US$ 59.00
What set the Proton apart from the Neutron are a 100% CrMo frame
5" Hi Ten Steel
and an embossed 1-piece seat/post combo
The Tiro has a 21" top tube
Mid BB kit from BSD
Eclat Mid BB Size:19mm What set the Proton apartCNC'd Mid Bottom Bracket available in 19, 22 and 24mm sizes. With etched Eclat detailing and lightweight aluminium spacers.
US$ 59.00
US$ 35.00
US$ 35.00
US$ 29.00
US$ 29.00
US$ 32.00
US$ 32.00
US$ 110.00