Muc-Off Big Bore Hybrid Tubeless Valves

Introducing Muc-Off's 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.

Say goodbye to the hassle of traditional tubeless valves that clog up and require the valve core to be removed to fill sealant and achieve sufficient air flow during tubeless set up.

Muc-Off's Big Bore Hybrid offers up to 245% higher air flow than traditional Presta valves thanks to the straight through bore design.

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

How To Use

1. Remove Ball Valve

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

2. 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).

3. 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.

4. 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.

5. 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 Muc-Off's Loc-On (available soon!) for an extra secure seal.

6. 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.

7. 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.

Technology

Big Bore. No Core

Experience maximum airflow and simplified set up & servicing with Muc-Off's 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 Muc-Off's Hey Dipstick! (Sold separately).

Features

• Precision CNC machined from 7075 aircraft grade aluminium ​
• Coreless, ball valve system opens and closes with integrated lever ​
• ​Stainless steel ball valve with seals and O-rings ​
• ​Maximum air flow efficiency delivers up to (230/245%) higher flow than Presta valves - Dependant on valve version​
• ​Universal valve head on the hybrid valve is compatible with most screw on and push fit pumps ​
• ​Serviceable design with spanner flats on the head, lever and body ​
• 4-way tyre insert air flow base is compatible with most tubeless inserts ​
• ​4mm machined hex key slot for easy installation / removal ​
• ​Supplied with various rubber bases to optimise fit and seal with multiple rim types
• Available in 25, 35, Large valve stems to suit different rim depths

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
• Sealant dipstick also available separately