Vee Tire Crown Gem Tire 27.5x2.8 Folding Bead SCThis is the Vee Crown Gem made with the Silica Compound from Vee Tire. Sized at 27.5 x 2.8, this is a plus size tire that is ideal for mountain and trail riding because of tall knobs and the aggressive center knob pattern gives serious traction. The Silica Compound is designed for maintaining superior performance in colder to below freezing conditions. 120 TPI.848712065319