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Highly popular trials hub from Echo, the TR features a very lightweight construction, a tough axle and quality bearings to match.
|s - spoke hole diameter||2.5mm|
|D1 - non-drive side flange diameter||56mm|
|D2 - drive side flange diameter||28mm|
|W1 - hub centre to non-drive side flange||21mm|
|W2 - hub centre to drive side flange||37mm|