ARISUN SHARKTOOTH 26x4.0 BLACK FOLD/120 TR/152-STUD TUBUS Converts a 68mm wide BB30

Converts a 68mm wide BB30 bottom bracket shell to an English BC 1

5mm thick 7075 alloy for incredible strength

Available with LED tail light in AC for Dynamos

X4P Quattro Locking Mechanism for four-sided protection

ARISUN SHARKTOOTH 26x4.0 BLACK FOLD/120 TR/152-STUD TUBUS Converts a 68mm wide BB30Three rows of longitudinal tread lugs, arranged in a directional V design to maximize traction on ice, snow and soft terrain The triangle arrangement of the studs makes the tire stable and maximizes traction for confident riding in all conditions 26x4. 0 has 152 spikes while the 29x2. 8 has 220 spikes Studs have a tungsten alloy tip with zinc plated steel base for longevity