Beauty Ring Threaded
Lug Nut and Ring Lug
Assembled Beauty Ring.
With the original design hidden weld titanium coupling, the lugs press into the tube and are then welded in place. Once the lugs are welded to the tube, beauty rings, which were previously pressed on the tubes, are pressed back toward the coupling to cover the welds. The beauty ring on the ring lug side of the coupling (the side that retains the nut) not only covers the weld but it provides a shoulder to prevent the nut from sliding down the tube which could scratch it. The ring also keeps debris from getting under the nut. When the coupling is screwed together, only the nut and the two beauty rings are visible, the welds are hidden. The advantage to this coupling is that the welds don't show. The disadvantage is that it's harder to install than the visible weld coupling and it's a few grams heavier.
Frame tube Tube Coupling Diameter Wall thickness Weight 1 1/4" 31.7 mm .035" .89mm 4.51 oz 128 grams 1 1/4" 31.7 mm .039" .99mm 4.66 oz 131 grams 1 1/4" 31.7 mm .045" 1.14mm 4.78 oz 136 grams 1 1/4" 31.7 mm Machine to fit Variable weight 1 3/8" 34.9 mm .035" .89mm 4.94 oz 140 grams 1 3/8" 34.9 mm .038" .97mm 5.11 oz 145 grams 1 3/8" 34.9 mm .045" 1.14mm 5.36 oz 152 grams 1 3/8" 34.9 mm Machine to fit Variable weight 1 1/2" 38.1 mm .032" .81mm 5.33 oz 151 grams 1 1/2" 38.1 mm .035" .89mm 5.43 oz 154 grams 1 1/2" 38.1 mm .039" .99mm 5.61 oz 159 grams 1 1/2" 38.1 mm .045" 1.14mm 5.85 oz 166 grams 1 1/2" 38.1 mm Machine to fit Variable weight 1 3/4" 44.45 mm .049" 1.24mm 7.34 oz 208 grams 1 3/4" 44.45 mm Machine to fit Variable weight 2" 50.80 mm .035" .89mm 8.68 oz 246 grams 2" 50.80 mm .040" 1.01mm 8.75 oz 248 grams 2" 50.80 mm 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 the
Heat Hard. UTS .2% YS Elong
Part Name Material treat Rc ksi ksi % in 2"
Coupling Lugs 6AL/4V Ti - c35 145 132 14
Coupling Nut 17-4 PH SS H900 c44 200 185 14
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.