... mechanical power on bicycles, motorcycles, machinery. ANSI B29-1 roller chain standard sizesSizePitchRoller diameterTensile strengthWorking load250.250 (6.35 )0.130 ... in (3.30 mm)781 lb (354 kg)140 lb (64 kg ... in (15.88 mm)12,500 lb (5,700 kg)3,300 lb (1,500 kg)1001.250 in (31. ... )28,100 lb (12,700 kg)6,800 lb (3,100 kg)1401.750 in (44.45 mm)1.000 ...