1/8 Axle (3mm) After 3 years of research and development, we have produced the tire for the 21st Century. These new wheels are lightweight, shock absorbing, fuel resistant and built extremely TUFF. - 1/8" (3mm) Axle Dia. Can be drilled to 5/32" (4mm) - Fits inside most wheel and retracts - .730 width (18.54mm) - Shock absorbing
