Peaty's MK2 Tubeless Valves Presta 42mm & 60mm - Integrated Tool Caps

In this review the Peaty's X Chris King MK2 Tubeless Valves are examined for riders who want a tidy, durable tubeless setup with built-in workshop convenience. The bottom line: these valves are aimed at cyclists who value both function and finish - they pair lightweight 7075 aluminium construction with an integrated valve core remover and spoke key cap so topping up sealant or tightening a loose spoke is fast and clean. The reviewer found them easy to fit, compatible with inserts, and a tasteful way to add a useful tool to a wheel without extra bulk.

Key Features

• Integrated tool caps: The combined valve core remover and spoke key cap means one small piece handles both topping up sealant and adjusting standard 3.4mm spoke nipples, saving time on the trail or in the shop.
• X-cut base for inserts: Channels cut into the valve base allow air and sealant to pass when a tire insert is pressed against it, ensuring compatibility with most insert systems.
• O-ring protected fit: Built-in o-rings prevent the lock rings from scratching rims and help create an airtight seal without fiddly extra parts.
• 7075 aluminium body: Premium lightweight high-strength alloy keeps weight low while remaining robust for MTB, road and gravel use, including carbon rims and enduro or DH duty.
• Two length options: Available in 42mm and 60mm to suit common rim depths so the valve will work across a wide range of wheelsets.
• Valves for life guarantee: Partnership with Chris King and Peaty's support promise long-term use and color-matched options that hold up over time.

Who It's For

The MK2 valves suit riders who run tubeless setups on mountain bikes, gravel bikes, cyclocross or road bikes and who want an integrated maintenance tool built into the valve. They are especially useful for people who use tire inserts or who prefer not to carry separate spoke keys and valve tools.

Less ideal for those using non-Presta valve systems, or riders who need a specialized spoke key size other than the standard 3.4mm nipple; also riders on ultra-deep rims should confirm which length fits before buying.

Pros & Cons

Pros

• Integrated spoke key and valve core remover consolidates tools and speeds roadside or workshop fixes.
• Lightweight, durable 7075 aluminium construction with precise finish and color options.
• X-cut base and channels deliver reliable insert compatibility and allow sealant flow.
• O-rings and large rubber base produce a clean, airtight fit without rim damage.

Cons

• Spoke key fits standard 3.4mm nipples only, so it may not suit some nonstandard wheels.
• Available lengths are 42mm and 60mm; extreme rim depths require checking fit before purchase.

Specifications

Our Verdict

The Peaty's MK2 Tubeless Valves are a practical upgrade for riders who want durable fittings and built-in tools without added weight or hassle. They deliver reliable sealing, tidy integration with tire inserts and a useful spoke key/valve core combo that simplifies maintenance. For most mountain, gravel and road tubeless riders these valves represent good value by replacing multiple small tools with one well-made component.

Frequently Asked Questions

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

Do the caps actually remove valve cores?
Yes, the cap incorporates a valve core remover and will allow topping up sealant without removing the valve from the rim.

What spoke nipple size does the integrated key fit?
The built-in spoke key is sized for standard 3.4mm spoke nipples; nonstandard nipple sizes may not fit.