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Original replacement headset for your bike.
Original replacement headset for your bike.
Trek

Trek 1-1/8in 45-Degree Sealed Headset

£10.99
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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!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

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 Undetermined
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When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

Hassle free returns

In the unlikely event that you are not satisfied with your purchase please feel free to return your items within 90 days of the purchase date for a full exchange or refund. Any item (excluding food, underwear or e-gift vouchers) can be returned to us for any reason within 90 days, provided that the item has not been used or fitted and is returned in its original packaging with valid proof of purchase.

It is recommended that you use a recorded delivery service or return to a store to ensure your items are received by us. We cannot assume responsibility for items that are lost in transit back to us.




Terms & Conditions

Items must be returned in their original packaging and unused. Refunds will be issued once the product(s) have been received and inspected.

Click & Collect customers can buy with confidence knowing that they can review the item before deciding whether it is right for you before leaving the store. Should you decide it's not right for you, it can be conveniently exchanged or refunded straight away, or you still have up to 90 days to return it if you are still unsure.

Please note:
1. If the items we have sent you are faulty, damaged or not as we described, we will cover the cost of collection and the delivery of the correct item.

2. If we have delivered the correct bike but upon inspection, you decide the bike is not the one for you, we will charge you £50 for collection (£100 from Northern Ireland). If you do not have the original box in usable condition, we will charge you an additional £15 to provide one.

Refunds will be processed using the same method of payment used for the original purchase. Credit & debit card refunds must be made to the card used for the original purchase.

We are unable to offer a refund without a valid proof of purchase.

Trek 1-1/8in 45-Degree Sealed Headset

Season:All Year Round

Brand:Trek

Code:W5310900

Original replacement headset for your bike.

Features:
  • Confirm compatibility before use
  • Includes reducer, bearings, cling ring, gasket and dust cover
Sizing Information
Professional Opinion
Question(s) answered about Trek 1-1/8in 45-Degree Sealed Headset
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Question(s) asked regarding Trek 1-1/8in 45-Degree Sealed Headset

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  • Will it fit my trek 6700 from 2007
    Question asked by Lasse on 09/08/2025 11:41:47
    I would recommend contacting our support team via https://www.balfesbikes.co.uk/pages/contact/ with your bikes frame number and they should be able to look up the correct part for your bicycle.
  • Will this fit a trek alpha 2.1
    Question asked by Paul on 06/03/2025 18:45:58
    Yes this headset will work with the Trek Alpha 2.1
  • Is this bearing set compatible with Trek Domane Al 2 disc gen 3?
    Question asked by Steve Harrison on 13/02/2025 07:21:22
    If you could send this question and your bicycles frame number to: [email protected] our support team will be able to investigate and advise on the correct bearing for your bicycle.
  • Is this compatible with the headset bearing below on a 2009 trek 6700 WMD
    Question asked by Alan Lucas on 04/12/2024 22:41:11
    This headset is not compatible with the Trek 6700 WMD 2009.

    This bicycle uses a contventional striaght 1 1/8" threadless headset:
    https://www.balfesbikes.co.uk/components/finishing-kit/elite-headset-1-18in-threadless-black-ec34286-ec3430__46545

    Fitting one of these will require specialist tools so I would recommend having this done at one of our stores@
    https://www.balfesbikes.co.uk/our-stores/
  • Is this compatible with trek dual sport 2 gen 4?
    Question asked by Sebastian on 08/09/2024 15:32:22
    No. The Trek dual sport 2 gen 4 uses a loose ball headset.

    They do seem to vary in size by the year and variant.

    However it seems to be either 1/4" top and bottom

    or

    3/16'' Top and 1/4" lower.

    (Don't forget to pack them with some fresh grease)

    If you are in doubt feel free to pop in and ask our friendly mechanics:

    https://www.balfesbikes.co.uk/our-stores/

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