The Shimano Ultegra SM-RT800 Disc Rotors feature Shimano's Ice-Tech Freeza construction, taking a hybrid of steel and aluminum. For consistent braking performance, even over extended periods of braking, the Ultegra SM-RT800 rotors rapidly to reduce overall temperatures by 50ºC. The all-new design provides better heat dispersion than current road disc systems, with superior heat management over current Ice Technologies Freeza offerings from Shimano.
The Shimano Ultegra SM-RT800 Disc Rotors are Centerlock compatible. Available in two sizes: 140mm and 160mm.
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.
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Reviewed 6/22/2020
by B''ham Biker
Bellingham
Works to slowstop the bike.
Works well, however after a month or so, starting to have a slight squeal. Not too bad so far.
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Reviewed 6/19/2020
by Anonymous
Cycling Enthusiast
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A big upgrade from the original rotors.
Use these are my road bike for all outdoor riding. Great on quick stops even after riding through some puddles. I would definitely purchase again.
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Reviewed 5/9/2020
by Anonymous
Cycling Enthusiast
NYC
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Overall Rating
Nice new design
Love the new design. Performance is excellent. No complaints. Maybe slightly less aero from the side? Seems like the old design had more cutouts that might catch crosswinds less... but I have no scientific date to back this up.
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Just what I needed at the right and
Building up a spare road disk wheelset on a budget, and BTD was the best price found. Delivery was on time. Well packaged. Now I can handle emergency wheel changes with the spin of the thru axle.
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Reviewed 4/15/2019
by LLaud
Competitive Racer
West Virginia
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Great Product!
Nice finish with great stopping power!
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Reviewed 11/21/2019
by Anonymous
Cycling Enthusiast
Boulder, CO
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Overall Rating
Not much to say Ultegra quality, as expected
Mounted on a gravel bike that sees a fair bit of road use. Easy to install, no issues. Didnt think the Dura Ace version was worth the extra for a few grams weight savings.
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Reviewed 3/25/2018
by Ivan’s Helix Pro TI
Cycling Enthusiast
Cedar Park, Texas
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0 of 10 customers found this review helpful.
The best customer service I have found
I have ordered complete SRAM RED e-tap HRD, including SRAM Red Crankset 5236. I have been delighted with biketiresdirect.com price and and speed of order fulfillment. I ordered on Friday evening and my order arrived Tuesday morning even thought I am in Austin, Texas area and without paying extra shipping fees. While I have been waiting on my new Helix Pro TI frame from Lynskey, I ordered for about $500,00 tools for bike. Again, help with order, order execution and shipping, every thing went so smoothly with biketiresdirect.com that it was a joy to order from them. One time I hade to modify my order before shipping, and after receiving, I had to return 2 items. Both times, every thing went flawlessly. Even better, biketiresdirect.com sent me replacement part immediately and I got it next day and then in the same box I sent back the original part. All that with no extra charge. I really love and enjoy my Lynskey bike. To build a bike yourself, believe me, its a big project. But with help I have received from biketiresdirect.com, specifically Nathan, it was a joy and a memorable experience. I will recommend them to my friends, other fellow rider and every one else whos in need of anything for bike. I give them 5 stars only because thats the max available. Believe me, they deserve at least 10 stars.
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Reviewed 5/16/2019
by Dan
Cycling Enthusiast
Allyn, WA
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Excellent disc rotors
Typical outstanding Shimano quality. Great braking control and modulation.
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Excellent product
Excellent product. I feel confident when stopping. It arrived quickly.
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Reviewed 5/13/2019
by Anonymous
Cycling Enthusiast
Hillsboro, OR
Great stopping power
When one of my rotors was fouled with hydraulic fluid I upgraded both to Ultegra. They work very well and the center lock design makes them very easy to install with just a cassette tool and chain whip.
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Reviewed 3/26/2019
by Caboose
Competitive Racer
Raleigh, NC
great disc for the price
These rotors are perfect for those not willing to cough up the extra for the SMRT900s.
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