Less Heat + More Stopping Power = Better Braking
Disc brakes have rightfully become the contemporary standard across all major cycling disciplines thanks to superior stopping power, nuanced modulation, and reliable all-weather performance, and the Shimano XT/Ultegra RT-MT800 Centerlock Disc Rotor features new technology to take that performance up a notch.
Shimano's Ice Tech Freeza technology means this rotor is able to cope with sustained braking and high temperatures associated with both road and mountain biking. Shimano's advanced Freeza heat-dissipating design reduces brake fade. Installing and removing the rotors is quick and easy thanks to Shimano's proprietary centerlock design.
Features:
- XT/Ultegra series disc rotor for reliable stopping power in all conditions
- Maximum heat dissipation thanks to Ice-Tech Freeza technology
- Available in 140, 160, 180, and 203mm sizing
- Available in internally or externally splined versions
- Centerlock hub compatible
- For use with road, gravel or MTB disc brake systems
*NOTE: Internally splined variants are for use with 12mm thru axles. Externally splined versions will be for use with 15mm and 20mm axle diameters.
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.
Ordered by Most Relevant First
5 stars
4 stars
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1 stars
Reviewed 1/20/2023
by Anonymous
Cycling Enthusiast
Chicago USA
Value Rating
Overall Rating
Great braking and looks better than previous version
Was looking to get new rotors for CX/Gravel bike and this version of the XT rotor was exactly what i was looking for as didn't need the extra weight of the cooling fins from the road specific versions.
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Reviewed 12/19/2022
by Joseph Coleman
Bend, Oregon
Great rotors
Shimano comes through again . Wonderful, precise product. I'm a loyal Shimano customer.
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Reviewed 12/9/2022
by Andrew
Competitive Racer
Chicago USA
Value Rating
Overall Rating
Great braking and less material than previous version
Needed additional rotors for a new (to me) wheelset. Have used the previous model of the Ultegra rotors and whilst they were great, i really like the move back to a more open design approach. Takes me back to my first disc MTB 20 years ago!
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Reviewed 8/9/2022
by Anonymous
Cycling Enthusiast
Near Birmingham, AL
Value Rating
Overall Rating
Shimano Ultegra RT-MT800 Disc Rotors are strong and smooth
The Shimano Ultegra RT-MT800 Disc Rotors perform really well. Breaking is quiet and strong. I have tried them on roads with long and fast down hills in the heat of the summer and they perform really well and never overheat. I was BTD had it in stock, the price was better than other stores, and I could earn points for future purchases. Shipping was immediate and trackable.
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Excellent rotor for road use.
Great rotor. Preformed well in all conditions wet/dry. Works well with metallic or resin pads. Would definitely buy these in the future.
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Reviewed 12/27/2019
by Anonymous
Daily Commuter
Value Rating
Overall Rating
5 of 5 customers found this review helpful.
Lightweight, slightly lighter than the Shimano road rotors, used on a road bike
Weight weenie wise, this rotor is lighter than the XTR version and lighter than the Ultegra and Dura-ace versions. This is why I got it. Works well on my road bike paired to Ultegra R8000 shiftercaliper. I'm using 160mm front140mm rear.
What else can I say? It works as intended.
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2 of 3 customers found this review helpful.
Sintered pads!
Finally upgraded bike from resin-only to sintered compatible discs. Working well and no squeals in the first couple hundred miles, even in the wet. These look pretty rad, too.
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Reviewed 11/23/2022
by gshb
Cycling Enthusiast
Portland
Good rotor
Roughly same weight as the XTR while being almost a third less costly. Have 2 pairs and have needed to do a little truing to eliminate rubbing, but no big deal.
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