Most wheel and tire returns are avoidable. They happen because a specification was assumed rather than checked, and the assumption only surfaces once the box is open and the wheel is halfway onto the studs. These guides cover the specifications that decide whether a setup bolts on cleanly.
Start with the wheel fitment guide if you are new to this. It covers all five specifications in order and links out to the deeper guides where you need them.
Fitment guides
Wheel Fitment Guide
The complete fitment checklist: bolt pattern, hub bore, diameter, width, offset, overall diameter and load rating, in the order you should check them.
Bolt Pattern Guide
How to measure 4, 5, 6 and 8 lug patterns correctly, a bolt pattern chart covering 20 popular vehicles, and the near-miss patterns that catch people out.
Wheel Offset and Backspacing
What positive and negative offset do to stance, rubbing, scrub radius and wheel bearings, with a conversion formula and target offsets by build type.
How to Read a Tire Size
Decode 275/65R18 116T completely: section width, aspect ratio, load index, speed rating, LT and XL prefixes, load range, DOT date codes and UTQG.
Tire Size Conversion Chart
Metric to flotation conversions for 16, 17, 18, 20 and 22 inch wheels, plus the 3 percent rule and a speedometer error table.
All-Terrain vs Mud-Terrain
A side by side comparison on tread life, noise, wet grip, snow, fuel economy and off-road capability, and a decision process for choosing.
Still not sure?
Send us your year, model, trim, current suspension setup and what you are trying to achieve. We would rather spend ten minutes confirming a fitment than process a return, and we will tell you if the setup you want is not going to work.