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Motors FAQ>Wheels and tyres>Will these tyres fit my car?

colm_mcm · 2005-12-20 23:29:24

Understanding tyre sizes 1 Section width: This is the width of the tyre, measured in millimeters 2 Aspect ratio/profile: This measures the height of the tyres sidewall as a percentage of the section width. For example, a 195/50 R16 tyre has a sidewall height of 97.5mm, a 215/50 R16 tyre has a sidewall height of 107.5mm 3…

20-12-2005 11:29pm

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colm_mcm

Registered Users, Registered Users 2 Posts: 73,520 ✭✭✭✭

Join Date: December 2005

Posts: 72242

Understanding tyre sizes

1 Section width:
This is the width of the tyre, measured in millimeters

2 Aspect ratio/profile:
This measures the height of the tyres sidewall as a percentage of the section width.
For example, a 195/50 R16 tyre has a sidewall height of 97.5mm, a 215/50 R16 tyre has a sidewall height of 107.5mm

3 Rim size:
This is the size of rim the tyre is designed to fit, measured in inches.

4 Load index:
This value determines the amount of weight a tyre can carry. Lower profile tyres tend to have lower ratings. If you are replacing your tyres, is is important to have tyres with the same rating or a higher rating than the standard tyre size.

5 Speed rating
The speed rating of any tyre is a measurement of the max safe speed the tyre can carry a load under specified conditions. It is also shows how the tyre will handle at lower speeds. A higher rated tyre will give you better traction and improved steering response.

Click here to use a tyre size comparison tool

Related to this:
Will these wheels fit my car?

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