Вот что нашел у буржуев, раз наши никто не отвечает.
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Wheel Size
When you are considering tyres, you need to consider your wheel size. The standard VR-4 16" alloys are adequate, but many opt to increase their diametre to 17", 18" or even bigger.
Use this Calculator to see the impact of selecting various sizes. You want to ensure that any increase in diametre does not affect your overall circumference. Should should stay within -1% to 1%, to ensure that your intruments remain reasonably accurate.
Be aware that the higher the diametre, the lower the profile of the tyre and consequently, the harder the ride and the increase in price. It has been reported the price difference in tyres from 17" to 18" is almost double.
NOTE: If you are planning to upgrade your brakes, you will need to increase the wheel size. Anyone thinking of upgrading the calipers needs to consider wheel size and offset (e.g. Oz Supperleggera's require a +45 offset, with KAD 6 pot calipers)
Wheels
This is generally a personal choice. Be aware that the more spokes you have the more cleaning you have to do. There is an endless variety of styles out there.
Tyre Size
Finally we get to the tyres. These are the recommended profiles for the common rim choices.
16" Rims = 225/50 R16
17" Rims = 225/45 R17
18" Rims = 225/40 R18
7.5" width go with 225 and 8" go with 235[/b]
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