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Shimano Dura-Ace SM-RT900 Disc Brake Rotor

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$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: ISMRT900SS 

160MM - Centerlock

Mfg PartNum: ISMRT900S 

Ordered by Most Relevant First
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Reviewed 8/4/2020
by Anonymous
Cycling Enthusiast
Midwest
Value Rating
Overall Rating
Not so great...

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.

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Reviewed 5/3/2019
by Riding in Chicago
Cycling Enthusiast
Chicago, Denver
Value Rating
Overall Rating
Looks great, does the job

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.

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Reviewed 1/11/2020
by Puntyboy
Marin County, CA
Overall Rating
Good Product Good Prices!

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.

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Reviewed 12/26/2019
by Anonymous
Value Rating
Overall Rating
Full DA bike - this is just the best you can get

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

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Reviewed 4/3/2020
by Dn. Drew
East Village, Ca
Overall Rating
The Best

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

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Reviewed 9/24/2018
by Anonymous
Competitive Racer
Middle Tennessee
Value Rating
Overall Rating
They look great, work great!

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

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Reviewed 8/15/2019
by Anonymous
Cycling Enthusiast
Value Rating
Overall Rating
Brakes firmly

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.

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Reviewed 8/10/2018
by HEB
Competitive Racer
San Jose, Ca.
Value Rating
Overall Rating
0 of 2 customers found this review helpful.
Replaced new Bad disc on purchased bike.

Had to buy a new disc because a bad disc was sold with my new bike. Shimano wanted three weeks to send in the bad disk before they would replace it. I decided to buy one because I didnt want my bike not rideable for the 3 weeks. They did replace it after the 4th week so now I have a spare. Thank you Bike Tires Direct for a quick ship time. I rate BTD 5 stars.

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Reviewed 6/13/2018
by Anonymous
Value Rating
Overall Rating
1 of 1 customers found this review helpful.
Best Rotor for Road Disc on the market

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.

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Reviewed 5/17/2019
by Anonymous
Cycling Enthusiast
MD
Value Rating
Overall Rating
Best disc rotor on the market

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

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Reviewed 5/21/2020
by GDS PDX
Cycling Enthusiast
Portland, Oregon
Overall Rating
DA is worth it-but mostly for the looks

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.

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Reviewed 7/13/2020
by Michael M
Portland
Overall Rating
Numba 1 Stunna

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.

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Reviewed 4/4/2019
by CL
Blacksburg, VA
Overall Rating
Great road discs

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.

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Reviewed 6/6/2019
by Anonymous
San Diego
Overall Rating
Stopping power

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

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

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

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Reviewed 12/18/2017
by Anonymous
Overall Rating
3 of 3 customers found this review helpful.
pefrect

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

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