Silca Latex Inner Tube + SpeedShield Size:42mm + 40mm Extender + SpeedShield incredible shifting efficiency

incredible shifting efficiency

tidy and light mount that integrated perfectly

614 inch (41 mm) seat rail grip length

and assists with moisture wicking

Silca Latex Inner Tube + SpeedShield Size:42mm + 40mm Extender + SpeedShield incredible shifting efficiencySILCA has partnered with Vittoria, to create the highest quality, lowest rolling resistance, finest riding inner tube, sized for modern clincher tire setups. Why Latex? Compared to standard bicycle inner tubes which are made of WheelsTybutyl rubber, latex is significantly more elastic (10x elongation compared to 2 3x), but more importantly, latex rubber has significantly lower coefficient of damping which means that when latex rubber is stretched or