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migueljuan
Can I change the width of my tires?
I have a Peugeot 206 SW with 205/45/16 summer tires. I now need to buy winter tires, but am finding that 205/45 tires seem to be considerably more expensive than, say, 205/55 or 195/55 (all for 16 inch). Maybe 55% height tires are more standard and therefore cheaper?
195/55 is the cheapest, so if this is an option, I would definitely switch. The question is, given my 16 inch rims, can I use a tire with a different width? I understand that both 205/55 and 195/55 will result in a larger, taller tire. What are the implications of this?
45 profile means 45% section height, so to preserve the same height going to a 55% profile, you say
N*0.55 = 205*0.45
or
N = 205 * 0.45/0.55 = 167.
So you'd need to put on 165/55 to preserve the same height, which sounds maybe ridiculously narrow. Or the reverse being true that if you run the 195/55 it would be much taller.
ok 16" = 406mm
height with 205/45 is 406mm+2*0.45*205mm=59.05cm
height with 195/55 is 406mm+2*0.55*195mm=62.05cm
Difference in final drive ratio (speedometer correction)
62.05/59.05 = 1.05... so speedometer and odometer will read 5% slower than actual speed or mileage.
When I look on TireRack.com I find what I think is a reasonable deal for a tire in your original size
205/45/16
Dunlop SP Winter Sport M3
(Performance Winter)
for $117 each. And when I search for 195/55 the prices are similar. Maybe supply and demand are different by country where you are... usually what has the best price is what sells the most volume.
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