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19mm GDH heat-treated Cr-Mo Axle
Made of high-quality butted chromoly
Paragon Imperium H
High Pressure (100PSI)
GSport Birdcage Rim Hats 19mm GDH heat-treated Cr-Mo AxleLIGHTWEIGHT STRUCTURE At first glance the Birdcage looks like a fairly conventional aero style rim, but there is more to it than that. The first clue comes from the name; birds have hollow bones to save weight whilst retaining as much strength as possible, & the Birdcage rim has a hollow bead for the same reason. The rims hollow bead is still big & chunky to help reduce the chances of pinch puncturing or flat spotting the rim, but by creating a tiny
