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Shimano brake rotor compatibility?

Old 09-23-22, 12:15 PM
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bikeme
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Shimano brake rotor compatibility?

I have a 2022 Trek Emonda with SM-RT800-S rotors (the closed face style). Apparently, they are either out of stock or no longer made? What is the direct replacement? I found Shimano XT/Ultegra RT-MT800 Disc Rotors, will that work? Thanks!
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Old 09-23-22, 12:58 PM
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RT-MT800 is a Deore series rotor for mountain bikes. Not Ultegra. Did you mix up the number? Or is RT-MT800 what you are actually asking about?

Here is the current compatibility chart from Shimano.
https://productinfo.shimano.com/#/co...460&acid=C-461

Probably best to go in on what ever your brake caliper model is and then look at the rotors that are supposed to be compatible with it. If your stuff is older than this, then look in the archive which is a link at the top.
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Old 09-23-22, 04:05 PM
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ANY rotor that's the same size and attachment method will work. You could use SRAM or whatever if that's all you could find.
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Old 09-23-22, 04:15 PM
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bikeme
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Originally Posted by Iride01 View Post
RT-MT800 is a Deore series rotor for mountain bikes. Not Ultegra. Did you mix up the number? Or is RT-MT800 what you are actually asking about?

Here is the current compatibility chart from Shimano.
https://productinfo.shimano.com/#/co...460&acid=C-461

Probably best to go in on what ever your brake caliper model is and then look at the rotors that are supposed to be compatible with it. If your stuff is older than this, then look in the archive which is a link at the top.
Thanks for the chart!! I was asking about the RT-MT800 as it was marked compatible on an online store. I see is is compatible on the chart as well even though a "mtb" rotor. It looks like Shimano has introduced a new road rotor to replace the SM-RT800 called RT-CL800 in Ultegra, or in Dura Ace, the RT-CL900...
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Old 09-23-22, 05:41 PM
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Originally Posted by cxwrench View Post
ANY rotor that's the same size and attachment method will work. You could use SRAM or whatever if that's all you could find.
That's pretty much it. As long as the diameter and attachment method (6-bolt or Centerlock) match it will fit. Another consideration is pad compatibility. Some rotors are specified for resin pads only while others allow metallic or semi-metallic pads also. Finally, more elaborate rotors have light weight centers, cooling fins, and other enhancements while less expensive rotors are just a stamped one piece disc.
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