Peaty's X Chris King MK2 Tubeless Valves Presta - Integrated Tool

In this review the Peaty's X Chris King MK2 Tubeless Valves are examined from the perspective of riders who demand simple maintenance and reliable sealing for tubeless setups. The single biggest reason to buy is the built-in utility: integrated valve core remover and a spoke key cap save time and bulk in the tool roll while the X-cut base and soft rubber seal deliver consistent airtight performance. The valves come in 42mm and 60mm lengths and use 7075 aluminum, so they suit a wide range of mountain, gravel and road rims where low weight and durability matter.

Key Features

• Integrated valve core remover cap: lets you remove or tighten the valve core on the trail without carrying a separate tool, speeding up sealant top-ups.
• Spoke key cap: includes a 3.4mm spoke nipple key to make minor spoke adjustments without digging through a toolbox.
• X-cut base: channels cut into the base are designed to pass air and sealant when used with tire inserts, improving compatibility with insert systems.
• Soft rubber base and o-rings: provide an airtight seal and protect rim finish from scratches while keeping installation simple.
• 7075 aluminum construction: offers a lightweight yet strong valve body that fits most tubeless setups including carbon and enduro rims.

Who It's For

The MK2 valves suit riders who run tubeless tires on mountain bikes, gravel rigs or road bikes and want built-in tools to reduce what they carry. They are particularly useful for riders who use tire inserts or who like quick sealant access during rides, and for workshop use where a compact spoke key is handy.

Less suitable are riders who need non-Presta valve systems or who prefer one-piece disposable valves rather than a durable, serviceable aluminum option. Also, if exact color matching is critical, be aware that some customers reported mixed accuracy versus product images.

Pros & Cons

Pros

• Integrated tools reduce what you need to carry and make on-trail repairs faster.
• Strong but lightweight 7075 aluminum construction balances durability and weight savings.
• X-cut base and insert compatibility make these valves versatile with CushCore-style systems and other inserts.
• Soft rubber bases and o-rings create a reliable airtight seal and protect rim finish.

Cons

• Color in photos may not always match the final product exactly, according to some customers.
• The included spoke key fits standard 3.4mm nipples only, so it may not suit all wheel builds.

Specifications

Brand	Peaty's x Chris King
Material	7075 aluminium
Valve Type	Presta tubeless
Lengths	42mm and 60mm
Included tools	Integrated valve core remover cap and 3.4mm spoke key cap
Compatibility	Insert compatible with X-cut base; MTB, road and gravel rims including carbon

Our Verdict

The Peaty's X Chris King MK2 Tubeless Valves are a practical upgrade for riders who want built-in maintenance tools, strong 7075 aluminium construction and broad insert compatibility. They represent good value for riders who service their own wheels or use inserts, offering durability and tidy on-trail utility. Those wanting exact color fidelity or non-Presta valves should shop elsewhere.

Frequently Asked Questions

Do these valves work with tire inserts?
Yes, the X-cut base is specifically designed to allow air and sealant to pass when inserts are pushed against the valve, making them compatible with common insert systems.

What tools are included on the valve caps?
Each valve has an integrated valve core remover cap and a spoke key cap sized for standard 3.4mm spoke nipples.

Are these valves suitable for carbon rims?
Yes, the valves are made from 7075 aluminium and include soft rubber bases and o-rings to protect rim finish, so they are suitable for carbon and other rim types.