What size rear Tyres for GT86?
Rear tyres on the GT86 typically match the front tyre width and profile for stock configurations: 215/45R17 on 17-inch wheels, or 225/40R18 on 18-inch wheels.
Stock rear tyre sizes by wheel size
17-inch wheels
For GT86 models equipped with 17-inch wheels, the common factory rear tyre size is:
- 215/45R17
Note: Always verify with the vehicle’s official tyre placard, as regional variations can occur.
18-inch wheels
For GT86 models with 18-inch wheels, the typical rear tyre size is:
- 225/40R18
Some markets or aftermarket configurations may differ; always confirm the exact size on your car’s placard or in the owner's manual.
Important considerations when choosing rear tyres
When replacing rear tyres, it’s important to align with OEM specifications to preserve handling, traction control, and speedometer accuracy. The GT86 performs best when front and rear tyres are matched to the factory sizes or within approved equivalents.
- Match front and rear sizes to maintain balanced handling, especially on twisty roads or track days.
- Be aware that changing tyre width or profile can affect ABS/ESP calibration and accelerate wear differences between axles.
- Choose tyres with a compatible load index and speed rating to meet or exceed OEM specs.
- Consider climate and driving conditions when selecting tyres (summer, winter, or all-season compounds).
Sticking to the OEM-recommended sizes is the simplest way to maintain the GT86’s intended balance and performance. If you plan a deviation for a performance goal, consult a tyre and suspension specialist.
How to verify your exact rear tyre size
Follow these steps to confirm the correct rear tyre size for your GT86:
- Inspect the rear tyre sidewall to read the size stamped on it (for example, 215/45R17 or 225/40R18).
- Check the tyre placard on the door jamb or inside the fuel filler door for the official OEM specification for your model/year.
- Consult the owner’s manual or Toyota’s official specification sheet for your VIN, as regional differences can apply.
Verify the size before purchasing replacements to ensure proper fit and vehicle performance.
Summary
In most GT86 configurations, rear tyre size follows the wheel diameter: 215/45R17 for 17-inch setups and 225/40R18 for 18-inch setups. Always confirm with the vehicle’s placard or owner’s manual, as regional and trim variations can occur. Keeping to the OEM sizes helps preserve handling, safety systems, and overall driving experience.
