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Old 03-14-2008, 01:54 PM   #1
Suprano
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Tire sizes?

Hey guys,

I'm looking to put some fresh tires on my 325 this spring and wanted to get something low profile. The rims I have on are the oem ones that came with the //M sport pack in 1995 and I wanted to go 215/40 r16. However, I was told by a tire vendor that the oem size should be 215/50/r16 and that by going with a lower profile tire I will be over revving the car and causing damage. Firstly, I am aware that a lower profile WILL affect my rpms, but will i be doing any serious damage to the car?

Any imput would be appreciated.

Also, if anyone knows a place that sells tires for a good price and des a good job on installs, let me know.

Rob
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Old 03-14-2008, 03:18 PM   #2
europrince
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Your stock tire size is 225/50/16.
The 215/50/16 is 1.57% shorter. The speedometer would read 1.589% too fast.
This is an acceptable trade.
The 215/40/16 is 8.38% shorter. The speedometer would read 9.127% too fast.
This is a dangerous tire on your car.

When changing tire sizes, we recommend staying within 3% of the diameter/height of the original tire. Any more than this and you face the risk of brake failure.

http://www.1010tires.com/tiresizecalculator.asp
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Old 03-14-2008, 03:20 PM   #3
europrince
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Steelcase Tires N Mags is a great shop with good prices, huge selection. I bought 3 sets from them and will by my next set next month.

905-479-8884


http://canada411.yellowpages.ca/bus/...c/2554162.html
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Old 03-14-2008, 04:23 PM   #4
Mystikal
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You won't be doing any damage, but the speedometer/odometer will read high. It will also look retarded on tires that small, you'd have MASSIVE fender gap (and not only at the top, but towards the front and back of the tire too).

Jay
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Old 03-15-2008, 02:34 PM   #5
Suprano
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So maybe a 225/45/r16 would probably be best then, I imagine.

thanks for the advice.

Rob
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Old 03-15-2008, 03:59 PM   #6
Dr. Flyview
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Here, play with this,

http://www.miata.net/garage/tirecalc.html

Going up in width will also increase the height slightly, but there's no reason why you should get "low profile" if your rims stay the same size. You always wanna keep the overall diameter of the wheel the same. If you want thinner tires, get bigger rims.
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