Shimano XT M8100 RT-MT800 Disc Brake Rotor

Shimano XT M8100 RT-MT800 Disc Brake Rotor
69 reviews
Packaging
Length
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Toothing Lockring
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From 40,61 13,26 discount
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  • Free tracked shipping over 99,00€

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Pros & Cons

Pros & Cons

  • The heat dissipation of this brake disc is very good by Shimano's Ice-Technology Freeza.
  • Due to the harder material, this brake disc can also be used with Semi-Metallic and metallic brake pads.
  • This brake disc is made of light materials and therefore has a low weight.
  • You can choose different sizes of locking rings with this brake disc, so you don't have to buy extra lock rings with a 15 mm through-axle.
  • These brake discs deform relatively little when heated, and are therefore less likely to seize.
  • This brake disc is slightly heavier than the XTR MT-900 brake disc.
Read more on what our customers have to say about this product

Specifications

Specifications

Brand
Shimano
Bike Type
Roadbike / Gravel & CX Bike / MTB / E-MTB / City Bike & E-bike
Mount
Centerlock
Hardness of brake pads
Hard (Metal) / Medium (Semi-Metal) / Soft (Resin/Organic)

Description

Description

The Shimano XT RT-MT800 brake disc is a low weight disc with optimal heat dissipation and is designed to maximize your braking performance!

Hard material, optimally milled
The components of this disc are milled out of hard materials. This allows you to ride with harder brake pads than just the traditional Shimano Resin brake pads. Harder pads do not heat up as fast in long descents and have a higher durability.

Low weight
Shimano has done its best to keep this brake disc's weight as low as possible, without compromising its functionality. With this disc, you won't have to waste power lugging extra grams up hill while experiencing enough braking power going downhill.

Lockring variants
This brake disc is available in all sizes with a lockring that has internal teeth. This lockring is tightened with a cassette tool and is compatible with quick-release axles, as well as with 10 mm and 12 mm spindles.
This brake disc is also offered with a lockring with external teeth. This lockring is tightened with a bottom bracket tool and is used in particular with 15 mm axles, which are used mainly on mountain bikes. The lockring with external gearing usually fits bikes with 12 mm thru-axles as well. However, in a rare case on a road bike, it can rub against the front fork. Make sure to check if this space is very tight (1 mm - 2 mm space) or not. If it is, then we advise the lockring with internal teeth.

Weight of brake discs
• 203 mm: 164 grams
• 180 mm: 132 grams
• 160 mm: 109 grams
• 140 mm: 88 grams

Technology

Type of bike
These XT RT-MT800 discs are designed for the XT MTB series. They also work well on touring bikes, road bikes, and city and e-bikes.

Heat dissipation through Ice-Tech Freeza technology
These rotors feature Shimano's Ice-Tech Freeza heat management technology. The brake surface consists of 3 layers: 2 of stainless steel and 1 of aluminium. As a result the heat dissipation is very good, so you'll still have good braking power on long descents which require being on the brakes for a while. Brake fade as well as brake oil overheating is also less likely, so you can have more confidence in your braking power.

Delivery includes

- Shimano RT-MT800 brake disc (including lock ring)

Assembly

How do I mount a disc brake rotor?
For disc brake rotors, you have 2 different ways of mounting depending on the lock ring. One has an internal fit that you can tighten with a Cassette Removal Tool without a pin. If the inside of the key is open, it can reach far enough over the axle of the wheel. The other version is an external fit that you can tighten with a bottom bracket tool.
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Reviews

Reviews

4.8 / 5
Average from 69 reviews
5
53 reviews
4
10 reviews
3
0 reviews
2
1 review
1
0 reviews

Photos from customers


Most recent reviews

5 / 5

Perfect addition to my new wheels

- Thom 9 June 2024

Nice finish to the disc it does not rust, and neatly packaged.

Pros & Cons

Beautiful finish
Easy application
Automatic translation

5 / 5

Easy to install and highly efficient

- Gaetan 6 June 2024

Bought for my training wheels, it looks very nice compared to basic models at a reasonable price.

Automatic translation

5 / 5

Easy assembly, works as expected. I am satisfied with the purchase.

- Michal 17 May 2024

Easy assembly, works as expected. I am satisfied with the purchase.

Pros & Cons

looks good
works good

5 / 5

Super fine brake disc

- Arjan 17 March 2024

This brake disc is perfect for good braking action without suffering from heat. They brake well right away but after braking in, they do even better. Highly recommended.

Pros & Cons

Braking power before braking in already good.
Good fit as you would expect.
Light brake disc
No
Automatic translation

5 / 5

shimano quality at its best.

- Christophe 15 March 2024

Assembly is child's play and no instructions are required. The perceived quality is excellent and the use is in line with what I expect from a brake disc.

Automatic translation

5

Thom, 9 June 2024

Perfect addition to my new wheels

Nice finish to the disc it does not rust, and neatly packaged.

  • Beautiful finish
  • Easy application
Automatic translation

5

Gaetan, 6 June 2024

Easy to install and highly efficient

Bought for my training wheels, it looks very nice compared to basic models at a reasonable price.

Automatic translation

5

Michal, 17 May 2024

Easy assembly, works as expected. I am satisfied with the purchase.

Easy assembly, works as expected. I am satisfied with the purchase.

  • looks good
  • works good

5

Arjan, 17 March 2024

Super fine brake disc

This brake disc is perfect for good braking action without suffering from heat. They brake well right away but after braking in, they do even better. Highly recommended.

  • Braking power before braking in already good.
  • Good fit as you would expect.
  • Light brake disc
  • No
Automatic translation

5

Christophe, 15 March 2024

shimano quality at its best.

Assembly is child's play and no instructions are required. The perceived quality is excellent and the use is in line with what I expect from a brake disc.

Automatic translation

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Shimano XT M8100 RT-MT800 Shimano XTR M9100 RT-MT900 Shimano SLX M7100 / 105 R7000 SM-RT70 Shimano SM-RT64
69 reviews 23 reviews 26 reviews 7 reviews
Packaging Factory Packaging / OEM Factory Packaging / OEM Factory Packaging / OEM
Bike Type Roadbike / Gravel & CX Bike / MTB / E-MTB / City Bike & E-bike Roadbike / Gravel & CX Bike / MTB / E-MTB / City Bike & E-bike Roadbike / Gravel & CX Bike / MTB / E-MTB / City Bike & E-bike Roadbike / Gravel & CX Bike / MTB / E-MTB / City Bike & E-bike
Mount Centerlock Centerlock Centerlock Centerlock
Length 140 mm / 160 mm / 180 mm / 203 mm 140 mm / 160 mm / 180 mm / 203 mm 140 mm / 160 mm / 180 mm / 203 mm 160 mm / 180 mm / 203 mm
Hardness of brake pads Hard (Metal) / Medium (Semi-Metal) / Soft (Resin/Organic) Hard (Metal) / Medium (Semi-Metal) / Soft (Resin/Organic) Hard (Metal) / Medium (Semi-Metal) / Soft (Resin/Organic) Hard (Metal) / Medium (Semi-Metal) / Soft (Resin/Organic)
Weight 88 grams / 108 grams / 132 grams / 164 grams 108 grams / 131 grams / 147 grams / 89 grams 121 grams / 158 grams / 193 grams / 133 grams 178 grams
From 40,61 From 58,91 From 30,44 From 25,36
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