Shimano ALTUS CS-HG31 8 Speed Black MTB Cassette SprocketShimano Altus CS HG31 8 Cassette 8 Speed MTB Mountain Bcicycle Bike Hyperglide Black Model: CS HG31 8Teeth: 32 34TSpeed: 8 SpeedWeight: approx 310gHyperglide sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under loadSprockets are cut away to reduce weight without reducing rigidity

Front Derailleur Style: Topswing

Speed: 2 X 11 (Dynasys 11)

Optional Style: 27 Speed

Average weight       : 610g /pair

Speed: 2x9

This Shimano Dura-Ace 11-speed chain is lightweight and comes with Shimano's HG-EV symmetrical design chain for smooth shifts and maximum durability

Recommend Cleats: SM-SH56

The RAPIDFIRE PLUS lever features 2-WAY RELEASE and quick Multi-Shift action

Shimano DEORE M6100 12 Speed SL-M6100 Shiter Lever Specifications: Series: Deore M6100

Crank fixing screw included           : Yes

With 2-Way-Release

Wide range and close step 12-speed drivetrain