Upgrading tire size
07-15-2003, 11:46 AM
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Upgrading tire size
Is anyone thinking of upgarding their tires to 245/45 or 40/18??
Also I've noticed that the 350Z has different tire sizes on the front and back. Is this a possiblity on the RX? It looks like there is lots of room for an increase in tire size according to the wheel wells.
Looking for your thoughts!
JayDee
Also I've noticed that the 350Z has different tire sizes on the front and back. Is this a possiblity on the RX? It looks like there is lots of room for an increase in tire size according to the wheel wells.
Looking for your thoughts!
JayDee
07-15-2003, 01:07 PM
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If you go with a different overall diameter you will have to account for the rpm/speedo/odometer differences.
I wouldn't put a staggered tire setup, ie rear tires wider/larger than the front on a car that doesn't come stock like that. Staggered tire setups are done for a reason and are designed to fit the suspension. If the 8 is non staggered, keep it that way.
I wouldn't put a staggered tire setup, ie rear tires wider/larger than the front on a car that doesn't come stock like that. Staggered tire setups are done for a reason and are designed to fit the suspension. If the 8 is non staggered, keep it that way.
07-15-2003, 01:22 PM
#4
VW coulda had it...
Hmmm; accordion to my calculations, a 245-40/18 would only be about .25" smaller in O.D. than a 225-45/18. I would think this would have a pretty insignificant effect on meter readings.
I agree with Quick_lude about using two different sizes, especially if the car has 50-50 weight distribution and fairly neutral handling.
I agree with Quick_lude about using two different sizes, especially if the car has 50-50 weight distribution and fairly neutral handling.
07-15-2003, 01:31 PM
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Originally posted by colin204
245/40/18 should not be a problem but it will be about .9 inches shorter. There are a lot more tire choices in the 40 series vs the 45 series.
245/40/18 should not be a problem but it will be about .9 inches shorter. There are a lot more tire choices in the 40 series vs the 45 series.
07-15-2003, 02:17 PM
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When I looked up the height of the 2 sizes they were on 2 different rim widths. On the same rim width the difference is only about .2 to .3. The difference between 7.5 and 8 inch wide rim made it the .9 difference.
07-15-2003, 02:34 PM
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This is a good error calculator: http://www.mindspring.com/~toy4two/tire.html
According to that, the 245/40/18 is only off by .99% from a 225/45/18 tire. So your speedometer will show a slower speed and your odometer will be off by 10km less over a 1000km distance.
According to that, the 245/40/18 is only off by .99% from a 225/45/18 tire. So your speedometer will show a slower speed and your odometer will be off by 10km less over a 1000km distance.
12-11-2003, 10:16 PM
#10
"...I'm a Dapper Dan man"
Originally posted by colin204
245/40/18 should not be a problem but it will be about .9 inches shorter. There are a lot more tire choices in the 40 series vs the 45 series.
245/40/18 should not be a problem but it will be about .9 inches shorter. There are a lot more tire choices in the 40 series vs the 45 series.
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