... power on bicycles, motorcycles, machinery. ANSI B29-1 roller chain standard sizesSizePitchRoller diameterTensile strengthWorking load250.250 (6.35 )0.130 ... )600.750 in (19.05 mm)0.469 in (11.91 mm)7,030 lb (3,190 kg)1,980 ... in (28.58 mm)50,000 lb (23,000 kg)11,900 lb (5,400 kg)1802.250 in (57. ... (10,090 kg)Update Date:2011-6-23 21:14:11 Roller Chain or Bush Roller Chain With ISO9001:2000 Approved