12 THINGS YOU NEED TO KNOW ABOUT SHIMANO XTR M9100
On 25th May, Shimano released the full details of their latest XTR group set. Each time XTR gets redesigned, we all go wild. So bright! So shiny! So new! But it has been a long time since Shimano’s leading off-road group set was so new – for XTR M9100 Shimano started afresh and designed the group from the ground up. Here’s a look at the pertinent details – head to AMBmag.com.au for more.
This is was wide as it gets
With a 10-51 12-speed cassette, Shimano have hit back with a 510% gear range with a single chainring system. There is also a 10-45 cassette.
To facilitate adding a 10t sprocket, Shimano created a new freehub body. It’s also a lighter body than before, and as of printing only available on Shimano and DT Swiss hubs.
No more wheel sets
Recognising that we all want different rim materials, weights and widths – Shimano just do XTR hubs in Boost and non-Boost, 28 and 32 hole, straight pull or J-bend. The hubs are also considerably lighter than before.
Race or Enduro?
The R is for racing, and the XTR Race parts are optimised for XCO, and the XTR Enduro parts are optimised for Enduro racing, including 4-pot brakes.
2x isn’t dead
So with a 510% range with 1x, there is also a 2x option with 28/38 chain rings using the 10-45 cassette to deliver a range well over 600%.
Direct mount chain rings
No more new bolt patterns, Shimano have gone direct mount with chain rings from 30-38t available. They also save about 100g with the Race crank while the Enduro model is beefier.
Tune in to the trail
With the Micro Spline freehub comes a new hub engagement called Scylence. It is a super quiet drive ring engagement system that gets rid of pawls for engagement suited to the high loads of a wide range cassette. Along with a chain, cassette and chain ring tooth profile that reduces clatter – listen to your tyres, wind in the trees and sounds of the trail - not your freewheel and shifting.
Feather touch shifting
With longer shift levers and updated cable outer, Shimano claim a much lighter and faster shift. With a new brake clamp location they also claim much stiffer braking thanks to a lever clamp that braces against the bars. A new iSpecEV mount also allows far more range to position the shifter exactly where you need it.
This iteration of XTR has no Di2. For now. It’s not going anywhere on the road so we’re keeping our eyes peeled to see if any electronic wizardy comes back to the dirt. New frames like the Canyon Lux don’t have Di2 ports - but who’s to say wires are involved in the future?
Dropper posts are everywhere, and Shimano have a neat lever that uses their new iSpecEV system to mount under the bar on the left, working with any post that uses 7mm cable pull.
There’s still 11 speed
That’s right, you can get an Enduro specific 10-45 11-speed cassette which uses it’s own hub with wider flange spacing for a stiffer and stronger wheel. It’s very race and performance specific. But that’s what XTR is for. We’ve heard this extra flange width creates a wheel with the stiffness of Superboost within the 148x12mm standard.