Hayes Feel'r Gauge Disc Brake Alignment Tool

While I respect the positive reviews about this tool, my experience with it is not consistent with those remarks. The rotor, itself, is far too thin to allow this tool to do what it purports to do: center the rotor in the caliper. This tool just adds another layer of metal to both sides of a rotor that cannot resist bending when brakes are applied. Each time I've tried to use the tool, I've ended up having to realign the caliper using backlight and eyeball. Sorry to say, this is the one tool I've purchased for the bike that was a waste of money. I've very sorry I purchased it. It might offer some initial centering of the braking system, but that must be followed up with other methods -- so I rated it two stars on the possibility that it might get one started in the direction of properly adjusted brakes. I don't use it at all any more. Waste of time and, as I said, money.

I love it ---easy to use, great price , Delivery was SUPER FAST !!

I have used everything from a business card to a matchbook cover, but this unit is convenient and reusable. You-Tube Video makes it super easy to take the rubbing away. Bike Tires Direct price-matched and I bought 2 more as gifts for my cycling partners.

With the caliper mounting bolts loose and wheel mounted, I place the tool's metal arms on each side of the rotor, then squeeze the brake and tighten down the mounting bolts. It leaves me with a nicely centered rotor and the purple portion adds the function of a pad spreader tool. It's a very useful and time-saving tool!

I have multiple wheels for my gravel bike and this makes it easy to get them just right.