... power on bicycles, motorcycles, machinery. ANSI B29-1 roller chain standard sizesSizePitchRoller diameterTensile strengthWorking load250.250 (6.35 )0.130 ... ,190 kg)1,980 lb (900 kg)801.000 in (25.40 mm)0.625 in (15.88 mm)12,500 ... kg)1401.750 in (44.45 mm)1.000 in (25.40 mm)38,280 lb (17,360 kg)9,040 ... ,090 kg)Update Date:2011-6-23 21:14:11 Roller Chain or Bush Roller Chain With ISO9001:2000 Approved