Peaty's MK2 Tubeless Presta Valves 7075 Aluminium - Black 42mm & 60mm

In this review of the Peaty's X Chris King MK2 Tubeless Valves the bottom line is simple: these are for riders who want a durable, serviceable tubeless valve that also looks the part. The reviewer found the integrated tools and high strength 7075 aluminium construction to be the single biggest reason to buy, because they remove a lot of small hassles - topping up sealant, removing cores, or tightening spokes - whether in the workshop or on a trailside fix. This review focuses on how well those features work in real use and which riders will get the most value.

Key Features

• Integrated tool caps: The valve core remover and spoke key cap let you remove valve cores and tighten standard 3.4mm spoke nipples without carrying extra tools, saving time during maintenance.
• X-cut base compatibility: Channels cut into the base allow air and sealant to pass through when using tyre inserts, so these valves work alongside most insert systems.
• 7075 aluminium build: Premium lightweight, high strength aluminium gives a durable stem that resists corrosion and stands up to regular trail use.
• Easy fit and seal: Large soft rubber bases and integrated O-rings prevent rim scratches and create an airtight seal on a wide range of tubeless rims.
• Two lengths: Available in 42mm and 60mm to suit different rim depths from road to enduro and DH setups, reducing the need to trim stems.

Who It's For

These valves are aimed at riders who use tubeless tyres across mountain bike, gravel and road disciplines and want a reliable, serviceable valve that doubles as a field tool. If you run tyre inserts or CushCore-style systems, the X-cut base and pass-through channels make these a practical choice.

Less suitable are riders who want ultra-minimalist or disposable valve stems, or those requiring specialised spoke keys outside the standard 3.4mm nipple size. Also, if you need a valve with non-standard core threading or a different integrated tool size, look elsewhere.

Pros & Cons

Pros

• Integrated valve core remover and spoke key cap reduce toolkit clutter and speed roadside maintenance.
• The X-cut base and channels are compatible with inserts, maintaining sealant flow when inserts are installed.
• High-quality 7075 aluminium construction feels robust and matches high-end wheelsets in finish and durability.

Cons

• Only one spoke key size is built in (for standard 3.4mm nipples), so other nipple sizes require a separate tool.

Specifications

Our Verdict

Peaty's MK2 valves are a practical upgrade for cyclists who value durability and multifunctional components; the integrated core remover and spoke key are genuinely useful and the X-cut base makes them compatible with most inserts. For riders who want a long-lasting, service-friendly tubeless valve that also looks high quality, these offer strong value despite the limitation of a single spoke key size.

Frequently Asked Questions

Are these valves compatible with tyre inserts?
Yes, the X-cut base with channels is designed to allow air and sealant to pass through when inserts are fitted, making them compatible with most insert systems.

Do the caps fit all spoke nipples?
The integrated spoke key is sized for standard 3.4mm spoke nipples; other nipple sizes will require a separate spoke tool.

What sizes are available?
This product is offered in 42mm and 60mm lengths to suit a range of rim depths.