First, let’s cover the many positives of UTV wheel spacers. When properly installed, these handy mods can:
As for the trade-offs and potential concerns, spacers can add stress on wheel bearing and suspension by increasing leverage. With quality bearings, however, you can reliably manage this issue. Also, you want to be weary of increasing your width too much if you’re already hard-pressed for clearance on narrow trails.
Most spacers will typically put you in the neighborhood of between one to four inches of total width increase, with two inches or less being more popular. For stability improvement with minimal downsides: 1-1.5 inch spacers provide noticeable benefit without excessive bearing stress or trail width concerns. For maximum stability or serious tire clearance: 2-inch spacers work, but verify your trails accommodate width and upgrade to quality bearings if running heavy loads or large tires.
Also, a quick note on front vs. rear spacing: some applications benefit from different spacing front and rear. Sport UTVs: often run slightly wider rear spacing than front, improving rear stability without excessive front track width that increases steering effort. Work machines: might use equal spacing all around or slightly wider front for improved front-end stability under load. Most riders: run equal spacing all around for balanced handling.
Wheel adapters serve different purposes than spacers. They convert bolt patterns, allowing wheels designed for different machines to fit yours.
Quality adapters use thick billet aluminum with proper hub-centric registers on both machine and wheel sides, ensuring proper centering throughout the system. They're essentially thick spacers with different bolt patterns on machine and wheel sides. Trade-offs: adapters add weight (often more than simple spacers due to thickness required for dual bolt patterns), add track width (typically 1.5-2 inches minimum per side from adapter thickness), and cost more than spacers.
Only use adapters when necessary. If wheels exist in your stock bolt pattern, they're better choices than adapting different patterns.
Will UTV spacers cause a bearing failure?
Possibly, but there are plenty of steps you can take to prevent this, including going with a high-quality spacer as well as strong bearings.
How much thread engagement do I have to have with spacers that slip on?
Minimum safe engagement: 1.5 times the stud diameter must be engaged in lug nuts. For 12mm studs (common UTV size), minimum engagement is 18mm (roughly 0.7 inches).
Will spacers affect my machine's warranty?
Possibly. Spacers change your suspension geometry, which a manufacturer might use to justify denial of your claim if that claim is relevant enough to your suspension/drivetrain. Always check with your manufacturer!