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Silca Ultimate Tubeless Valves feature a large bore internal diameter for high flow rates, an inseert compatible base for excellent inflation even with inserts, and a 4mm hex key installation with low profile lock nut for easy, rim-safe installs.
Silca Ultimate Tubeless Valves feature a large bore internal diameter for high flow rates, an inseert compatible base for excellent inflation even with inserts, and a 4mm hex key installation with low profile lock nut for easy, rim-safe installs.
Silca

Silca Ultimate Tubeless Valve Stems : 50mm

£28.00
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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!

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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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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 5% 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

Silca Ultimate Tubeless Valve Stems : 50mm

Season:2025

Brand:Silca

Code:SIAMAC066ASY0100

SILCA Ultimate Tubeless Valves offer high flow rates, easy compatibility with tyre inserts, and reliable long term service.

Designed to work seamlessly within the SILCA tubeless system, these valves complement
products like SILCA Ultimate Sealant with FiberFoam and SILCA Ultimate Tubeless Rim Tape. The result isdependable performance that meets the needs of riders at every level

Stand-out Features:

Secure Hex Key Installation:
Unlike other brands, SILCA valves feature a 4mm hex key interface - ensuring precise torque and rim-safe installs.

Low-Profile Lock Nut:
Hex-style nut with rubber washer protects rim finish and improves sealing.

Maximum Airflow with Insert Compatibility:
Optimised side-slot design maintains airflow, even when paired with tubeless tyre inserts.

Integrated Core Removal Tool:
Built into the valve cap, always ready when sealant needs to be refreshed or cores need replacing.

Premium Materials and Machining:
High-quality alloy construction for long-term reliability.


SILCA Ultimate Tubeless Valves, Ultimate Injectable Sealant, and Ultimate Tubeless Rim Tape are designed to work seamlessly together—providing riders a complete, premium tubeless solution.

Available in 50mm and 70mm lengths for most modern rims.
  • €32.23
    EUR
  • $45.99
    AUD
  • $43.72
    CAD
  • $53.39
    NZD
  • $32.19
    USD
  • CHF24.65
    CHF
  • kr340.50
    SEK
  • kr3,899.66
    ISK
  • kr240.66
    DKK
  • kr309.34
    NOK
  • ¥4,914.57
    JPY
  • Technical Information
    • Precision CNC-machined aluminum body
    • 4 mm hex interface for secure, tool-controlled installation
    • Insert-compatible design with most tyre inserts
    • Perfect system match with SILCA Ultimate Tubeless Tape
    • Threaded aluminum valve cap with core tool
    • Low profile lock nut
    • 50mm and 70mm length optimised for modern rims
    Sizing Information
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