Signin to Your Account
Questions? Call our tri Specialists! 1-800-445-4790


Product Images

Shimano Ultegra RT-MT800 Disc Rotor Centerlock
Click to zoom

Shimano Ultegra RT-MT800 Disc Rotor Centerlock

Pricing and Order Section

Mfg PartNum:
(2 customer reviews)
Earn $1.68 in Podium Club credit. Click to Learn More.
MSRP: $55.99
In Stock Now
This size is not eligible for Podium Club points
Price matches are is not eligible for Podium Club points
Qualifies for Free Shipping!


Less Heat + More Stopping Power = Better Braking

Shimano Ultegra RT-MT800s are compact and lightweight disc brake rotors that feature rapid heat dissipation thanks to Ice Technologies FREEZA heat management system. Installation and removal is quick and easy with Shimano's centerlock design.

Shimano's Ice Tech Freeza technology means this rotor is able to cope with sustained braking and high temperatures. Shimano's advanced Freeza heat-dissipating design reduces brake fade.

Internal Lockrings install with a cassette tool and fit most 12mm thru axles. External lockrings install with a bottom bracket tool and fit all axles up to 20mm.


  • Ultegra series disc rotor for reliable stopping power in all conditions
  • Maximum heat dissipation thanks to Ice-Tech Freeza technology
  • Available in 140 or 160mm sizes
  • Available in internally or externally splined versions
  • Centerlock hub compatible
  • For use with road, CX, or gravel disc brake systems

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.



Brake Pad Type: Disc 


Brake Parts: Rotor 


Brake Type: Centerlock disc 


Hub Compatibility: Center-Lock 

140mm - Centerlock (Internal Spline Type)

Mfg PartNum: IRTMT800SSI 

160mm - Centerlock (External Spline Type)

Mfg PartNum: IRTMT800SE 


Ordered by Most Relevant First
5 stars
4 stars
3 stars
2 stars
1 stars
Great quality and no second thoughts about your safety
by S Nelson
Daily Commuter
DuPont, WA

These rotors are really nicely built, they look very nice and I never worry about the rotor failing to stop me. they last a long time. I have used these since they came out and have never had any issues with them.

Reviewed 9/11/2023
Was this review useful to you? Yes/No
Thank you for your feedback.
by Anonymous
Cycling Enthusiast
Portland, OR

Excellent rotor as always from Shimano. Appreciate the little refinements to reduce weight.

Reviewed 7/17/2023
Was this review useful to you? Yes/No
Thank you for your feedback.
additional content loading
additional content loading
additional content loading