2 pc Sixity 1 in Thick 5x4.5 to 5x5.5 Wheel Adapters - Increase

In this review of the 2 pc Sixity 1 in Thick 5x4.5 to 5x5.5 Wheel Adapters, the bottom line is simple: these adapters are for pickup truck and SUV owners who want to widen their tire options or correct bolt pattern fit without hub modification. The kit converts a 5x4.5 bolt pattern to 5x5.5 while adding 1 in of offset, which is the single biggest reason to buy - it increases tire-to-frame clearance and lets you fit wider, higher-traction tires or aftermarket suspension changes with minimal fuss. Installation is straightforward when you match the adapter bolt type to your existing hub.

Key Features

• 1 in thickness: The spacer adds a full inch of clearance to move wheels outward and accommodate wider tires or lift kits.
• 5x4.5 to 5x5.5 conversion: This adapter kit lets vehicles with a 5x4.5 bolt pattern accept wheels drilled for 5x5.5, expanding wheel choices.
• No hub modification: By selecting the adapter that uses the same bolt type as the hub, you can reuse existing lug nuts and avoid permanent hub changes.
• Forged, heat-treated bolts: The wheel bolts are hardened to metric class 10.9 (SAE Grade 8) for strong, corrosion-resistant fasteners.
• Corrosion resistance: Materials and heat treatment provide improved tensile strength and resistance to rust compared with common aluminum spacers.
• Two-piece kit: Sold as a 2 pack so one set covers both sides of the axle, making a complete axle conversion simple.

Who It's For

The Sixity 1 in wheel adapters are aimed at pickup truck and SUV owners who need additional tire-to-frame clearance or who want to mount wheels with a 5x5.5 bolt pattern on a 5x4.5 hub. They suit owners fitting wider tires, installing lift or lowering kits, or swapping wheels for a different bolt pattern while keeping existing lug hardware.

These adapters are not for someone seeking cosmetic-only changes without regard to load or fitment, nor are they a substitute for professional suspension work when excessive spacing or incorrect backspacing is a concern. Vehicles requiring hub-centric adapters for high-performance applications should consider hub-centric options instead of generic lug-centric adapters.

Pros & Cons

Pros

• Increases tire-to-frame clearance by 1 in so wider tires and lift setups fit more easily.
• Converts a 5x4.5 bolt pattern to 5x5.5, expanding compatible wheel choices.
• High-strength, forged bolts heat-treated to metric class 10.9 for durability and corrosion resistance.

Cons

• Uses lug-centric attachment; some buyers may prefer hub-centric adapters for certain high-load or performance applications.
• Not a permanent hub modification solution - intended as an adapter/spacer rather than a structural hub replacement.

Specifications

Product type	Wheel adapter / spacer kit
Thickness	1 in
Bolt pattern conversion	5x4.5 to 5x5.5
Quantity	2 pc kit (one axle)
Bolt material / grade	Forged, heat-treated bolts, metric class 10.9 (SAE Grade 8)
Primary benefit	Increases tire-to-frame clearance for wider tires or lift kits

Our Verdict

The Sixity 1 in 5x4.5 to 5x5.5 wheel adapters are a practical, value-focused choice for truck and SUV owners who need an easy bolt-pattern conversion and extra clearance for wider tires or suspension changes. With hardened bolts and a simple 2 pc kit, they deliver an affordable way to expand wheel options while avoiding hub modification, though buyers wanting hub-centric solutions for heavy-duty or high-performance use should look elsewhere.

Frequently Asked Questions

Will I need to modify my hub to install these adapters?
You do not need to modify the vehicle hub if you choose an adapter with the same bolt type as your hub; the design allows reuse of existing lug nuts.

How much clearance does the adapter add?
The spacer adds 1 in of offset, which increases tire-to-frame clearance to help fit wider or taller tires.

Do the adapters resist corrosion?
Yes, the bolts are forged and heat-treated to metric class 10.9, providing improved tensile strength and corrosion resistance compared with common aluminum fasteners.