... -18,3.25/3.50-17 inner type butyl inner tube performance: The inner type is one of the important parts of ... strict accordance with the GB7036.2-1997 standard. The Inner type technical indicators1. Elongation at break : ≥ 450 %1. tensile strength for ... and trade including motorcycle chain wheel, driving chain, shock absorber, brake shoe, lights, pump and all other motorcycle parts. We sincerely ...