513f5dd6_es___UC_Cyclery___La_Jolla__CA__Drivetrain
[Level] pro [Brand] Shimano [Components] Dura-Ace [Comments] among the world's lightest components [Drivetrain] 
compact or standard double chainring w/10 cogs
Buyer's Guide To Road Bicycles - UC Cyclery | La Jolla, CA
Drivetrain