Shimano SM-RT56 Disc Brake Rotor 6-Bolt (160-mm)

Quality Shimano brake rotor.

Perfect 1.5 thickness did not have to adjust anything

I go through rotors pretty fast as I live at the beach and the light rust (iron oxide) the rotor gets on it between rides is an excellent abrasive to wear the rotors thin at an accelerated rate. My rotors last about 2 years. I was looking for a lower cost rotor from a name brand company and these rotors fill the bill. They include new T-25 Torx mounting screws but not the wrench, so if you don't have this bit you can buy one at the local hardware store for under a $1. These rotors come blister packed on a sheet of cardboard. They arrived straight and true and I have no complaints. I don't think you can find a better rotor for the price.

You can go ahead and pay a lot more for rotors that will do the exact same job as this one, or you can do like me and buy these and call it good. Works well with metallic, semi metallic, and organic pads, although label recommends organic only.

I needed a replacement disc, as I had come off a ledge and landed on my previous rear disc and bent it up pretty good. Swapped it out with this one and haven't had any issues.

I needed rotors to replace the Mongoose Dolomite rotors, which were not ground flat and pulsed since Day 1. These fixed the problem. Also installed Shimano mechanical calipers. Haven't yet broken in the pads, but the initial braking action is good and it's nice to have smooth braking response.

This is a stamped part with unacceptable axial and radial runout, it does not run true on my bicycle hub and, in fact, is a very inferior part compared to the machined brake rotor on my 30 year old bicycle. I can't use this stamped junk rotor and will return it for a refund. The printing on the new and old hubs tells the story- the new rotor is labeled "Shimano- China" my old hub is labeled "Shimano- Japan.

This rotor is the most basic of the Shimano lineup: as long as it is clean works very well. If you’re looking at entry level rotors and want to stay with brand name: this is great quality and perfect for purpose. I went with 4* here because sometimes you can get one of these with a tiny bit of a bend in it, and that will require some adjustment.