Eleven81 Thorn Resistant Bicycle Tube - 700 x 28/32 (27X1-1/8,1-1/4) - Shrader Valve - TUBE7403 (700 x 28/32 (27X1-1/8,1-1/4)) 1.8Mm/3.0Mm Butyl Wall Thickness With The Thicker Part To The Ground Molded For Higher Quality Available As A Case Of 20