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Shimano Dura-Ace SM-RT900 Disc Brake Rotor Shimano Dura Ace SM-RT900 Disc Brake Rotor
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Shimano
Dura-Ace SM-RT900 Disc Brake Rotor

Mfg PartNum:
  (22 customer reviews)
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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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(19)
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Great product. Looks killer and does the job
rating
by Anonymous
New York

Nothing else to say other than Dura Ace ftw

Reviewed 7/5/2021
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stop well but wear quickly
rating
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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DA is worth it-but mostly for the looks
rating
by GDS PDX
Cycling Enthusiast
Portland, Oregon
1 of 1 customers found this review helpful.

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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These rotors seem to respond quicker, and are quieter than my previous ones.
rating
by gregp
Cycling Enthusiast
Chehelam Mountain, Yamhill County
1 of 1 customers found this review helpful.

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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Nice and easy upgrade
rating
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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Numba 1 Stunna
rating
by Michael M
Portland
1 of 1 customers found this review helpful.

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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Great road discs
rating
by CL
Blacksburg, VA
1 of 1 customers found this review helpful.

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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pefrect
rating
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
rating
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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Light weight good braking surface.
rating
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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Rotors to match my Enve's
rating
by moparspanky
Cycling Enthusiast
Eugene, OR

Bought a set of Enve SES AR 3.4 disc wheels and wanted a nice rotor to match the black on black color scheme: flat black hoops, gloss black decals and hubs (Chris King), so yeah need those gloss black rotors to match right?

Reviewed 5/7/2021
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They Look (Dura) Ace
rating
by Andrew R
Cycling Enthusiast
Boulder, CO

Let's be honest. Do most of us need TDF level stopping and cooling power? No. Are the Ultegra rotors not good enough? No...

Do these rotors with the black paint look amazing. Yes. Are they the best money can buy. Yes.

So, why not! How often do you buy rotors... :-)

Reviewed 3/18/2021
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Best rotors
rating
Competitive Racer
canada

Awesome rotors! they look great with great stopping power

Reviewed 3/15/2021
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Looks great, does the job
rating
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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Not so great...
rating
by Anonymous
Cycling Enthusiast
Midwest
0 of 1 customers found this review helpful.

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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They look great, work great!
rating
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!
rating
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
rating
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
rating
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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Best Rotor for Road Disc on the market
rating
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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