Introduction
This article provides guidance on fitting larger tires, specifically 285/55R20 and 285/70R17, to a Toyota Prado 150, focusing on potential clearance issues and necessary modifications.
Problem
Fitting larger tires to a Prado 150 can lead to several issues:
- Upper Control Arm (UCA) Interference: The tire can rub against the upper control arm, especially with stock rims or incorrect offset.
- Mud Flap Contact: Larger diameter tires may rub on the mud flaps, particularly during turns or when braking.
- Suspension Limitations: Without a lift, larger tires are more likely to cause rubbing and clearance issues.
Solution
To fit larger tires successfully, consider the following:
- Wheel Offset: An offset of +10 is recommended to clear the upper control arm when using wider tires.
- Lift Kit: A 2-inch lift provides additional clearance, reducing the likelihood of mud flap contact. Even with a lift, mud flap modification or removal might be necessary.
Relevant Parts
- Tire Sizes Discussed:
- 285/55R20 (Outer Diameter approximately 830mm)
- 285/70R17 (Outer Diameter approximately 830mm)
- 285/50R20 (Outer Diameter approximately 795mm)
- 265/70R17 (As an alternative size if clearance is an issue)
- Recommended Wheel Offset: +10 is suggested for 285 width tires. +18 offset has been reported to have less than 15mm clearance to the upper control arm
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