One-by customers can choose XTR chainrings with the narrower gearing spread of the 12-speed cassette means that riders may need to keep a couple of chainrings in their toolbox to match their gearing to the task at hand. Calculating out Shimano XTR’s lowest-available, 28-tooth-chainring option fetches a low gear of 1.33:1 and a high of 1: 2.73. Compare those figures with the options from SRAM and Shimano that we covered earlier in this segment, and they indicate that hills will be harder to climb, or you will probably be spun out on the flats. Shimano’s one-by gearing options are clearly intended for racers and stronger riders who will probably choose the biggest chainring that they can comfortably push and then suffer with whatever low gear is left when the big climbs arrive.
KEY FEATURES:
| Outer Ring Material | Aluminum + Composite |
| Threaded Bb Shell Width | 68,73 |
| Compatible Bb Type | Outboard |
| Compatible Chain | CN-M9100 |
| Series | XTR |
| Inner Ring Material | Aluminum |
| Generation | M9100 |
| Chain Ring Combination | 38-28 |
| Crank Arm Length | 165,170,175 |
| Crank Arm Material | Aluminum |
Buy Shimano XTR M9100 12 Speed Crankset from Texas Cyclesport, your Online Bike Store.
