Power Tank Monster Valve Replacement Threaded Stem

The Power Tank Monster Valve Replacement Threaded Stem is a hollow stainless steel stem that screws into the bottom of an existing Monster Valve body, available in three lengths to suit different wheel mounting configurations. These stems are intended only for modifying or customizing an already-installed Monster Valve, not as a standalone valve or a complete replacement unit. Short (20mm), Medium (36mm), and Long (41mm) lengths cover tap-mount, standard pre-drilled, and spacer-extended pre-drilled applications respectively.

The Right Stem for the Right Mount

Wheel mounting geometry varies enough between vehicles and wheel brands that a single stem length cannot cover every installation. The Short 20mm stem is designed for tap mounting and uses a flat seal, which seats flush against a tapped hole without a pre-drilled valve stem bore. The Medium 36mm stem is the standard length for the MV-FLAT2 Monster Valve and works in pre-drilled valve stem holes with no spacer or a 6mm spacer, making it the most broadly applicable option for common wheel setups. Choosing the correct length before installation prevents seal misalignment and ensures the Monster Valve body sits properly against the wheel.

Stainless Steel Construction

Each stem is machined from stainless steel with 3/16-24 threads, matching the thread specification of the Monster Valve body. Stainless steel resists the corrosion that comes with exposure to road salt, mud, and repeated airing-down cycles. This matters for a component that lives inside a wheel and is subject to pressure cycling every time a tire is inflated or deflated.

Features

• Three lengths available: Short 20mm, Medium 36mm, and Long 41mm to match different wheel mounting configurations
• Stainless steel construction: 3/16-24 threads machined to match Monster Valve body specifications
• Seal compatibility stated per length: Short uses a flat seal; Medium and Long use a mushroom seal
• Spacer compatibility: Medium works with no spacer or a 6mm spacer; Long works with a 6mm or 12mm spacer in pre-drilled holes

Specifications

Who This Is For and Isn't

These threaded stems suit Monster Valve owners who need to modify or customize their valve setup for a specific wheel mounting configuration, particularly those switching between tap-mount and pre-drilled-hole installations or adding spacers to accommodate wheel thickness.

These stems are not a complete Monster Valve and will not function without an existing Monster Valve body. The Long 41mm stem is a custom order only and may not be available for immediate shipment. The required flat or mushroom seal is not included and must be sourced separately.

Common Questions

Which stem length should I choose for a standard Monster Valve installation?

The Medium 36mm stem is the standard length for the MV-FLAT2 Monster Valve and fits pre-drilled valve stem holes with no spacer or a 6mm spacer. For tap-mount applications, the Short 20mm stem with a flat seal is the correct choice. The Long 41mm stem is a custom-order option for pre-drilled holes requiring a 6mm or 12mm spacer.

Do these stems include the seal needed for installation?

The Power Tank Monster Valve Replacement Threaded Stems do not include seals. The Short 20mm stem requires a flat seal; the Medium 36mm and Long 41mm stems each require a mushroom seal. Seals must be sourced separately before installation.

What thread specification do these stems use?

All three Monster Valve Replacement Threaded Stem lengths use 3/16-24 stainless steel threads, which match the thread specification of the Monster Valve body. This thread size is specific to the Monster Valve system and is not a universal valve stem thread.

Can these stems be used without an existing Monster Valve body?

No. The Monster Valve Replacement Threaded Stems screw into the bottom of an existing Monster Valve body and are not functional as standalone components. They are intended only for modifying or customizing a Monster Valve that is already installed or being rebuilt.