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Effective heat dispersion on long descents.
The Shimano Dura-Ace SM-RT900 Rotor prevents brake fade on extended descents where you'd normally experience a major decrease in stopping power on the road. This Freeza Rotor is part of Shimano's newest Dura-Ace hydraulic disc brakes, meaning they're compatible with the Dura-Ace BR-R9170 caliper and Ice-Tech pads. They're compatible with frames that accommodate flat-mount disc brakes and attach to Shimano's proprietary Centerlock hub system.
The 3-layer rotor construction has a stainless steel braking surface with an alloy core featuring finned cut-outs for effective heat dispersion. Shimano claims heat is reduced by up to 50-degrees Celsius, which is significant when you're riding along mountainous terrain where sustained descents pose a threat to your stopping power.
- FREEZA rotor reduces heat by up to 50-degrees Celsius
- 3-layer construction dissipates heat on long descents
- Stainless steel braking surface with aluminum core
- Shimano Centerlock attachment with included lock ring
- Compatible with Dura-Ace BR-R9170 disc brake caliper
- Recommended for use with Shimano Ice-Tech brake pads
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Reviews & Community
REVIEWS
Ian GonderGearhead
Avg. ride time: 8h 19m per week- Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.
Stoppin' not droppin'
- Familiarity: I've used it several times
These rotors are sweet. They have everything you need on a road bike, good looks with even better performance. I installed these on my S-Works Tarmac Disc and couldn't be happier. We live in Utah and descend a lot, they stop well, are silent and true. Highly recommend these due to form and function. Please let me know if you have questions. igonder@competitivecyclist.com
Ian GonderGearhead140 front and rear. just fine for me, i weigh about 152 pounds
Sergio S.Ian, I have a S-Works Tarmac Disc 2015 and it's only a matter to change the rotors? The calipers and shifters are the same? Tks
ForrestGearheadBaller Status
- Familiarity: I've put it through the wringer
Running Dura-Ace brakes? You need Dura-Ace rotors, duh!
Shimano has really put emphasis on heat management at the rotor level and it is very cool to see how the technology has advanced. These new Dura Ace rotors do an excellent job of dumping heat on long descents that require lots of hard braking.
m@mp1150107Are you using the 140 or 160mm rotors?
ForrestGearhead140mm Rear, 160mm front. If you are a super light rider, avoid long steep descents, or are a weight weenie you could do 140 Front and Rear but I opted for the added power of a 160mm front.
Steven SheffieldGearheadAwesome rotors.
- Familiarity: I've put it through the wringer
I feel a little silly using Dura Ace rotors on an Ultegra-equipped gravel bike, but what the heck. You only live once, right?
Fantastic stopping power, and the extra large fins do a great job of helping dissipate heat when braking a lot on long, steep descents.
Andrew K.Can I use these with a SRAM Red eTap HRD setup?
Steven SheffieldGearheadCan you? Yes. Should you? Not really. SRAM & Shimano pads are shaped differently, and thus will contact the rotors differently. You may end up with a pad that’s only 90% in contact with the rotor or which pulses under braking ... but they will work in a pinch.
Ron R.Yes, they will work fine.
Calvin B.Dura ace rotors
- Familiarity: I've used it several times
I’m not new to road bikes but I am definitely new to road disc brake bikes. I purchased these rotors because my Schramm rotors were bending therefore causing break r I purchased these rotors because my Schramm rotors were bending therefore causing break rub. After stalling these door is rotors I found I have no brick road and structurally sound and the stopping power and performance is superior to anything that I have ever experienced and wet or dry conditions I recommend these rotors to anyone
Are you using the 140 or 160mm rotors?