Originally Posted by TheDL
I used a OnGuard Mini-U with my old road frame, perfect size. With my current touring frame though the Mini-U shackle isn't wide enough. So I had to get a OnGuard Bulldog MTB Standard. In both cases I use a cable to secure the front wheel.
The lock should go around your rear wheel, just behind the seat tube, not around the frame. The OnGuard Mini will fit around even a mountain bike wheel and a post the size of the post on a parking meter. Buying a larger size lock and putting it around your frame leaves the rear wheel unsecured, and leaves empty space inside the "U" for crooks to insert their favorite leverage tool.