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How's This Work? Performance Tires

How's This Work? Performance Tires

What are Performance Tires?

After the unveiling of the 2017 Honda Civic Si Prototype, some of you might’ve noticed that it will be equipped with high-performance, Y-speed tires. And now, some of you might be asking… what in the world are performance tires, let alone Y-speed tires? Well, we thought we’d answer those questions in this week’s How’s This Work, by analyzing Performance Tires.

[ LAST WEEK: What is Dual Exhaust? ]

What is a tire type?

For someone who doesn’t know much about tires, you’ve probably glossed right over the tire type when looking into purchasing a new vehicle. Reading something that looks like 235/35R19 Y – which is the designation for the tires that will come equipped on the 2017 Honda Civic Si – can be hard to understand at first. So we thought, for starters, that we would give you the rundown on how to read this.

  • 235: The first number, in this case 235, represents with width of the tire in millimetres.
  • 35: The second number, after the slash, represents the aspect ratio of the tire. So in this case, the height of the tire is equal to 35% of the width.
  • R: The first letter depicts the construction of the tire. The R in this example means the tires were constructed radially.
  • 19: The last number is always the same as size of the wheel, as it depicts the diameter of the tire, in Civic Si Prototype’s case: 19”.
  • Y: Finally, the last letter represents the tire’s speed rating, with Y being the highest rating a tire can receive.

Tire speed ratings start out at L, which tells you that the tire can withstand a maximum speed of 120 km/h. M, N, P, Q, R, S, T, U and H are the next 9 ratings in order, going up by 10 km/h consecutively, resulting in the H-speed tires able to withstand 210 km/h. After H, you can have V-speed, W-speed or Y-speed, which represent 240 km/h, 270 km/h and 300 km/h respectively.


In other words, the 2017 Honda Civic Si is going to be a fast, fast vehicle. If you have any questions, feel free to give us a call.

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