How it works

WANT TO GET DISCOUNTS ON ANY MUC-OFF PRODUCTS?

The 94th Battalion is our community & loyalty programme, you can earn points by completing tasks on muc-off.com or submitting content on Insta. Points can be exchanged for discounts.

How can I earn points?

You can then earn points for purchases, social follows, friend referrals and loads more. Progress through the ranks to unlock even more radness.

How to earn points for content:

Check out this month's theme here and upload some mad content to earn points, get featured in the main gallery for 100 points or bag a top 3, winning entry to get a spot on our homepage for 500 points and a mega prize.

New In

Big Bore Hybrid Tubeless Valves

Name: Big Bore Hybrid Tubeless Valves
Brand: Muc-Off UK
SKU: 21128
Price: 40.00 GBP
Availability: InStock

SKU Code: 21128

Introducing our latest innovation in tubeless valve technology: The Big Bore Valve range. Engineered with precision and designed to deliver maximum inflation simply and efficiently, this patent-pending valve sets a new standard and is the benchmark in high air flow tubeless tyre systems with a revolutionary ‘Straight through’ internal design for maximum airflow fire power.

£40.00

What size do I need?

Select your manufacturer and rim model below:

Manufacturer: Rim Model:

OR

Enter your rim depth in millimeters (mm): Show me how

To get the right sized valve please measure the vertical distance from spoke hole to where you're tyre meets the rim, as shown below -

Free UK delivery over £30

Free sample pack when you spend over £40

Fast UK Fedex delivery (1-3 days)

Save 25% on Hey Dipstick when bought with a Big Bore Valve. Add both items to your basket for the discount to be applied at checkout.

Pairs great with:

Hey Dipstick!

Precision Machined sealant level Dipstick. Save 25% on Hey Dipstick! when bought together with Big Bore Valves. Discount applied at checkout.

£10.00

Unrestricted Air Flow

7075 Aircraft Grade Aluminium

Pressure Control On The Fly

Quick & Easy Setup

Featuring a cutting-edge, integrated ball valve system, the valve ensures lightning-fast airflow,turbocharging thesealant filling process. Say goodbye to the hassle of traditional tubeless valves that clog up and requirethe valve core to be removed tofill sealant and achieve sufficient air flow during tubeless set up.

Our Big Bore Hybridoffers up to 254% higher air flow than traditional Presta valves thanks to the straight through bore design.

With our ball valve constructionand integrated lever, you can quickly open and close the valve for effortless airflow control, and evenfine tuneyour pressure whilst you're out riding.

Crafted from 7075 aircraft grade CNC machined aluminium construction with a stainless steel ball valve, this fully serviceable valve is built to withstand the toughest rides, whatever the conditions.

Full Bore, No Core

'Straight through' internal valve core for maximum sealant and airflow.

Join the tubeless revolution with up to 254% increased airflow for faster inflation and efficiency.

What's Included
- Big Bore Valve
  
  Available in 6 colours and 4 different sizes (60mm available in Black only).
- Hex Slot Key
  
  4mm machined hex key slot for easy installation / removal
- Rubber Bases & O-Rings
  
  Supplied with various rubber bases and O-Rings to optimise fit and seal with multiple rim types
- Bespoke Spanner
  
  Specifically designed to tighten the big bore body during installation and removal.
- Sold Separately
  
  Sealant dipstick also available separately

Big Bore. No Core

Experience maximum airflow and simplified set up & servicing with our innovative coreless valve design with integrated stainless-steel lever-operated ball valve system.

Unrestricted Airflow

The straight-through design delivers up to 254% greater airflow than Presta valves – Supercharging tubeless set ups and getting you back to the action fast.

Dial In Pressures On The Fly

The integrated lever opens and closes the valve for micro-adjustments to pressures whilst you’re riding, so you can adapt to changes in the terrain or conditions.

It's Super Tough!

Precision CNC machined from 7075 aircraft grade aluminium.

Universal compatibility

Featuring a universal valve head that’s compatible with most screw on and push fit pumps, as well as a 4-way tyre insert air flow base that’s compatible with most tubeless inserts.

Serviceable design

With spanner flats on the head, lever and body, this valve can be serviced and maintained to last for years – Plus the coreless design means you can check sealant health through the valve with our Hey Dipstick! (Sold separately).

How To Use

Remove Ball Valve

First, remove the ball valve body, cap, locking ring & O-ring from the valve stem.

Choose Base

Choose the correct rubber base for your rim type. Rims with a curved rim section will use the circular rubber base. Rims with a square rim section will use the square rubber base. Slide this down to the bottom of the valve stem. (If your rim has a larger valve hole and the smaller circular fitment is too loose, use the larger circular fitment to plug the hole).

Push Valve Stem Into Hole

Now push the valve stem into the hole in the rim and push it right the way through. Then place the rubber 0-ring onto the valve stem and slide it all the way down until it meets the rim.

Screw Locking Nut

Screw the locking ring onto the valve stem and tighten down above the o-ring. This sandwiches between the locking ring and the rim.

Tighten Ball Valve Body

Firmly tighten the ball valve body onto the stem using your fingers. Now use a 4mm hex to hold the stem base in place inside the rim, and with an 8mm spanner, tighten the valve body to the stem with a quarter turn. Be careful not to over-tighten, which could lead to damaging the O-Ring. Rotate the body to ensure the lever is pointing towards you. TIP - Use some thread lock such as our Loc-On (available soon!) for an extra secure seal.

Push Firmly Down

Now push firmly down on the valve base inside the rim as you tighten the locking ring. Keep pushing until the locking ring is hand-tight and the rubber O-Ring squashes out slightly. This way you know you've created a good airtight seal. TIP - Don't over-tighten as this can cause leakage.

Rotate Lever

Rotate the lever open and fill with Muc-Off Sealant and inflate to your desired PSI! Remember to close the valve so the arrow on the lever is pointing up before removing your pump. You're now ready to roll. To adjust psi on the fly simply open the valve slightly to release air to your desired pressure.

FAQS

Which valve do I need for my bike?
CHOOSE YOUR FITMENT
- LITE: Fitment: Presta Pump | Presta Rim | 230% Airflow vs Presta Valves
- HYBRID: Fitment: Schrader Pump | Presta Rim | 254% Airflow vs Presta Valves
- LUDICROUS (Coming Soon): Fitment: Schrader Pump | Schrader Rim | 264% Airflow vs Presta Valves
CHOOSE YOUR COLOUR
- Choice of 6 eye-popping anodised colours (Black, Iridescent, Red, Blue, Orange or Pink). 60mm only available in Black.
CHOOSE YOUR SIZE
Available in 4 sizes of valve stems to suit different rim depths. The length of valve you need will depend on the height/depth of your rim. You will need to ensure that you have enough threaded stem valve poking through the valve hole to not only secure it with the O-Ring and Lock ring but you will also need to be able to screw on the top half of the valve.
- 30mm (Small)
- 35mm (Medium)
- 45mm (Large)
- 60mm (Extra Large - Available in Black Only)
What’s the difference between Lite & Hybrid?

The lite version is slightly more lightweight and has a Presta fitment so will use a Presta Pump to inflate. The Hybrid version has an extra wide high airflow head which uses a Presta drilled rim but with a Schrader valve for a slightly higher airflow rate. Hybrid requires aSchraderpump which most pumps have.
Can I switch to Hybrid if I already have a Presta valve installed on my bike?

Yes, for sure. All it will mean is that you will now have a Schrader valve so you will inflate it with a Schrader Pump, which almost all pumps have.
Why switch to Big Bore vs current Tubeless Valves?

With a coreless ball valve it has a ‘straight through’ internal design it has maximum airflow. The means that you can inflate your tyres and add in sealant much quicker vs a regular Presta valves.
It delivers a higher flow rate of up to 264% vs standard Presta, meaning you can inflate in seconds versus potentially minutes, and even quicker with a co2 inflator.
In addition, with it having no valve core and a servicing kit coming soon, it means your valves will last for much longer and won’t need to be replaced as often.
Can I use Big Bore with my secure tag holder?

Yes, the Muc-Off Secure Tag Holder is compatible with Big Bore Tubeless Valves.
When is the Ludicrous Big Bore Valve launching?

Whilst we can’t give an exact date now, we expect it to launch in late 2024/early 2025.

How it works

Your Cart