With nothing in the market existing to achieve this

cracking and breaking

This hub features a CNCd 6061 aluminium hub shell with a heat treated 4130 crmo female axle

finished with wrap around gussets top and bottom increasing their strength and rigidity

WEIGHT: 20” x 1

S&M Trackmark Kevlar Tyre Subrosa With nothing in the marketThe Trackmark is S&M's race specific tyre, built for speed and grip. It's designed with a lightweight folding kevlar bead, a lightweight and strong high TPI casing to get you up to speed quickly and hold tight in fast turns. The centre tread of the Trackmark is broken to increase acceleration, braking traction and to further reduce weight. It's a smooth, fast tyre designed for todays hard packed and paved tracks. Max pressure rating: 110psi.