... mechanical power on bicycles, motorcycles, machinery. ANSI B29-1 roller chain standard sizesSizePitchRoller diameterTensile strengthWorking load250.250 (6.35 )0.130 ... )1201.500 in (38.10 mm)0.875 in (22.23 mm)28,100 lb (12,700 kg)6,800 ... (47.63 mm)112,500 lb (51,000 kg)22,250 lb (10,090 kg)Update Date:2011-6-23 ... 21:14:11 Roller Chain or Bush Roller Chain With ISO9001:2000 Approved