Shimano Ultegra CS-R8100 11-30 12速飛輪

Switching from my old 11-speed to this 12-speed cassette was immediately noticeable on the steepest local climbs—the 11-30 range gives me just the right gearing to spin up without grinding. The shifting feels precise and crisp every time under load, which I appreciate during hard efforts.

Climbing out of the saddle feels seamless now—the gear steps between 11 and 30 are so smooth I barely notice the shift. It's the first cassette I've owned where the 12-speed spacing actually makes slow grinding up steep grades feel effortless.

The 11-30 range is perfect for my hilly rides, letting me spin up steep grades without spinning out on descents. Shifts are crisp and quiet, though I wish it came with a lockring to save a few bucks.