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The purest expression of Wolf Tooth's engineering accumen, the MK0 or Mark Zero Bottom bracket delivers class leading sealing for a Ceramic Bottom bracket to ensure longevity AND performance, while extensive machining reduces weight
The purest expression of Wolf Tooth's engineering accumen, the MK0 or Mark Zero Bottom bracket delivers class leading sealing for a Ceramic Bottom bracket to ensure longevity AND performance, while extensive machining reduces weight
Wolftooth

Wolf Tooth MKØ BSA Bottom Brackets : Stealth Grey

£285.00
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I'm a Pre-order Product. We estimate this will be ready for despatch to you or collection via Click & Collect on 13 April 2026 00:00Find out more
Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on 13 April 2026 00:00
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Anxiety-free returns

Returns and exchanges

If you are not completely satisfied with your purchase, simply return the item or items to us in their original condition* within 30 days of receipt. You must notify us in writing within 14 working days of placing your order, by post or email of your intention to do this.

RETURN ADDRESS:

Returns Department
7hundred Ltd
68 Peascod Street
Windsor
SL4 1DE

We will issue a refund, credit or exchange the item for a different size / colour if preferred. Delivery charges are only refundable if you have canceled your entire order within the 7 day Cooling-Off Period or where the goods are faulty and a refund is made.

Store Credit is valid for 2 years and cannot be redeemed for cash at any point.

Where you require an exchange, for example, because a size has been incorrectly ordered, we will make a £4.95 charge or deduct the value from Reward Points where available, to cover re-delivery costs.
(Note: For larger items such as wheels, smart trainers, this charge may vary and you will be informed of the price before the item is sent).

Payment for this must be provided before we will send out the replacement item.

For European and International orders the charge will vary depending on the current cost of delivery to that country. For an accurate price, please contact us before returning your item.

Sorry, we cannot accept returns of books or software where any seals have been broken or working products that have been used.

Please note :

  • The item is your responsibility until it reaches us. For your own protection, we recommend that you send the parcel using a delivery service that insures you for the value of the goods.
  • The cost of returning the item to us is your responsibility.
  • The parcel can take up to 7 working days to be processed once received.

* Note: when trying on items of clothing, please ensure that you are not wearing perfume / aftershave or a deodorant which may leave a scent or marks on the item. In the case of cycling shorts please ensure that underwear is worn when first trying them on. The item(s) must be returned in its original packaging with all labels and tags and with all enclosed documentation.

We will be unable to accept the return of any item where there is evidence that these instructions have not been followed.

PLEASE NOTE: For large items such as bikes, trainers and associated large / bulky accessories and wheels, we reserve the right to charge a re-stocking fee of 10% to cover our administration costs. This re-stocking fee also applies to SPECIAL ORDERS for Q36.5 Clothing items where sizing or colours fall outside our in-store ranged collection.

Faulty Item

If the item you received is faulty, please contact us quoting your order number, your name and address, details of the product and the reason for return, and whether you require a refund or a replacement. We will then advise on how to proceed with the return. You have 30 days from receipt of the faulty item to notify us of your intent to return it and a further 30 days in which to do so.

Incorrect Item

If the item you received is not what you originally ordered, please contact us quoting your order number, your name and address, details of the product and the reason for return, and whether you require a refund or a replacement. We will then advise on how to proceed with the return.

All refunds will be given as soon as possible, and usually take the form of a refund transaction onto the card used for the original purchase. At the very latest we will refund your money within 28 days from the day we receive your returned item. In the case of incorrect ordering and undisclosed reasons for return, a credit or exchange may be issued and the customer will be expected to pay the return postage costs.

All returns must be accompanied by a completed returns form and a copy of the original invoice.



You can submit a returns form here:

Returns Form

Wolf Tooth MKØ BSA Bottom Brackets : Stealth Grey

Season:2026

Brand:Wolftooth

Code:WTWBBBSAMK0SGRGry

The new Wolf Tooth MK0 Bottom Brackets take performance to another level with aggressive machining, custom ceramic bearings, and intricately designed race sealing built to the company's exacting specifications.

The MK0 design saves you watts while proving durable enough for the most intense road or off-road racing and inclement conditions through best-in-class sealing - and they are fully serviceable.

NO COMPROMISE

Durability and ceramic bearings haven't always gone hand-in-hand. Where many ceramic bottom brackets are known for spinning with low friction, they're not known for making it through even a few months of riding in harsh conditions. The Wolf Tooth MK0 ceramic bearings feature custom race sealing for flawless performance against the elements and endless speed.

BUILT TO ENDURE

Custom bushings separate the bearing inner race and crank spindle to eliminate metal-on-metal contact, the leading cause of bottom bracket creaks. This bushing also helps enhance bearing longevity with an interface to the bearing gutter seal for maximum weatherproofing. No metal-on-metal contact, no creaks.

WICKED LIGHT

It all adds up. Aggressively machined to be lighter than the competition while offering superior speed and performance in all conditions. Win-win.

  • €326.66
    EUR
  • $454.90
    AUD
  • $438.50
    CAD
  • $547.49
    NZD
  • $315.48
    USD
  • CHF250.52
    CHF
  • kr3,556.43
    SEK
  • kr39,034.74
    ISK
  • kr2,440.88
    DKK
  • kr3,057.21
    NOK
  • ¥49,974.01
    JPY
  • Technical Information

    Wolf Tooth Bottom Brackets set the bar for performance, weight, durability, and performance. The new MK0 Bottom Brackets group those best-in-class specs with a ceramic bearing. The sealing is especially important here. Where many ceramic bottom brackets are known for spinning without friction, they are not known for being durable. The MK0 Bottom Bracket eliminates that issue, with best-in-class sealing for never-ending performance. Like other MK0 items, these bottom brackets spent extra time in the CNC lathe to reduce weight with new, consistent aesthetics. Form has met function.

    • Premium ceramic bearings with low dragseals are built to exacting specifications
    • Adjustable-width sleeve fits 68mm - 73mmBSA bottom bracket shells
    • Best-in-class weather sealing protectsbearings from water, mud, and debris
    • Custom polymer spindle bushingseliminate creaking and the unique MKØversion is modified for even lower seal drag
    • Compatible with 24mm, 29mm DUB, and 30mm spindle cranksets
    • Installation and removal with standard44-16 (24mm) and 46-12 (29mm DUB,30mm) spline tools
    • Designed, machined, and assembled atWolf Tooth in Minnesota, USA

    Bottom brackets ship with the following shell and spindle spacers:

    • 2x 2.5mm shell spacers
    • 24mm spindle - 2x 0.5mm, 2x 1mm, 2mm, 3mm, 5mm spindle spacers
    • 29mm spindle - 2x 0.5mm, 2x 1mm, 3mm, 5mm, 7.5mm spindle spacers
    • 30mm spindle - 2x 0.5mm, 2x 1mm, 2mm, 3mm, 5mm spindle spacers

    COMPATIBILITY

    • 68mm, 73mm, 83mm, and 100mm width BSA bottom bracket shells
    • Included adjustable-width internal sleeve fits 68-73mm width BSA bottom bracket shells
    • 83 and 100mm width internal sleeves are available for purchase as add-ons
    Sizing Information
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