Search query: 12 speed groupset

Product: SHIMANO XTR RD-M9120 Rear Derailleur Stealth Gray, SGS 12 Speed Shimano may have taken its sweet time when jumping into the world of 12-speed, but patience is a virtue, and it seems like our wait was certainly rewarded, as its new XTR 12-speed groupset soars right back to the front of the cutting edge, while offering even better shifting performance than before. But just because Shimano soared into the future doesn't mean its designers didn't still keep an eye out for those who are still all-for the two-by persuasion, and the XTR RD-M9120 Rear Derailleur drives the point home. This two-by optimized rear derailleur is specifically designed to pair Shimano's 10-45-tooth 12-speed cassette with a double-ring crankset, offering more gears than most of us know what to do with, while keeping things quiet and smooth. The M9120 Rear Derailleur sees improved chain stability and reduced friction thanks to larger 13t pulley wheels, making it better able to withstand full-force pedaling while shifting gears as smoothly as ever. Shimano was also able to decrease the rear derailleur tension in the lower gear positions, preventing the high chain tension that causes excess friction and noise, and thus a loss of efficiency. The Shadow RD+ clutch system provides excellent chain retention in rough terrain, and keeps annoying chain slap to a minimum. Lastly, the addition of a protective bumper to the inside of the derailleur cage quiets operation even further by cushioning the sound of any chain rub. Because the RD-M9120 is optimized for a two-by system, it only comes in Shimano's SGS model. This means the derailleur has plenty of range to take on the new 10-45t Ryhtym-Step 12-speed cassette, and allows for some play in the front when you're swapping from the little ring to big ring. Material: aluminum
Capacity: 41t
Cassette Range: 10 - 45t
Gearing: 2 x 12
Compatibility: [chain] XTR CN-M9100, [cassette] XTR CS-M9100, [shifter] XTR SL-M9100-R, XTR SL-M9100-IR, [front derailleur] XTR FD-9100-M, XTR FD-9100-E, XTR FD-M9100-D SHIMANO Stealth Gray

Product: SRAM XX1 Eagle AXS Upgrade Kit - Rear Derailleur, Battery, Eagle AXS Controller w/Clamp, Charger/Cord The SRAM XX1 Eagle AXS Upgrade kit includes all of the electronic shifting components needed to introduce customizable AXS technology to your Eagle drivetrain. Includes the SRAM XX1 Eagle AXS rear derailleur with battery, Eagle controller with clamp, and charger and cord
The XX1 Eagle rear derailleur provides instantaneous shifting from a single touch, even under the heaviest of loads, and eatures a shorter cage that allows for 10mm more ground clearance and more chain wrap on the cassette
The Eagle AXS controller offers a unique wireless shifting experience with ergonomic touchpoints that are customizable to your preferences - you can choose what each button does through the AXS App SRAM