Shimano XT FC-M8120-1 Hollowtech II Cranks

  • Shimano XT FC-M8120-1 Hollowtech II Cranks - Components - Shimano - - - - Speedlab
  • Shimano XT FC-M8120-1 Hollowtech II Cranks - Components - Shimano - - - - Speedlab
  • Shimano XT FC-M8120-1 Hollowtech II Cranks


Shimano XT FC-M8120-1 Hollowtech II Cranks


Price incl. VAT excl. Local Import Taxes & Shipping Costs.

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Shimano XT FC-M8120-1 cranks - especially for 148 mm over locknut dimensions
The Shimano XT FC-M8120 1x cranks, unlike the FC-M8100-1 cranks, produce a chainline of 55 mm, so a 148 mm rear hub is recommended. It is based on a direct mount system that significantly accelerates chainring changes. In combination with a Shimano Dynamic Chain Engagement+ chainring, you get a front drivetrain of the highest efficiency and low noise, which also provides good chain retention.

Application: Enduro, All Mountain, Cross Country
Compatibility: 1x, 2x
Chainring Mount: Shimano Direct Mount

Technical Information:
Series: Deore XT M8100
Crankarm Material: aluminium
Axle Material: steel
Crankarm Length: 165.0 mm, 170.0 mm, 175.0 mm, 180.0 mm
Chainline: 55 mm
Q-Factor: 178 mm
Axle Diameter: 24 mm
Compatible BSA Shell Width: 68 mm, 73 mm
Recommended Bottom Bracket: BB-MT800 or BB-MT800-PA Pressfit Hollowtech II (not incl.)
Recommended Chain: HG 12-speed (e.g. CN-M8100)

- for 1x12-speed
- suitable for 148 mm rear over locknut dimension
- smoother ride even on rough terrain
- stiff and lightweight design accommodates aggressive trail riding
- hollow forged crank arms maximize power transfer and minimize weight
- anodised crankarms
- SM-CRM85 1x chainrings available separately
- also for 2x

Hollowtech II
What matters is the overall balance of the crankset. With regard to the entire crankset, an optimum ratio between the strength of the crank arms, the stiffness of the axle, the bearing position and other features is very important. During the development of the crankset, the overall balance of all individual elements was carefully considered in order to ensure maximum stability.
Outer bearing: On most 68 mm bottom bracket housings, the Hollowtech II 24 mm axle can be mounted outside the frame for better weight distribution and stability.
High-quality precision seals: The Hollowtech II set also features high quality precision seals in the bearing area to extend durability and maintain excellent rotation efficiency over time.
The axle and the 24 mm diameter bearings ensure optimum balance of the crankset and optimum transmission of power to the bicycle.

Manufacturer Part Numbers:
170.0 mm: I-FCM81201CXX
175.0 mm: I-FCM81201EXX

- 1 x Shimano XT FC-M8120-1 crank
- 1 x Shimano lockring
- 1 x TL-FC41 chainring installation tool
- 1 x Shimano crank bolt
- 2 x spacer

Weight: 628g


What crank arm lengths are available for the Shimano XT 12 speed MTB cranks?
The Shimano XT 12 speed MTB cranks are available in 165 mm, 170 mm, 175 mm and 180 mm.

What type of chainring mount is compatible with the Shimano XT 12 speed MTB crank?
The Shimano XT 12 speed MTB crank is compatible with DIRECT MOUNT.

What is the chainline for Shimano XT M8120-1 12 speed MTB crank?
The Shimano XT M8120-1 12 speed MTB crank chaniline is 55 mm.

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SPEEDLAB ships from Monday to Friday with the exception of public holidays. We ship complete orders only, i.e. the dispatch usually takes place as soon as all ordered items are ready for dispatch. Please contact the SPEEDLAB service team if you wish a partial delivery.


Depending on destination country, package size, volume and weight, SPEEDLAB ships with the carriers German Post, DHL, German parcel service, DPD, USP. Deliveries of bulky goods, for example complete bicycles, will be handled by selected forwarding companies.

For return shipments SPEEDLAB cooperates with German Post, DHL and DPD. Large bulky goods like bicycles will be picked up by a forwarding company.

In Germany and most European countries the are shipped with DHL, Hermes, DPD, UPS, German Post.




  • Germany 5,99 Euro DHL / DPD / Hermes / German post
  • Rest of Europe: 13,99 Euro (DHL, DPD, Hermes)
  • Rest of world: 29,99 Euro DHL
  • Cash on Delivery + 4,9 €


For all items marked with this symbol, which are ordered on business days from Monday to Friday by 3 p.m. (CET), we offer the DHL Express shipping option or UPS for selected delivery countries. The DHL Express&UPS option is subject to an additional surcharge. It can be selected during the ordering process, provided that all items in the shopping cart offer the Express option. In addition the DHL Express option must be available for the selected delivery adress.

An order within the EU usually arrives the following business day. Depending on the postal code of the delivery address, longer parcel delivery times may occur.


  • Germany 15 Euro (DHL, UPS, TNT)
  • Rest of Europe – 49 EURO (DHL, UPS, TNT )
  • Rest of world – on request

In-stock items will be shipped within Germany in 1-2 working days, within Europe and worldwide in 1-3 working days. Unfortunately the delivery at a certain date given by you is not possible due to logistic reasons.

Should the ordered item not be in stock, the delivery time is extended analogue to the delivery in our warehouse. Information regarding the availability can be obtained at +49-7022-9-777-818 or

Please note: The ordered goods may be subject to a partial delivery.

Import Taxes, Customs Duties and Fees / National VAT

The indicated prices including VAT. In addition to the calculated SPEEDLAB shipping costs customers not living in the EU have to pay the national VAT and duty in their country for the imported goods.

Transport Damage

If you receive a damaged shipment please refuse the receipt if possible. Anyway, please get in touch with the Bike24 service team by e-mail or phone as soon as possible. We will be happy to solve the issue.


The SPEEDLAB team will do its best to fulfill your change requests.

The wish to cancel must be declared within 14 days after receipt of the goods. The return must take place within 14 days after the declaration of the cancellation.

Before the actual dispatch of your order, it can still be canceled. Please send us your request as soon as possible using the contact form or call us by phone. Should the payment have been charged already, it will be refunded in a timely manner.

Pack everything you want to return to SPEEDLAB carefully and include your order number. Remove the old shipping label and attach the return label to the package. You can return the package at DHL and Hermes stations. For all other countries: Please contact us with your return request and our customer service will arrange the process. Usually, SPEEDLAB covers the return costs.

A return will be processed at SPEEDLAB within a few working days. Once your request has been successfully processed it will be confirmed by e-mail. A possibly necessary refund will be processed directly afterwards.


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