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Shimano
Dura-Ace SM-RT900 Disc Brake Rotor

Mfg PartNum:
$81.99
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The Shimano Dura Ace SM-RT900 Disc Brake Rotor has an aluminum core that lowers temperatures by up to 30°C compared to the previous RT99 design. This advancement in cooling technology means it works flawlessly with Dura Ace 9170 road calipers for a lightweight system that doesn't compromise on heat management.

Centerlock mount. Available in multiple 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.

 

Brake Pad Type: Disc 

 

Brake Type: Disc 

140MM - Centerlock

Mfg PartNum: ISMRT900SS1 

160MM - Centerlock

Mfg PartNum: ISMRT900S1 

Ordered by Most Relevant First
5 stars
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1 stars
(15)
(2)
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(1)
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(11%)
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stop well but wear quickly
by Karl
Cycling Enthusiast

I live in an area with lots of topography so am descending often. 185 pounds. Going to try the Ultegra rotors when I have to replace. As always great prices and fast shipping with Western.

Reviewed 8/31/2020
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These rotors seem to respond quicker, and are quieter than my previous ones.
by gregp
Cycling Enthusiast
Chehelam Mountain, Yamhill County

I put these on my Specialized Roubaix road bike. I ride a lot of hills around my house in Yamhill county and they are more responsive and quieter than my previous rotors on steep downhill stopping.

Reviewed 9/24/2020
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DA is worth it-but mostly for the looks
by GDS PDX
Cycling Enthusiast
Portland, Oregon

I recently had to replace my rotors. The original equipment was Ultegra, but I always thought that the black interiors of the DA's were jsut cooler looking. According to the literature, they are slightly lighting and the black brake fins disperse heat better. That may be the case, but I can't say that I really saw a performance difference. But the DA upgrade was only a few bucks more, and they do really improve the look in my opinion. Usually, I would opt for performance over looks or cost, but in this case I'll probably always stick with the DA's.

Reviewed 5/21/2020
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Nice and easy upgrade
by Lou P.
Competitive Racer
Fruita, CO

I replaced an old set of XT rotors with these on my CX bike. Not sure if they are lighter, but they do seem to cool faster, and the brakes are strong and fade free, even after extended use.

Reviewed 10/10/2020
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Not so great...
by Anonymous
Cycling Enthusiast
Midwest

I installed these on my Trek Domane carbon and they look awesome! However, they squeal, bad!! Imagine an old school bike horn every time you try to stop. I pulled a Fred Flintstone stop on a few occasions just so I don't scare a dog or a child on the trail.

Reviewed 8/4/2020
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Looks great, does the job
by Riding in Chicago
Cycling Enthusiast
Chicago, Denver

How would an individual rate something like this?

Are we equiping the same bike with 6 different rotor combos and rolling the same rider down the same hill and evaluating single and repeated stopping efforts?

So the rotor looks great and does not squeal as much as the RT81 (with the same pads).

Until some outfit (Bike Radar, et. al.?) does a comprehensive test, if you want shimano, get ICE Tech and buy based on price and what aesthetic you like, bc the Ultegra version looks good as does the original RT99.

Reviewed 5/3/2019
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Numba 1 Stunna
by Michael M
Portland

These are so sexy. You are guaranteed to get air when you send it in these baddies. Can also be used to cut various animal and vegan cheeses. Stay blessed.

Reviewed 7/13/2020
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They look great, work great!
by Anonymous
Competitive Racer
Middle Tennessee

These disks provide excellent stopping power and modulation. They last a long time.

Reviewed 9/24/2018
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Good Product Good Prices!
by Puntyboy
Marin County, CA

I put these on my gravel bike they work very well. They are 140 mm and I am 210 pounds and they get the job done. I have another gravel bike with the same frame and fork but a different setup. It has 160 mm rotors and of course that has more stopping power but it's a different bike for a different purpose. If you are running 140's then these are the rotors for you.

Reviewed 1/11/2020
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Full DA bike - this is just the best you can get
by Anonymous

There are lighter but there none better....light, heat tolerant, and very well designed. The best.

Reviewed 12/26/2019
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The Best
by Dn. Drew
East Village, Ca

Well worth every penny. These babies make it hard to get back on aero bike with rim brakes.

Reviewed 4/3/2020
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Great road discs
by CL
Blacksburg, VA

Truth be told, do you really need dura ace discs? Probably not but they sure look good. Braking performance seems just as good as ultegra discs but with the black finish. Definitely not disappointing and at a good price too.

Reviewed 4/4/2019
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Best Rotor for Road Disc on the market
by Anonymous
1 of 1 customers found this review helpful.

These rotors add a level of detail to my bike that no other rotor on the market can.

I am very happy with the product.

Reviewed 6/13/2018
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Brakes firmly
by Anonymous
Cycling Enthusiast

Black rotor combines with most colors of your bike. Installed 160 mm on the front wheel and 140 mm on the rear one. Feels very secure.

Reviewed 8/15/2019
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pefrect
by Anonymous
3 of 3 customers found this review helpful.

Great fit. Came with lock rings. Lifht and good looking for discs.

Reviewed 12/18/2017
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Stopping power
by Anonymous
San Diego

I find that this disc keeps it shape very well meaning that it has not bent or worp and has lasted a long time.

Reviewed 6/6/2019
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Best disc rotor on the market
by Anonymous
Cycling Enthusiast
MD

The only rotor that doesn't squeak in the rain.

Reviewed 5/17/2019
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Light weight good braking surface.
by Anonymous
Cycling Enthusiast
Sierra Vista, Arizona

Very good rotor. I would have preferred all black or all silver.

Reviewed 5/17/2019
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