If you need to measure spoke length

You will give up the super-easy climbing gear but gain more even spacing between the gears and the ability to run a shorter cage derailleur

spring material300 series stainless steel

The 28T and 26T sizes will mount to the inner 64 BCD mounting position on these cranksets

Shimano SLX BR-M7120 Disc Brake Caliper Only - Black - Caliper Only Exclusive If you need to measureThe Shimano SLX BR M7120 is a four piston disc brake caliper that has benefited from the trickle down of technology from the XT and XTR models. Four pistons provide you with huge stopping power but also have more modulation than the two piston models. The calipers ship with both finned NO3A (resin) pads but they are also compatible with N0C4 (metallic) as well as the non finned D03S (resin) or D02S (metallic) pads. Who is this item for: Riders who