The BH100C sets the bottle cage 35mm off from the clamp position. On a traditional bicycle frame, it means clamping just next to the stem so the bottle cage will come to the center. On a recumbent, the offset system gives you more flexibility, but in particular, we find this clamp is more robust and easy to adjust than the BH-95X. This system has a special micro adjustment for opening size. S-version fits the diameter between 22 - 29mm (7/8" - 1-1/8"), and M-version fits 28 - 35mm (1-1/8" - 1-3/8"). Installation and removal can be done in just one lever operation. You can install quickly only when necessary, and can remove quickly when you park your bike.