Photo courtesy of Rans
Frame tube Tube Coupling Diameter Wall thickness Weight 1 1/8" 28.6 mm .035" .89mm 6.00 oz 170 grams 1 1/8" 28.6 mm Machine to fit Variable weight 1 1/4" 31.7 mm .031" .mm 6.53 oz 185 grams 1 1/4" 31.7 mm .035" .89mm 6.70 oz 190 grams 1 1/4" 31.7 mm Machine to fit Variable weight 1 3/8" 34.9 mm .035" .89mm 7.23 oz 205 grams 1 3/8" 34.9 mm Machine to fit Variable weight 1 1/2" 38.1 mm .040" 1.01mm 8.47 oz 240 grams 1 1/2" 38.1 mm Machine to fit Variable weight 1 3/4" 44.5 mm .035" .89mm 10.23 oz 290 grams 1 3/4" 44.5 mm Machine to fit Variable weight 2" 50.8 mm .035" .89mm 12.34 oz 350 grams2" 50.8mm Machine to fit Variable weight
Machine to fit couplings can be machined by a framebuilder to fit tubes that we don't produce a coupling to fit.To calculate the weight increase resulting from adding couplings to a frame subtract the weight of a NA inch long piece of tube removed for each coupling added
Heat Hard. UTS .2% YS Elong
Part Name Material treat Rc ksi ksi % in 2"
Coupling Lugs cro-mo NA NA NA NA NA
Coupling Nut 17-4 PH SS H900 c44 200 185 14
Rubber seals NA
Data shown above is believed to be representative but should not be used for design or application selection purposes. Specifications are subject to change without notice.
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