SRAM Rival 1 GXP 172.5mm 110 42T X-Sync Crankset No BBFeaturing forged aluminum arms and SRAM's game changing X Sync chainrings, this crankset hits the sweet spot between weight, durability and performance. X SYNC Chainrings are compatible with SRAM 11 and 10 speed chains 45. 5mm chainline is compatible with 130 or 135mm spaced rear dropouts Chainring spider is removable Q factor for GXP cranks is 149. 6mm, Q factor for BB30 is 147. 4mm Item Specifications BB Included No Chainline Hub Compatibility 130
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