Donnelly BOS

Bike Ahead Verified independent store

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• The BOS is named after the airport code for Boston, the original hotbed of North American 'cross and home to some of the nastiest courses • Even more aggressive than the PDX, it has buttressed side knobs for outstanding traction in super muddy corners and off-camber sections and a center tread that's all bite • Tractor style tread for the harshest mud Show more