The wheel and tire business is so confusing
02-25-2013, 12:57 PM
#16
Registered Member
Thread Starter
thanks i never really thought about that. am i correct in assuming that it wont be too drastic of a change between a 245 and a 255 tire?
02-25-2013, 01:14 PM
#17
^^I don't think so. More difference will be seen going from all season to a summer only tire. When I had my camaro, I ran 245/50/16 summer only in the none winter months, and a 215/60 or 65/16 for my snow tires. In the winter, my mpg would almost mirror my summer mpg (instead of going down). I attributed this to the snow tires having less friction (mpg goes up), but also to less btu's in the fuel (mpg goes down). I'm talking a few points here (2-4 mpg?). If you drive like a nut then fuel costs are probably a great concern for you 
Otherwise, it's something to keep in the back of your mind. Nothing is free, there's always a tradeoff.
Otherwise, it's something to keep in the back of your mind. Nothing is free, there's always a tradeoff.
02-25-2013, 02:35 PM
#18
Between tires of the same class, the mpg difference will be marginal. I have a couple hundred tanks on record including what i changed along the way (i.e. larger wheels, smaller wheels, lighter wheels... ditto on tires, lighter rotors, change in oil brand, etc....) My drive is pretty much the same day-in, day-out. The difference is negligible IMHO... about 1mpg at the most. I can vary mpg that much just by changing driving styles within the same week.
Here's an old post of mine, i haven't updated it in a while but do have the #'s from that point to the present and the variance is the same.
Mods vs. MPG - G35Driver
Here's an old post of mine, i haven't updated it in a while but do have the #'s from that point to the present and the variance is the same.
Mods vs. MPG - G35Driver
02-25-2013, 04:25 PM
#19
Between tires of the same class, the mpg difference will be marginal. I have a couple hundred tanks on record including what i changed along the way (i.e. larger wheels, smaller wheels, lighter wheels... ditto on tires, lighter rotors, change in oil brand, etc....) My drive is pretty much the same day-in, day-out. The difference is negligible IMHO... about 1mpg at the most. I can vary mpg that much just by changing driving styles within the same week.
Here's an old post of mine, i haven't updated it in a while but do have the #'s from that point to the present and the variance is the same.
Mods vs. MPG - G35Driver
Here's an old post of mine, i haven't updated it in a while but do have the #'s from that point to the present and the variance is the same.
Mods vs. MPG - G35Driver
02-25-2013, 04:56 PM
#20
To the OP, keep in mind, going wider (tires) will reduce your mpg too, even more so if that rubber is high performance sticky summer tires. If this is not a concern, disregard this comment. Just something to keep in mind.
Stock size on your car was 225/55/17 (all season) I believe. Going to a 245/40/19 will keep the speedo error to practically none. 255 is an odd size, though 255/40/19 would still keep the speedo error < 3%
Stock size on your car was 225/55/17 (all season) I believe. Going to a 245/40/19 will keep the speedo error to practically none. 255 is an odd size, though 255/40/19 would still keep the speedo error < 3%
i posted here a while back but no one every gave it much of a though or comment.
02-25-2013, 05:02 PM
#21
Registered Member
Thread Starter
here's the math worked out Tire Width - Nissan 370Z Forum you should read it too, op. might give you some baseline design options for selecting tires. gluck op.
i posted here a while back but no one every gave it much of a though or comment.
i posted here a while back but no one every gave it much of a though or comment.
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