B.O.R Germany FB557-1x 170/177 FatBike Crank Arms with Spider 76mm - black-black

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Description of B.O.R Germany FB557-1x 170/177 FatBike Crank Arms with Spider 76mm - black-black

The FB557-1X is one of the lightest Fatbike cranks on the market (520 grams). It is designed for Fatbikes with a RDS (Rear Dropout Spacing) 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 Drivetrain Concept" and the "Smart Spindle System".

Detachable spider for 1x 76 mm BCD chainring included.

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.

Technology:
  • Fully CNC machined (Light Alloy 7022/7010/7051), anodized with noble laser-Logo
  • Scotching - additional surface brushing
  • Crank arm length: 175 mm - 165, 170 and 172.5 mm at request
  • Chainline: 65.5 mm
  • Q-Factor: 196 mm
  • U-Factor: 179 mm
  • K-Factor: 128 mm

Rear-Dropout-Spacing (RDS)
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 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! The specific bottom bracket shells, spiders and chainrings are available separately.

Smart Spindle System
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 our cranks into 11 different bottom bracket types.

Bottom brackets and chainrings are sold separately.

Standard arm length 175 mm - for 165, 170 or 172.5 mm please contact our service team.
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Fact Sheet of B.O.R Germany FB557-1x 170/177 FatBike Crank Arms with Spider 76mm - black-black

Product Name: B.O.R Germany FB557-1x 170/177 FatBike Crank Arms with Spider 76mm - black-black
Manufacturer: B.O.R Germany
Item Code: ORB238528
Year: 2016
Manufacturer item code: 03.02.01.506.04.77.77
Material: 7022/7010/7051 aluminium
Weight: approx. 520 gram (without chainrings and spider - manufacturer information)
Crank length (mm): 175mm - 165 / 170 / 172.5 mm on request
Color: crankarms: black
locknuts / lockring: black
Axle profile: 30 mm Smart Spindle System
Bolt Circle (mm): 76 mm asymetric
Chainline: 65.5 mm
Q-Factor: 196 mm
Included in delivery: crankarms, spindle, locknuts, lockring, bolts, spider
without bottom bracket
without chainrings
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