Being one of the worlds most compatible crankset the XM557-2X combines an unmatched transmission range with maximum bottom bracket compatibility at low weight! And thanks to the "Smart Spindle System" allows the crank platform now installed in 11 different bottom bracket types!
The XM557 2X is the synthesis of the XM557 Basic cranks as a "carrier" (460 g) and a mounted X0 drive-train unit (from 101 g) and results at just 500 grams. With its X0-compatible bolt cycle diameter (104/64BCD), it offers an unrivaled selection of transmissions and rings: 34/20 - 36/22 - 38/24 - 40/26.
Detachable 2-speed spider for a 104/64mm BCD chainrings included.
Smart Spindle System
- Fully CNC machined (Light Alloy 7022/7010/7051), anodized with noble laser-Logo
- Crank arm length: 175 mm - 165, 170 and 172.5 mm on request
- Q-Factor: 165 mm
- U-Factor: 137 mm
- K-Factor: 96 mm
Developed in cooperation with Tune 2010, the "Smart Spindle System" serves as the basis for all B.O.R MTB cranks and secures for installing B.O.R. cranks into 11 different bottom bracket types.
Overview of all compatible bottom bracket types:
BSA68 / BSA73 / BSA73 MTB eType / ITA70 / BB30/73 MTB Cannondale / BB85/84,5 MTB Specialized / PF30/73 MTB / BB386EVO/91,5 MTB PRESSFIT / BB Right/84 MTB PRESSFIT / BB92/89,5 sym. MTB Pressfit / BB92/92 asym. MTB Pressfit
The specific bottom bracket is available separately.
Smart Drivetrain Concept
B.O.R. provide a versatile usability of the crank. Even regular with a spider or "Plug and Play"- power measurement on the spider. Thus B.O.R cranks are "Power Meter-ready" and enable the simplified retrofitting of measuring units from SRM and Power2Max!
Spindle length, chain line, K-factor and Q-factor of this crank was designed for regular Cross Country, marathon and All-Mountain frames! These usually have a rear dropout clearance of 135-148 mm.
The XM557 cranks are only suitable for Cross Country, marathon and All-Mountain
riding, and NOT
for downhill or enduro!
Standard arm length 175mm - for 165, 170 or 172.5 mm please contact our service team.
A Shimano cassette tool (such as the Park Tool FR-5 Freewheel Remover) is required to mount the lock nut. The crank is supplied without a manual.