SRAM Force Chainset 172.5mm 50-34T with TNT Chainrings AND 68mm GXP BB Cups £249.99 #476602 Specifications: Size: 172.5mm
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Description

Arm Material: Carbon/6K Weave
Chainring Material: New PG Chainrings with TNT Coating/Alloy Chainring Bolts
Available Arm Lengths: 170, 172.5, 175mm
Available Ratios: 53/39 and compact drives 50/36 & 50/34
Compatability: GXP\" Bottom Bracket.