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What does 225/55zr17 mean?

1Answers
DiValeria
07/24/2025, 04:01:35 AM

225 indicates the width of the tire tread; 55 represents the aspect ratio of the tire, commonly understood as the thickness of the tire sidewall, calculated by multiplying the tread width by the aspect ratio; 17 is the size of the rim that the tire fits, with 17 meaning a 17-inch rim. The ZR in the tire specification 225/55ZR17 is a combined term, indicating that the tire's maximum applicable speed exceeds 240 km/h. Additional information: The wider the tire, the larger the contact area. Given the same tread pattern and material, a wider tire will provide better grip and traction when driving in a straight line.

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