The “FB557-Basic” is one of the lightest Fatbike cranks on the market (490 grams). It is designed for Fatbikes with a “Rear Dropout Spacing” (RDS) from 165 to 177 mm and combines all the technical innovations of the 2015 “XM557 platform”, with all the advantages of the B.O.R "Smart Drive-Train Concept" and the "SmartSpindleSystem".
As Europe’s first Fatbike crank manufacturer B.O.R Germany introduced its first prototype already in the end of 2012. The very first version has now received its first revision, based on the B.O.R’s XM557 platform for 170/177 RDS.
- Fully CNC machined (Light Alloy 7022/7010/7051), anodized with noble laser-Logo
- “Scotching” (additional surface brushing)
- Crank arm lenght: 175mm - 165mm, 170mm and 172.5mm at request
- Chainline: 65.5mm
- Q-Factor: 196mm
- U-Factor: 179mm
- K-Factor: 128mm
Spindle length, chain line, K-factor and Q-factor of this crank was designed for Fatbikes 170/177 RDS (Rear Dropout Spacing) of 165 to 177 mm (narrow version). These usually have a rear dropout clearance of 165-177 mm.
Smart Drive-Train 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!
The specific bottom bracket shells, spiders and chainrings are available separately.
Developed in cooperation with Tune 2012, the “Smart Spindle System” serves as the basis for all B.O.R MTB cranks and secures for installing our cranks into 11 different bottom bracket types.
Standard arm length 175mm - for 165mm, 170mm or 172.5mm 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.