Description
Quieter Control For Any Terrain
With a focus on decreasing disc brake rotor heat deformation, the result of The Shimano Ultegra RT-CL800 Disc Rotor is quieter than ever brake performance without sacrificing weight or heat dissipation.
Features:
- Superb, consistent braking performance on any long, steep descents thanks to excellent heat dissipation
- New arm shape is more robust, leading to quieter operation
- Rotor size: 140 mm, 160 mm
- Centerlock
- Internal lockring
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.
Reviews
Ordered by Most Relevant First
5 stars
4 stars
3 stars
2 stars
1 stars
Reviewed 5/1/2025
by Guy who likes stopping
Cycling Enthusiast
Western Washington
Value Rating
Overall Rating
It makes you stop
These rotors are great. They are quiet and have great bite with Shimano pads and calipers. I'm sure they have good cooling (not that I've ever had issues with warped rotors). Oh yeah and they stop great in the wet too. They are the same thing as Dura Ace rotors without the black paint. What more could you ask for?
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Reviewed 9/23/2024
by Anonymous
Cycling Enthusiast
SF Bay Area
Value Rating
Overall Rating
Might be an upgrade from 105
Thought I had a warped rotor, but I was wrong.While I was waiting for the Ultra rotor to arrive I carefully cleaned the old 105 rotor which fixed the pulsing issue. Since the Ultra rotor had arrived, I went ahead and put it on. Easy installation, you use the same tool as the you use to take off the freehub.
Does it work better than the 105? Who knows? Either one stops the bike. Kinda looks nicer, though.
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Reviewed 1/19/2024
by Gjbiker
Cycling Enthusiast
Grand Junction, CO
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1 of 1 customers found this review helpful.
Great rotor
My road bike rotors were getting thin enough to replace. My bike shop recommended I shop online and bring them in. It was cheaper and fast to order through Bike Tires Direct than for my LBS to order. They arrived quickly and exactly the part needed to replace on my Specialized bike.
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Reviewed 9/21/2023
by Steve
Cycling Enthusiast
Ohio
Value Rating
Overall Rating
8 of 9 customers found this review helpful.
Comes with lock ring and washer
The rotor is great, got them to add to a set of Shimano carbon wheels. Lined up perfectly, strong, quiet braking. The description doesn't mention it, but you do get the lock ring and washer with it.
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Typical quality Shimano product
Product does what it is supposed to do and looks good doing it.
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Reviewed 7/25/2024
by Wambwaze
Southern New England
Tremendous
Great product + Good sale price = GO!
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Quiet, durable
Have had these on multiple bikes for thousands of miles with no complaints.
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Reviewed 8/7/2023
by mjgates01
Cycling Enthusiast
North Carolina
Value Rating
Overall Rating
4 of 4 customers found this review helpful.
Newest Gen Shimano Rotors a Decent Upgrade
These new ultegra rotors seem to do better in the crosswinds and on the noise compared to my old Ultegra. They seem less susceptible to fade as well on long descents. Recommended if you're updating brake pads or calipers.
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Reviewed 5/24/2024
by Anonymous
Cycling Enthusiast
Seattle, WA
Value Rating
Overall Rating
1 of 1 customers found this review helpful.
Excellent product and delivered quickly.
Needed a set of rotors for my second wheelset. I wanted to keep the components the same. Excellent rotors.
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Reviewed 10/24/2023
by Anonymous
Cycling Enthusiast
Ashburn, VA
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2 of 2 customers found this review helpful.
It works. I have no issues with the Shimano Ultegra RT-CL800 Disc Rotor thus far.
The rotors are used on an All-Road bike, mainly go on (pavement) trails and on occasions off-road on hardpack gravel.
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Reviewed 6/8/2023
by RidingDirty
Competitive Racer
East Bay, CA
Value Rating
Overall Rating
1 of 1 customers found this review helpful.
Works great!
Replaced my gravel bike shimano disc brake rotors with these. Work great. Nice and quiet and quick stopping. Easy to install.
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Reviewed 5/13/2024
by Michigander
Competitive Racer
Ann Arbor
1 of 1 customers found this review helpful.
Super happy with the quality
Added these rotors to a new wheelset I was running these rotors on my "stock" setup, and I have found them to be very reliable. They were easy to install, and they work just as I had expected. Reliable, Shimano quality. No issues.
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Reviewed 10/31/2024
by NC Rich
Cycling Enthusiast
Tryon, NC
Quality brake disc with Shimano reliability
Perfect replacement for my GRX rotor
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Reviewed 6/6/2024
by PDX Oli
Competitive Racer
Portland, OR
Great product
Great rotor for the front wheel.
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1 of 2 customers found this review helpful.
Stop me every single time.
Compatible with my 105 system. Easy to install. These rotors work exactly as they are supposed to'.I have yet to crash because the brakes did not brake. They look aero too. Probably made me faster. Probably saved me 0.125 watts. Zoom.
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0 of 2 customers found this review helpful.
Stop me every single time.
Compatible with my 105 system. Easy to install. These rotors work exactly as they are supposed to. I have yet to crash because the brakes did not brake. They look aero too. Probably made me faster. Probably saved me 0.125 watts. Zoom.
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1 of 1 customers found this review helpful.
Worked great and easy to change
Now I can stop on hills changing from 140 dia to 160 dia.
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