Pros: Even though they're only headset spacers we don't doubt they are among the best quality you can buy

Designed & manufactured by Vorsprung in Whistler

Cogs - 10-12-14-16-18-21-24-28-32-36-42-50

- Test and monitor yourself with an in built Fitness/Zone test and Training Zone calculator

Shimano SLX CS-M7100 12 Speed Cassette - Shimano Micro Spline - 10-45T - 12 Speed PDP|PLP|Brake Rotor Type Pros: Even though they're onlyThe SLX CS M7100 12 Speed Cassette offers the excellent shifting performance that we have come to love from Shimano in both Wide Range and Rhythm step options. Both cassettes feature Beam Spider technology for increased weight savings, rigidity and durability. The main difference from XT is one less alloy sprocket and a slightly heavier spider. They also feature the Hyperglide+ technology found in XTR, offering Shimano's smoothest ever shifts. The 10