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Shimano Dura-Ace RT-CL900 Disc Rotor
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Shimano Dura-Ace RT-CL900 Disc Rotor

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Description

Quieter Control For Any Terrain

The Shimano RT-CL900 Disc Rotor is a Dura-Ace level rotor that brings a focus on decreasing heat deformation resulting in quieter than ever braking performance without sacrificing weight or heat dissipation. These rotors are quieter than ever, but with superb, consistent braking performance on any long, steep descents thanks to excellent heat dissipation.

Features:

  • New arm shape is more robust, leading to quieter operation
  • Heat dissipation paint boosts performance
  • Available in 140 mm & 160 mm
  • Centerlock
  • Internal lockring

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.

Specifications

 

Brake Type: Disc 

 

Brake Pad Type: Disc 

 

Hub Compatibility: Center-Lock 

 

Brake Parts: Rotor 

140mm - Centerlock

Mfg PartNum: IRTCL900SSI 

160mm - Centerlock

Mfg PartNum: IRTCL900SI 

Reviews

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Quality rotor for excellent brakes
rating
by Anonymous
Cycling Enthusiast
Sparks, NV
3 of 3 customers found this review helpful.

2017 Specialized Roubaix just passed 38,000 miles and this is the third back rotor for the bike. I live in Sparks, Nevada, and enjoy many significant downhill decents in the area. Good braking is a necesity when decending from Ebbetts and Monitor Passes, and I find these rotors prevent brake fade. I weigh 200 lbs and the back rotor is only 140 mm so it gets severly punished. I stayed with the Dura Ace model as I prefer black to the silver of the Ultegra version. It will last for several years so I am willing to pay a little extra. Overall a good rotor.

Reviewed 7/24/2023
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Better then old Dura Ace
rating
by Sirbike2
Cycling Enthusiast
Portland, OR

These don't seem to suffer from the heat warp that the old dura ace rotors did. They are great

Reviewed 7/6/2023
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Good looks and known quality
rating
by Daniel
Cycling Enthusiast
Per�

Bought this to replace my stock ultegra rotors. Can't seem to perceive the improved heat management but my comparable XTR rotors on XC bike seem to last forever. Also, bling factor was main decision driver, now I get a lot of "WOW where did you get that?" that add a couple more watts to my rides. Would recommend.

Reviewed 5/2/2024
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Descend with confidence
rating
by ChanS
Cycling Enthusiast
Cincinnati OH
1 of 1 customers found this review helpful.

I'm very late to the disc brake party. I've had a decent commuter bike with discs and appreciated how big a difference they made versus rim brakes, especially in wet weather but my commute doesn't really stress out the system. I recently bought a speedy Italian bike, though, and decided to pick it up over there and tour the Dolomites then hit the Alps. I can't say enough about how much better descents are with these. Excellent stopping power, smooth modulation, no noise, and no issues even as I got more and more aggressive.

Reviewed 1/17/2024
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A major improvement over original disc
rating
by Horsefeathers25
Cycling Enthusiast
Albuquerque, NM

Replaced my Ultegra discs with these new version Shimano Dura Ace discs after Ultegra disc were used up.

These Dura Ace disc were absolutely flat, no variation from true within the brake pads.

Very pleased with their performance.

Reviewed 9/7/2023
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Great rotor
rating
by Jim
Florida

Nice stopping, low noise.

Reviewed 12/4/2023
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Typical high quality from Shimano
rating
by Gary B
CLEARFIELD

New, cleaner look with typical Shimano reliability.

Reviewed 10/1/2023
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Fast and reliable
rating
by Anonymous
Clermont Florida
1 of 1 customers found this review helpful.

These are awesome rotors. Tried them on steep downhill descents and they were amazing and stopped solidly. Best rotors i have of all my bikes

Reviewed 9/28/2023
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Top notch looks and performance with the latest Dura-Ace rotor
rating
by MW
Canada

Great and lightweight Dura-Ace rotor. Seems to have an improved design to prevent warping, though I haven't experienced any warping on prior generations. Great quality as always from Shimano

Reviewed 4/28/2023
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Excellent Shimano quality
rating
by Roger
Cycling Enthusiast
Portland OR

Used this to replace my front rotor, which had worn thin. Works great!

Reviewed 12/8/2022
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