. By limiting all movement to the horizontal axis, this design is faster, reduces shift force and stops any ghost shifting. SRAM’s new roller bearing clutch technology reduces bounce and chain slap, while the derailleur’s Cage Lock system makes wheel removal and installation super easy.

SRAM xx1-Rear Derailleur at 29er Cafe


SRAM XX1 Shifters

To complete the drivetrain Groupset the shifting is done via a dedicated thumb shifter or a Grip shift unit. They updated the Gripshifter to twist on ball bearings for increased durability and smoothness, with a metal indexing system. The thumb shifter is MatchMaker compatible with all the other brakes and accessories they design in house.

SRAM XX1 Eleven Speed grip shift and trigger shifter - First Look





2013 Shimano SLX Groupset Is Paired Better For 29er Mountain Bikes

29er mountain bikes | Shimano SLX Shifters 2013


Shimano SLX Crankset 2013



A quick visual inspection at the Shimano SLX crankset indicates a two-by version on the left using a different spider design than the triple crankset pictured to the right. And the use of Torx chainring bolts indicates that they may be made of aluminum.

Shimano SLX Walk-through for 2013

Shimano has not given any weight figures yet, although the rumor is that the SLX is just a bit heavier than XT, which seems obvious. The great news is that Shimano  has designed these specifically to survive the abuse of aggressive trail riding, this means the groupset will insert into mountain bikes with travel in the five or six-inch range which is where most mountain bike riders are moving towards.
Shimano M670 10 speed Crankset
First up in the groupset is the bold shape of the crankarms is a welcome sight for strength, for getting used on everyday mountain bikes. And even better yet are the  gearing options. It has new school options of 24,32,42 as a (3×10 triple), and three choices for the (double 2×10) chainring – 40 x 28, 38 x 26 and the new, 38 x 24 gearing that’s going to pair better with 29er bikes. The rings have stamped and pinned ramps with the fast shift action that comes from most Shimano cranksets. Similar to XT, the SLX arms are built separate from the aluminum four arm spider.

  • Price: $233.00 (was $259.99)

configure/ buy information – 3X10

configure/ buy information – 2X10

29er Mountain Bike Technology
Shimano has missed the boat on 29er bikes  two times now. The first when they unveiled the recent XTR and a two years ago with the new XT groups. The new SLX group incorporates a low-profile front derailleur making room for 29er mountain bike tires, a smaller 38 x 24-tooth gearing choice for the two-by crankset, and a direct mount rear derailleur that will adapt well to 12-millimeter through-axles that most designers for 29er bikes are using in the rear of these frames to increase stiffness. The Direct Mount will eliminate the Shadow derailleur’s B2 link and the replaceable derailleur hanger with one piece, and can be used with both the standard quick-release or a through-axle.
Shift Lever Goodness
They are reporting the new Shimano SLX M670 shift levers have seen big upgrades having the crisper, more positive action of the XTR and XT brothers. The triggers have been redesigned to make ergonomics better and the front shifter can be changed to be used for two or three chainring cranks using a XTR style switch. SLX shift levers come with handlebar clamp or multi mount version.

  • Price: $98.00 (was $109.99)

configure/ buy information – 2013 M670 Shifters

Shimano SLX M670 Shifters
SLX M675 Hydraulic Brakes Also Get Ice Tech Rotors
All Shimano brakes will come stock with the finned pads and the rotors that can possibly dissipate 20-percent of the heat. Rotors come with the splined Shimano Centerlock and a six-bolt version will be available as well. Diameters being 160, 180 and 203 millimeter. The calipers have similar ceramic pistons and one-way bleeding to the XTR. The brake model shown here has a shorty lever and ServoWave action as well.

  • Price: $125.99 (was $139.99)

configure/ buy information

Shimano SLX Brakes 2013


SLX 675 and 678 Hubs
These hubs are built with angular contact bearings and they are very well sealed and you are able to adjust them easily. The Shimano hubs will come with a 15 millimeter through-axle or the standard quick release for the front and a 12-millimeter through axle for its rear hub. They have increased the engagement points in the freehub so riders will enjoy instant acceleration.

  • Price: front $35.00 (was $39.99)
  • Price: rear $53.00 (was $58.99)

configure/ buy information – front 2013

configure/ buy information – rear 2013

Shimano SLX Hubs

New Wheelsets
There are two new rims, both UST. Shimano builds it wheels by hand, which is quite the sight to see. The MT66 rim is a cross-country profile that is made in the 29er and 26-inch diameters. MT66 wheels have option for a rear quick release and 142/12 through-axle option. And the front hub is made with 15QR through-axle only.  Shimano’s 29er mountain bike wheels use 28 spokes in the rear and 24 in the front to balance the strength requirements of the larger twenty niner rims. The straight-pull hub and wheel style allows for a higher spoke tension and the wheels lasting longer.
Claimed Weight for the MT66 29er bikes wheelset are said to be 945 grams front 15mm and 1080 grams rear with quick release. The dates for release are July for the MT66 wheels. Prices have not been released yet, but Shimano claims the wheels will be in this price range for retail.

Shimano Wheelset 29er Mountain Bikes XC 2013


Single Speed MTB Drivetrain

E-thirteen singlespeed cranks-BlacK



Cutter Asymm Single Speed Chain

Cutter singlespeed chain red

cutter logo

Cutter singlespeed chain silver


Free Shipping on orders over $50 at

Sale from $11.97

Cutter singlespeed chain black


e*thirteen components XC Single-Speed Crank

E-thirteen singlespeed cranks Black

Spin to win.

Whether you’re running a 1×9 or a 1×10 setup on your MTB, or you’ve committed to one gear all the time, the e*thirteen XC single-speed crank will help keep your drivetrain spinning fast.

  • A 104 BCD gives you a wide variety of chainring compatibility options
  • The 7075 aluminum machined crank arms are lightweight and ultra-burly
  • Polygon-shaped arm and spindle interface provides stiffness and strength
  • Has a 50.9-millimeter chainline

49% Off, Regularly $295.00

Sale from $150.45

Free Shipping on orders over $50 at<

This is by far the best crank I’ve handled. I went back and forth on using a stripped down XT crank, a Stylo OCT 1.1, and a stripped down Noir for my 1×10 conversion. But when I saw the price and specs on the e.thirteen I bought it. I am running a Race Face single speed ring with MRP bb mounted 1.x guide and its great. The 30mm spindle with polygon interface translates to a very solid feeling set-up, I’ll use it on future builds, can’t be beat for the price. Its lighter than an XT at the same price and not much heavier than the XTR that cost $200 more.<br /><br /><br /> Plus, it looks badass.”>

Tech Specs

Arm Material: 7075 aluminum
Arm Length: 170 mm, 175 mm, 180 mm
BB Threading: English
Spindle: aluminum
Weight: 575 g
Compatible Components: 104-millimeter bolt circle diameter chainrings
Manufacturer Warranty: 2 years
Recommended Use: mountain biking, cyclocross, commuting