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Your cart is empty.As you'd expect from Shimano's top-tier mountain bike group, the XTR SL-M9100 Trigger Shifters are precise, quick, and offer an ergonomic design that's comfortable to keep a finger on for fast changes on steep climbs and rooty descents alike. In years past we expected to see a lot of similarities between a shifter and its predecessor, but this year Shimano broke the mold with an all-new shifter that features a sleek, dark look, and faster, easier actuation. The new shifter reduces lever access time bu a claimed 20%, while simultaneously reducing the force required to operate by 35% compared to the M9000. The lighter force makes it easier to rapidly shift through your cassette during transitions from steep descents to punchy climbs, so you can land at the perfect gear, and avoid shifting under serious load. The new shifter is available with Shimano's I-Spec EV which allows you to better customize your cockpit. I-Spec EV features 60-degrees of rotational adjustment, compared to the 15-degrees of I-Spec II, and 14-millimeters of side-to-side adjustment to achieve comfort and control on the bars. Clamp-mount shifters are also available for riders with smaller hands. Should you be opting for a two-by setup, Shimano offers a single-blade left lever that simplifies front shifting by allowing you to push with your thumb to shift up to your big ring, and push a second time to release back to the small ring. The Shimano SL-M9100 Trigger Shifters are available in left or right hand units. The right lever is compatible with 12-speed Shimano R9100 groupsets; the left lever is, with Shimano's double R9100 cranksets. Left and right are sold separately, so be sure to order one of each if you're looking to run a double setup.
Katharine Jacobson
Reviewed in the United States on August 23, 2024
This is an enormous drivetrain upgrade in terms of shifting feel. The downshifts are crisp and can move 4 gears, and the double upshift function is great feature.
definitely used. box torn up, wire is a mess
Reviewed in the United States on August 17, 2023
torn up box , wire a mess
Arnold M. Dzick
Reviewed in the United States on June 24, 2022
I especially like the option to down shift two ways
Bysmrt
Reviewed in the United States on August 30, 2021
Very good. It is quite "crisp" and not as smooth as a previous (and quite a few years back) XTR shifter, but it is very precise.I bought it to replace a SRAM shifter that came in my 2021 Santa Cruz Blur (I am not fond of the SRAM thumb shifters) and works like a charm with the SRAM real derailleur.
geochemistry
Reviewed in the United States on April 23, 2021
This XTR was both 11 and 12 speed compatible with the flip of a switch, but Shimano has removed the switch and this updated version is 12 speed only.
bikercr
Reviewed in the United States on July 22, 2020
I've used the 12-speed XTR M9100 shifter for about 1 year. Shifting performance is flawless, solid, quick and butter smooth with excellent feedback so you KNOW you've shifted. Works in perfect harmony with the M9100 chain, crankset, rear derailleur and 12 speed cassette so you can shift quickly and easily under full load while climbing. One big problem: I've had two of these shifters fail after about 3-4 months normal use. The longer downshift lever misses "catches" and just swings with no resistance and no shift, intermittently, but once this starts, it doesn't change. The defect is an overly weak and brittle rocker spring, not user replaceable. This is the 10 cent part that breaks the $125 machine. Because I've had two new shifters fail this way, it's not a fluke. The picture attached shows where the spring breaks (lower arrow).
Carl D. Antone
Reviewed in the United States on June 11, 2020
Feels notchier and less precise than the previous M9000. Accomodates 11 or 12 speed with the adjustment of a hex nut. Trigger position is worse for my hand, making my thumb travel down and around the lever rather than cleanly under it. Seems worse ergonomically and less efficient.
Mike
Reviewed in the United States on November 29, 2020
Positive shifts, very smooth an precise
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