The Peaty’s MK2 Tubeless Valves are more than just a stylish upgrade for your wheels; they are a high-performance solution to common tubeless frustrations. Machined from lightweight 7075 aluminium, these valves are designed to be durable enough for the roughest trails while remaining light enough for elite racing. The 42mm length is the "sweet spot" for most modern mountain bike and gravel rims, providing ample clearance for pump heads without excessive protrusion.
The real magic lies in the Base-X design. Unlike standard round bungs, the MK2 features four large channels machined into the base of the valve. This ensures that even if your tyre insert is pushed against the valve, air and sealant can still flow freely into the tyre, preventing the dreaded "clogged valve" syndrome. Each set comes with a world-first integrated valve core remover cap, making it incredibly easy to top up sealant or remove cores for rapid inflation without needing to hunt through your toolbox.
Key Features
7075 Aluminium Construction: High-strength, lightweight alloy ensures the valves won't snap or bend under pressure.
Base-X Technology: Integrated airflow channels prevent tyre inserts from blocking the valve, ensuring easy inflation and pressure adjustments.
Integrated Valve Core Tool: The stylish CNC-machined cap doubles as a core remover, perfect for trailside repairs or sealant top-ups.
Crush-Core Rubber: The oversized soft rubber base creates a superior airtight seal on a wide variety of rim profiles.
Eco-Friendly Packaging: Delivered in recycled cardboard packaging, aligning with Peaty's commitment to sustainability.
Specifications
| Feature | Details |
| Material | CNC Machined 7075 Aluminium |
| Valve Length | 42mm |
| Valve Type | Presta |
| Compatibility | Tubeless Rims (MTB, Gravel, Road) |
| Base Design | 4-Channel Base-X (Insert Compatible) |
| Included | 2x Valves, 2x Caps (1x Tool Cap), 2x Locking Nuts |
| Weight | Approx. 12g per pair |
✅ Why This IS For You
Tyre Insert Users: If you run CushCore or similar inserts, the Base-X channels are essential for preventing airflow blockages.
The Detail Oriented: You want your bike to look as good as it performs—the premium anodised finish is available in various colours to match your build.
Trailside Mechanics: You appreciate having a valve core tool permanently attached to your bike for quick fixes.
Weight Conscious: At roughly 12g per pair, these offer a significant weight saving over standard brass tubeless valves.
Setup Enthusiasts: You want a valve that seals first time, every time, thanks to the high-quality oversized rubber bungs.
❌ Why This May NOT Be For You
Deep Section Rims: If you are running 50mm+ deep aero road rims, the 42mm length will be too short; you will need the 60mm or 80mm version.
Strict Budget Builds: These are a premium component; if you just need "functional" valves, basic alloy or brass options are cheaper.
Schrader Users: These are strictly Presta-only valves.
BFC PRO TIP
When installing these, don't over-tighten the locking nut with pliers; finger-tight is usually sufficient to create a perfect seal. If you do find you have a slow leak at the valve, try dipping the rubber base in a bit of fresh sealant before inserting it into the rim. This creates a "gasket" effect that fills in any tiny imperfections in the rim tape or the valve hole itself!
