B.O.R Germany XM557-1X + Smart Spindle System Crank with Spider 76mm - black-black

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Description of B.O.R Germany XM557-1X + Smart Spindle System Crank with Spider 76mm - black-black

The XM557 X1 is the first complete B.O.R 1-speed crankset. It combines all the technical innovations of the XM557 Basic cranks with all the advantages of an easy-to-use single-chainset and the ultimative compatibility of bottom brackets. And thanks to the "Smart Spindle System" allows the crank platform now installed in 11 different bottom bracket types!

Detachable spider for one 76 mm BCD chainring included.

The XM557-1X is the synthesis of the XM557 Basic cranks as a “carrier” (460 g) and a mounted XX1 drive-train unit (from 60 g) and results at just 520 grams. With its 76 mm hole diameter (like SRAM XX1) it provides easily replaceable 30T - 32T - 36T - 34T - 38T chainrings.

  • Fully CNC machined (Light Alloy 7022/7010/7051), anodized with noble laser-Logo
  • Crank arm lenght: 175mm - 165mm, 170mm and 172.5mm on request
  • chainline: 49.5mm
  • Q-Factor: 164mm
  • U-Factor: 147mm
  • K-Factor: 96mm

Smart Spindle System
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.

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 CrossCountry-, Marathon and AllMountain Frames! These usually have a rear dropout clearance of 135-148 mm.

Attention: The XM557 cranks are only suitable for Cross Country, Marathon and All-Mountain riding, and NOT for Downhill or Enduro!

Standard arm length 175 mm - for 165, 170 or 172.5 mm please contact our service team.

Please note: 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.
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Fact Sheet of B.O.R Germany XM557-1X + Smart Spindle System Crank with Spider 76mm - black-black

Product Name: B.O.R Germany XM557-1X + Smart Spindle System Crank with Spider 76mm - black-black
Manufacturer: B.O.R Germany
Item Code: ORB205461
Year: 2016
Manufacturer item code:
Material: 7022/7010/7051 aluminium
Weight: approx. 490 gram (with spider, without chainrings - manufacturer information)
Crank length (mm): 175mm - 165mm / 170mm / 172.5mm on request
Color: crankarms: black
locknuts / spider: black
Axle profile: 30 mm Smart Spindle System
Bolt Circle (mm): 76 mm (4-arm)
Chainline: 49,5 mm
Q-Factor: 164 mm
Included in delivery: crankarms, spindle, locknuts, bolts, spider-lockring, 4-arm spider
without chainwheels
without chainwheel bolts
without bottom bracket
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