What set the Proton apart from the Neutron are a 100% CrMo frame

Includes LH and RH threaded alloy cups

BSD stamped logos on the plates and has undergone Teflon rustproofing treatment before leaving the factory

Medium: 105g / 3

Box Three Race V-Brakes Size:85mm What set the Proton apartThe Box Threebrake arms are cold forged and CNC machined from 6061 T6 aluminum and feature 35 millimetres of vertical brake pad adjustmentmore than most linear pull brakes. Cold forging produces the strongest, stiffest, lightest weight and most durable bicycle parts. Other features include sealed bushings, stainless steel hardware, a flexible cable noodle and streamlined cable fixing point.