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Silca Hiro Side Lever Locking Disc Chuck

  • £105.00
In Stock at Warehouse | Shipped in 3-5 days
free UK delivery On orders over £50
Finance Available Click here for more information

Bullet-proof high-pressure, disc compatible chuck for high pressure situations.

Years ago I was working with the Team CSC at the Dauphine Libere when I noticed one of their mechanics using the most amazing little chuck to manage the disc wheel inflation.  Unlike anything I had seen before, it was all metal and used a 'lollipop' lever on the side to lock onto the valve stems in disc wheels.  He explained to me that these were made in Japan, and were coveted by all the Euro Pro mechanics as they were very hard to come by, and even harder to get replacement parts for.  He followed all of that up by refusing to let me or any of the other mechanics even touch the thing!

Fast forward 10 years and I've been fascinated with creating a better, disc wheel compatible locking chuck.  One which can hold 300psi (not that you would EVER do that..) one that was made from even finer materials, like Stainless Steel, and one that had the history and legacy of SILCA behind it so that it could be purchased and used knowing full well that replacement parts would be available for the next 100 years. 

When I took the new SILCA side-lever prototypes to Europe, the mechanics were very clear in their demands:  single hand usage, 250+psi capability for road and track situations, and at least a year of service before replacing gaskets (the equivalent of 10 lifetimes of use for the rest of us), and NO hose clamps!  We worked tirelessly on these requirements as well as on innovating some new features, like a unique rotating head which allows the chuck to more easily align with the valve stem and eliminates hose twist regardless of wheel orientation.  We decided on stainless steel as the primary material for it's environmental friendliness compared to chrome plated steel and for it's extreme durability and chemical resistance when compared to all other metals.  We obsessed over the right amount of knurl, rough enough to be handled very precisely even when covered in grease or wet, yet not so much that those of us with office jobs during the week end up with shredded fingers.  By the end of the prototype period, the mechanics nicknamed the chuck 'Hiro' partially as a nod to the Japanese heritage, and also due to the shared pronunciation with the English word 'Hero'.  As one of my favorite team mechanics would joke, 'I have 5 minutes to fill 9 disc wheels to 9 different pressures using compressed Nitrogen before the TTT...I need a 'Hiro'!

The Side-Lever Locking Chuck is classic SILCA quality and manufacturing in every detail.  100% made in the USA from fine stainless steels, 100% rebuildable, and utilizing a new, high-tech elastomer gasket design, the 254, which is already available for replacement sale and like all other SILCA gaskets, will remain available for the next 25 years and probably longer.

  • Full metal construction, guaranteed for 25 years and covered by SILCAShield 
  • Uses SILCA 254 High-Tech Elastomer gasket
  • Adjustable gasket pre-load allows for customizable fit on any valve as well as compensation for gasket wear
  • Spring loaded lever for better force management and positive on/off feel.
  • Male Schrader thread fits into any Schrader chuck, or use SILCA Thread-On Schrader Adapter to fit to bare hose
  • 100% Made in USA

Please Note:

The Hiro Chuck is a finely crafted tool for those obsessed with the details as well as the experience of cycling.  It is a tool which rewards knowledge and understanding of how it works, please expect to spend some time acquainting yourself with the function of the Hiro before you use it.  It is not a screwdriver or a hammer, it is an intricately machined, high-precision device with very unique features and user adjustability, learn how it works and you will find great pleasure in it's operation.  You will smile every time you use it and you will amaze onlookers in the track infield at your ability to achieve any pressure without holding it in place, and you will someday hand it down to your children, who will replace the gasket and use it for another 25 years.  Passion. Precision. Performance


UK Deliveries
FREE when you spend over £50.00 in a single order
Otherwise it's typically £3.99 per order
Delivery should be expected between 2-3 working days unless stated on product page.

Worldwide Deliveries*
Approximately 4-10 working days depending on country
via Parcelforce Signed Delivery (fully traceable service). Please add items to the basket to calculate delivery for desired country.

If your country isn't listed for delivery at checkout please contact us.

Delivery of Bikes
We ship all our bikes free of charge within the United Kingdom (excl. Jersey and the Channel Islands at this time) and all our bikes come pre-assembled with just a few tweaks required (Please see our Bike Build Instruction page for details of assembly required).

All our bikes undergo a safety check before being re-boxed for shipping which can during busy periods take a little longer to complete so whilst we aim to ship all our bikes within two working days of the order please allow for additional time for this process.

Signature Required
All our consignments irrespective of the carrier require a signature upon delivery, deliveries are typically made between 08:00 and 18:00 so please bare this in mind when choosing a delivery address.

Package Recycling
We do try when possible to reuse packaging from our own suppliers in order to send purchased items to our customers, we ask if the packaging is still in good condition after you've received your goods then please try to use it again or recycle if not possible.

V12 Retail Finance is owned by Secure Trust Bank PLC. Registered in England and Wales 541132. Registered Office: One Arleston Way, Solihull, B90 4LH. Authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the Prudential Regulation Authority

How to apply

Applying for finance is as easy as making a normal purchase.

Fill your basket with everything you want from our site and go to the checkout.

During checkout, select the finance option you want as your method of payment.

You will be sent to our finance provider’s secure server to complete your application.

Finance provider V12 will use the information provided to make a decision and complete checkout if you are approved.

To apply for finance you must be:

At least 18 years old.

A permanent UK resident.

In regular employment (minimum of 16 hours per week) including self-employed, or living with your spouse/partner who is in regular employment.

In receipt of a pension if you are retired.

Able to confirm sufficient income if you are registered disabled.

Who provides the finance?

Our finance is supplied by V12 Retail Finance. It is the UK’s only specialist retail finance provider. Its secure and friendly online system can provide you with a decision in seconds.

Can my order be sent to a different address?

Finance orders can only be shipped to the address given in your finance application.