Fulcrum Option Kit 135/142 HH12

The Fulcrum RM16-TA12142 Option Kit is an official Fulcrum hub conversion kit that allows you to adapt compatible Fulcrum wheelsets from 135mm O.L.D.* to 142mm thru-axle 12mm (HH12) configurations. Whether you're switching between bike platforms, upgrading a frameset, or speccing a build around modern thru-axle standards, this genuine Fulcrum kit ensures a precise, factory-quality fit.

Fulcrum's HH12 (Hollow Hub 12mm) thru-axle system is designed to maximise lateral stiffness and wheel tracking accuracy – and this Option Kit lets you unlock that compatibility without the need for an entirely new wheelset. All components are manufactured to Fulcrum's exacting standards, ensuring the same performance and durability you'd expect from the wheel itself.

This kit suitable for converting older 135mm thru-axle or QR rear dropout rear wheels to the 142mm spacing which aligns with the current road and gravel thru-axle standard.

If you're running Fulcrum Racing or Racing Light wheels and need to adapt them to a new frame or riding platform, the RM16-TA12142 is the correct, manufacturer-approved solution.

Key Features:

• Official Fulcrum hub Option Kit for converting 135mm wheels with a 12mm hub axle to 142mm thru-axle 12mm (HH12) compatibility
• Genuine Fulcrum replacement and conversion component
• Enables wheel reuse across different frame standards
• Precision engineered for correct hub end-cap fitment and bearing alignment
• Part number: RM16-TA12142

Technical Specifications:

Is This the Right Kit for Me?

This kit is the correct choice if:

• You own a compatible Fulcrum wheelset with a 12mm axle and 135mm OLD and need it to fit it to a frame with a 142mm 12mm thru-axle rear dropout
• Your frame uses either 142mm rear axle spacing
• You want a genuine Fulcrum part to ensure correct fitment and preserve your wheel's warranty

If you're unsure whether this kit is compatible with your specific wheelset, feel free to email the Fawkes Cycles team – we're happy to help you identify the right option.

*O.L.D. in cycling stands for Over Locknut Dimension. 

It refers to the measurement of the width of a bicycle hub, specifically the distance between the outside faces of the hub and therefore the width of the frame at the rear drop-outs. 

DELIVERY

Delivery to mainland UK addresses are free for orders over £40. Except when you choose delivery to a third party (Click and Collect) there is a charge of £5.95 to cover some of the additional cost the couriers charge for this service. If you choose to collect from Fawkes warehouse there is no shipping charge.

There will an additional charge for deliveries to Highlands and Islands. 

RETURNS TO FAWKES

Whether it’s a jersey that doesn’t fit, or the colour is not quite right, sometimes you’ll need to return items to us.

If an item is 'as new' and has not been used or fitted in any way, you can return it to us by post within 90 days of delivery for a refund. Please ensure that the goods are returned in their original packaging and are in an unused condition.

Please click HERE to print and then complete the returns form and include it inside your parcel.

If you wish you can use our Royal Mail Returns service please follow the instructions on the link below to return your parcel to us.

Royal Mail Returns Service

Please pack the item carefully to avoid damaged during shipping.

Customers need to pay the cost of return delivery unless the item is faulty and this will be deducted from your refund, currently £3.95.

If your have a large item e.g. Child seat, Bike, trailer etc. please contact our customer service team at Guy@fawkes-cycles.co.uk to arrange the best way to return your item, the cost will be deducted from your refund.

You will not receive a refund for the retail value of any free or promotional items you are sent, and you will be charged if they are not returned.

UNWANTED ITEMS

If you change your mind on your purchase, you have a full 90 days to return it for a refund. All Goods must be unused, in a saleable condition and in their original packaging with all labels still attached.

Please pack the item carefully to avoid damaged during shipping.

There are some exclusions to our 90 day returns policy, which are detailed below:

Nutritional products or those with a best before date must be returned within 28 days*

Any customised items such as wheel builds cannot be returned*

GPS systems such as sports watches or cycle computers can only be returned if unregistered*

For hygiene reasons, any intimate garments such as facemasks, underwear and swimsuits can only be returned if the items are faulty.

*Unless faulty

If you wish to return your item for a refund, please follow the returns procedure above.

We try our best to process all refunds within 14 working days. We'll refund your item via your original payment method.

You will not receive a refund for the retail value of any free items you are sent, and Fawkes may charge you for this item if you fail to return it

FAULTY ITEMS

If you feel that your purchase has developed a fault, then please contact us with photographs of the issue before returning any goods - we may be able to solve your problem without you incurring any further inconvenience.

If you find a fault with your item, send it back to us and we'll take a look at it as soon as we can. Items sent back to us will undergo an inspection and it may be necessary to send the item away to the manufacturer to confirm the fault. If we confirm a manufacturing fault, we'll happily replace or refund it.

Please pack the item carefully to avoid damaged during shipping. 

Faulty items should be returned within a reasonable time and in a clean and dry condition. PLEASE NOTE, WE WILL NOT PROCESS DIRTY ITEMS.

Please enclose all your details and a covering note explaining the fault and any other useful details.

We'll try to get back to you within 14 working days of receipt of your parcel, although during busy periods this may take slightly longer.

Your statutory rights are not affected.

We reserve the right to recharge return carriage on items where no fault is identified.

Customer Service Email: Guy@Fawkes-Cycles.co.uk

Please contact us for our Payment & Security policy.