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Sonic Airskewer
Originally designed by Mike Burrows to go with the LOTUS bike ridden by Chris Boardman.
Weight- and aerodynamic advantage over conventional skewers. Requires axles tapped to M6 thread.
Not secure in frames with horizontal drop-outs, may pull the wheel over, as it uses an M4 allen key to tighten. Aluminium washers available in red anodising only, bolts are stainless steel.