Peaty's X Chris King MK2 Tubeless Valves Presta - Durable, Tooled Caps

Our review of Peaty's X Chris King MK2 Tubeless Valves finds them best suited to riders who want durable, well-engineered valve stems that add both function and style to tubeless setups. The single biggest reason to buy is the integrated tool caps: the valve core remover and spoke key are built into the caps, making roadside sealant top ups and on-wheel spoke tweaks genuinely quicker and less fiddly than carrying separate tools.

Key Features

• Integrated valve core remover: The removable cap has a built-in core tool so adding sealant or removing the core is fast without needing extra bits.
• Spoke key cap: A second cap doubles as a 3.4mm spoke wrench so small spoke adjustments can be made at the wheel, useful on the trail or in the garage.
• X-cut base for insert compatibility: Channels cut into the valve base let air and sealant pass when using tire inserts, so they work with most insert systems.
• O-ring protected fit: Integrated O-rings prevent the lock rings from scratching rims and help create an airtight seal on different rim materials.
• 7075 aluminium construction: High-strength lightweight material provides a premium feel and durability for MTB, road and gravel use.
• Two lengths available: Offered in 42mm and 60mm to suit a wide range of rim depths and setups.

Who It's For

These valves are aimed at cyclists who run tubeless tires across mountain bike, road, gravel and cyclocross disciplines and who value on-bike convenience and durable parts. The integrated tool caps particularly benefit riders who carry minimal tools, race mechanics who need quick sealant access, and anyone using tire inserts who needs a valve that passes sealant reliably.

Riders who should look elsewhere include those who need thread-on valve extenders for very deep rims beyond 60mm, or people who prefer disposable low-cost valve stems without built-in tools. Also note the color options reflect the Chris King collaboration and the finish is a visual accent rather than a performance gimmick.

Pros & Cons

Pros

• Built-in valve core remover speeds sealant top ups and keeps a tool on-bike.
• Integrated spoke key cap allows quick spoke adjustments without extra tools.
• Solid 7075 aluminium construction feels premium and resists damage.
• X-cut base and O-rings improve compatibility with inserts and protect rims.

Cons

• Only two lengths (42mm and 60mm) may not suit extremely deep rims requiring extenders.
• The premium finish and integrated tools add cost compared with basic valve stems.

Specifications

Our Verdict

The Peaty's X Chris King MK2 Tubeless Valves are a smart upgrade for riders who want a durable, tool-equipped valve that works with inserts and seals reliably. The integrated core remover and spoke key are genuinely useful on-ride conveniences, and the 7075 aluminium build makes them a long-lasting choice. They represent good value for anyone who values convenience and premium parts on their tubeless bike.

Frequently Asked Questions

Are these valves compatible with tire inserts?
Yes, the X-cut base and channels are designed to allow air and sealant through when using inserts.

Do they include valve cores or come in pairs?
The product ships as a pair of valves and is compatible with standard Presta valve cores; the caps include a core remover.

Will they fit deep carbon rims?
They come in 42mm and 60mm lengths; very deep rims may need additional extenders not included with the valves.