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XT WH-M8120 29in Boost Wheel

3.5 out of 5 stars
2 Reviews
Current price: $343.99 Original price: $429.99
20% off

Style & Size:


XT WH-M8120 29in Boost Wheel

Rushing to get off the tram with your bike in-hand, you know this run is going to get gnarly. Steep downhill trail and miles of exhilaration are ahead, but are your wheels up to it? The XT WH-M8120 29in Boost Wheel offers superior trail performance and handling so you won't worry cornering at top speeds. You'll benefit from increased stability and the kind of reliability that mountain bikers have come to trust with Shimano's Deore XT line.

M8120 rims are designed to provide reliable durability and rigidity while saving your pocket change. You'll love the lightweight feel of these 1,016g, tubeless aluminum wheels, and you'll be thanking yourself for the trail performance they offer outside. This is a zero dish rim thanks to the combined rim's shape and hubs' wide flange profile, and spoke tension is evened out on the drive and non-drive side because of the offset rims.

28 double-butted, j-bend spokes are laced to centerlock hubs for lasting strength, and the M8120 rear wheel features a lightweight aluminum Micro Spline 12-speed freehub. It’s compatible with 10t top gear by Micro Spline, and the smaller spline diameter, in addition to more widely distributed splines, limit cog damage on your wheel. A centerlock design makes rotor installation quick and easy.

Shimano Deore XT brings outstanding performance to any trail, and M8120 wheels are designed to tackle the tough stuff so you don’t have to worry about ramping up the speed. This new generation of wheels specifically focuses on handling and reliability so you can focus on enjoying your ride. And, with a simple setup, you’ll save time with maintenance so you can spend more time out on your pre-snow bucket list.


  • Durable wheel that offers control cornering at top speeds
  • Lightweight, tubeless aluminum rim for rigidity and speed
  • 28 double-butted, j-bend spokes for durability
  • Micro Spline 12-speed aluminum freehub on rear wheel
  • Centerlock makes for an efficient installation process
  • Item #SHIU184
Rim Material
Wheel Size
Rim Type
Rim Depth
Rim Width
[external] 34.7mm, [internal] 30mm
Brake Compatibility
centerlock disc
Micro Spline
Front Axle
15 x 110mm boost thru-axle
Rear Axle
12 x 148mm boost thru-axle
double butted, J-bend
Spoke Count
[front, rear] 28
Claimed Weight
[single] 2lb 3.8oz (1016g)
Manufacturer Warranty
1 year
mountain biking

Overall Rating

3.5 based on 2 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 1 reviews
3 Stars - 0 reviews
4 Stars - 0 reviews
5 Stars - 1 reviews

Fits True To Size

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Runs smallTrue to sizeRuns large

What do you think about this product?


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2 out of 5 stars

April 25, 2024

Beware of Durability

I've put it through the wringer

I love Shimano components and have had a long history of using Shimano hubs for 30+ wheelsets across every type of bike. This might be the last MTB hub/wheelset that I use from them. After this winter I pulled my bike down expecting minimal maintenance barring some lubing and bearing checks. In the stand the freehub worked great. At the end of the first ride I started to get me pedal feedback and chain slack. At home the freehub was definitely the source of the issue. Taking the wheel apart is not easy; Shimano have made a simple system very complex. I never fully diagnosed the issue, and my local shop was unable to figure anything out but the springs and internal ratchets in the freehub body seem to be the issue. It's documented by others that it can be a problem but seems to be on a hub-by-hub basis. Can't recommend the wheel.

James W

Originally reviewed on Backcountry.com

5 out of 5 stars

January 3, 2024

Great Wheelset

I've put it through the wringer

They are pretty sweet wheels. Build quality is exceptional. They feel very solid, stiff, and lighter than they actually are. The hub engagement is great too. Maxxis 2.5 tires sealed up very well with just a floor pump. Big fan! Great wheels for the price.

jak102441298 j

Originally reviewed on Backcountry.com