Combo Mini U-Lock - 3.5 x 5.5", Combination, Black/Yellow Andorra They use a narrow/wide design

They use a narrow/wide design specifically tailored to road/cx/gravel applications

and a wide

a pair of interchangeable Liner Quick Handles along with a full complement of bearing guides and receiver cups to ensure efficient and accurate bearing removal and installation

MRC (Modal Resonance Cancellation): Tuned to cancel resonance and vibration

45mm aerodynamic rim depth

Combo Mini U-Lock - 3.5 x 5.5", Combination, Black/Yellow Andorra They use a narrow/wide designPopular Mini length with X2P Double Bolt protection combined with improved user settable steel ball click combo lock system. Includes Snap Lock Quick Release multiposition mounting bracket