BOR crank XM557 2X SmartSpindleSystem 2x LK120 | 80 with chainrings
The XM557 crank the German manufacturer BOR based on the proven XC666. However, changes and advancements let the weight of the XM557 continue tumbling down. In detail, this means a weight-reduced Lockring fixed optimized Spider. The crank arms have been calculated once again and could lose a few grams. The arms are mounted on an aluminum shaft with 30 mm diameter to meet even most powerful sprinter with excellent rigidity.
BOR typically comes also the proven Smart Spindle System is used, which makes it possible to build the crank in almost any context. Furthermore, even the Spider can replace. The crank is therefore prepared for any future changes.
The CNC machined chainrings BOR aluminum are hardened in a special process with a glass mount peening and then anodized with double the usual thickness. This Double Surface Treatment gives the leaves a significantly increased shelf life!
The size chainring has various switching ramps and -gassen, providing a fast and reliable switching operation.
Made in Germany!
intended use: Cross Country, Marathon, Tour
Material: alumnium (7022, 7010, 7051)
Crank arm: 170 mm, 175 mm (165 mm and 172.5 mm on request)
Shaft: 30 mm diameter
Q: 164 mm
Chainring spider: 2-fold with LK 120 | 80 mm
chain line: 49.5 mm
Bottom bracket: BSA, BB89,5 / BB92, BB30, PF30, BBright MTB, BB386 EVO MTB (optional)
Chainring: 36 - 24, 38-25, 40-26 or 42-27 teeth
Compatibility chain: 10x
Color crank arms: black
Color Spider / crank bolt: black, orange, red, blue or acid green
Weights without bottom bracket:
570g 36-24 teeth
580g 38-25 teeth
590g 40-26 teeth
600g 42-27 teeth
Delivery: crank arm left / right shaft chainring spider, chainrings, Locknut
Note: a frame corresponding internal stock must be purchased separately. All
Variations and more, you'll find in our extensive shop offer.