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ShimanoXT RT-MT800 Centerlock Disc Rotor


Item # SHIU18K

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  • Silver, 203mm ($67.99)
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Item # SHIU18K

Why We Like The XT RT-MT800 Centerlock Disc Rotor

Bike progression has been forging ahead full-speed for some time now, and with all of the progress we see in bike geometry, riders are tackling the trail faster than ever. While this certainly is exhilarating when you've got the trail to yourself and you're booking it into banked berms, it also means you've got to dial in the ability to stop on a dime, should you come up on a climber working their way up the trail. Shimano's XT RT-MT800 Centerlock Disc Rotors are built to do just that, with Ice Technology and a deeper disc area to manage heat than an all-steel rotor can on its own. This tech combines an aluminum core sandwiched between steel extensions to provide better heat dissipation. This rotor is then paired up to an aluminum carrier, which further cools things down. This year's version ads in a tapered fin to help boost heat dissipation, and reduce fade, enabling better modulation and stopping power under pressure. The rotors are compatible with centerlock hubs only, and are available in a huge range of sizes to accommodate your gravel rig to enduro machine, and everything in between.

  • Drop heat and stop on a dime with Shimano's XT rotors
  • Ice-Tech sandwiches aluminum with steel to drop heat
  • Aluminum carrier spider further reduces heat
  • Fins draw heat inwards and away from braking surface
  • Compatible with centerlock hubs only

Tech Specs
Material[rotor] steel, [carrier] aluminum
Attachment Typecenterlock
Compatibilitycenterlock wheels
Diameter140mm, 160mm, 180mm, 203mm
Activitymountain biking
Manufacturer Warranty2 years

Actual Weight

Silver, 203mm

Claimed Weight

Claimed weights are provided by the vendor.

Have questions? Chat with a Gearhead

[140mm] 3.1oz (89g), [160mm] 3.8oz (108g), [180mm] 4.6oz (131g), [203mm] 5.2oz
89g), [160mm] 3.8oz (108g), [180mm] 4.6oz (131g), [203mm] 5.2oz (147g

Actual weights are measured in-house by the Competitive Cyclist team.

Have questions? Chat with a Gearhead

What do you think about this product?


>Rating: 5

Great Brakes

I've put it through the wringer
True to size

I have these on my gravel bike right now and they provide great stopping power and hold up great.

>Rating: 5


Threw on my TCR at the recommendation of the good folks at CC. Great stopping power, Ice tech, superb weight, look great, nice upgrade. What more can you ask for!

>Rating: 5

Works great just like XT

I've put it through the wringer

Looks great on any bike. Seems to cool itself down well. Got the 160mm one which has 4 spider arms (not 5). If you are confused like myself: XT got silver rotor, silver fins, black spider. XTR got silver rotor, black fins, black spider.


What type of lockring does this come with - internal-tooth or external-tooth (15mm thro axle)?


Does this rotor come with a lockring?



Which lockring? External (bottom bracket socket) or internal (cassette socket)?

Hey Dmitry, The spline on the Shimano Lockring is the same as a Shimano Cassette, so you can use any Cassette Tool matched for a Shimano Cassette. One of my favorites is the Abby Bike Tools Dual Sided Crombie. That will work for SRAM, Shimano, and Campy! If you have any other questions, please feel free to email me directly at Thank You for your question!

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