1-Hole Clamp-On Idler Mount

Clamp on Idler Mounts are great for letting you mount idlers where you really want them. If you have a bike/trike where the chainline has just never been right, or you are changing to a hub gear drivetrain, or you just want to try something different, these are the thing for you.We make a wide range of clamp sizes so we can be sure they will fit perfectly and clamp super strongly.  Each of these clamps has one 8mm threaded holes for mounting idlers (or racks, or brackets, or whatever else you can dream up). We also sell 3-Hole Clamp-On Idler Mounts and 5-Hole Vertically Adjustable Clamp-On Idler Mounts. FAQ 1. Why so many sizes? Because there are so many different sizes of tubes out there to attach to. It's important the clamp be exactly the right size to ensure the amount of grip needed. We even machine them with the paint thickness taken into account. 2. How do I know which one to get? First you need to measure the size of the tube you'd like to clamp to. If you don't have a good mea