4x110 to 4x156 Wheel Adapters 25mm Spacer for Pioneer & Big Red

In this review the focus is on a simple, purpose-built wheel spacer set for select Honda UTVs. The GAsupply 25mm 4x110 to 4x156 adapters are intended for owners of Pioneer 500, Pioneer 700-2, Pioneer 700-4 and Big Red MUV700 who want to run wider or more aggressive tires without changing hubs. The bottom line: these CNC machined aluminum adapters offer a straightforward way to increase tire clearance and stance while keeping weight low and corrosion resistance high.

Key Features

• Fitment: Direct fit for specified Honda Pioneer and Big Red models, so buyers save time confirming compatibility for those model years.
• Material: CNC machined from 6061-T6 aluminum billet, providing a combination of strength and light weight that limits added unsprung mass.
• Thickness: The 25mm (1 in) spacer gives measurable lateral offset to allow wider tires and a wider track for improved style and traction.
• Hardware: Pre-installed 10.9 grade bolts and 12x1.5 studs provide a robust connection designed for UTV wheel loads.
• Finish: Anodized surface adds corrosion resistance so the adapters resist rust and fading in off-road conditions.
• Hub bore and patterns: 74.1mm hub bore with vehicle bolt pattern 4x110mm and wheel bolt pattern 4x156mm for matched fit on listed vehicles.

Who It's For

This kit is aimed at Honda UTV owners who have one of the listed model-year vehicles and want to install wider, larger or high-traction tires without buying new hubs or wheels. It is particularly useful for riders who want a more aggressive stance and increased tire clearance for trail or utility use.

It is not for vehicles with different stud threads; these adapters only fit wheels with 12x1.5 studs and will not fit 3/8-24 or 12x1.25 wheel studs. Buyers unsure about stud pitch or fit should verify wheel hardware before purchase or contact the seller for clarification.

Pros & Cons

Pros

• Lightweight CNC 6061-T6 construction keeps unsprung weight low while adding strength.
• Pre-installed 10.9 grade bolts simplify installation and reduce the chance of missing hardware.
• Anodized finish improves corrosion resistance for durability in off-road conditions.
• Specifically matched bolt patterns and hub bore for listed Honda models ensure a clean fit when used as intended.

Cons

• Only compatible with wheels using 12x1.5 studs, so many wheels with different thread pitches will not fit.
• As a 25mm spacer it alters track width modestly; riders seeking extreme offset will need different solutions.

Specifications

Vehicle Bolt Pattern	4x110mm
Wheel Bolt Pattern	4x156mm
Hub Bore	74.1mm
Thickness	25mm (1 in)
Thread Pitch	12x1.5mm
Quantity	4pcs, 4-lug adapters
Material / Finish	6061-T6 aluminum, anodized silver

Our Verdict

The GAsupply 25mm 4x110 to 4x156 wheel adapters are a practical, well-made option for Honda Pioneer and Big Red owners who need a reliable way to fit wider tires and improve stance. With CNC aluminum construction, quality hardware and an anodized finish, they deliver good value when used with compatible 12x1.5 stud wheels.

Frequently Asked Questions

Will these fit my Pioneer 700-4?
They fit Pioneer 700-4 models from 2014-2021 when your wheels use 12x1.5 studs and you need 4x110 to 4x156 adapters.

Do they include bolts and studs?
The adapters come pre-installed with 10.9 grade bolts and include the 12x1.5 studs required for the fit described.

Are they rust resistant for off-road use?
The anodized surface improves corrosion resistance and reduces the chance of rust and fading in typical off-road conditions.