Plus sizing tires means increasing the wheel size while reducing the tire sidewall, keeping the overall diameter (OD) close to the original specification.
This upgrade improves vehicle appearance and handling-but only if done correctly.
What Is Plus Sizing?
Typical upgrades include:
Plus 1: Larger wheel + lower profile tire
Plus 2 / Plus 3: Further increases in wheel size
👉 The key rule is to maintain similar overall diameter to avoid performance issues.
Benefits of Plus Sizing Tires
Improved Handling – Better cornering and steering response
Enhanced Appearance – More aggressive and sporty look
Increased Stability – Wider tires improve road contact
Important Rules for Safe Plus Sizing
Maintain original overall diameter (OD)
Use equal or higher load index (LI)
Use equal or higher speed rating (SR)
👉 Incorrect sizing can affect braking, handling, and safety.
Example of Plus Sizing
OE: 205/55R16
Plus 1: 225/45R17
Plus 2: 235/40R18
👉 Each upgrade keeps the overall diameter close to stock.
Special Considerations for SUVs & Trucks
For larger vehicles, increasing tire size may:
Affect speedometer accuracy
Impact ABS and stability systems
Increase suspension wear
👉 Larger diameter changes should be done carefully.
Plus sizing tires can significantly improve both appearance and performance, but it must follow proper guidelines. Balancing size, load rating, and overall diameter is essential for safe and effective upgrades.