Thread: RCZ's 370Z Journal.
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Old 04-19-2011, 02:04 AM   #1431 (permalink)
ZForce
A True Z Fanatic
 
Join Date: Jul 2009
Location: Roseville, CA
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Drives: 09 370Z Tour + Sport
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Quote:
Originally Posted by ZForce View Post
Thanks man, I am thinking of going with stock up front (245/40) and 285/35 in the rears. The difference (1.57) in the

section width between the two staggered sizes is the same as the 265/35 & 305/30 combo. It's up from the OEM staggered tire difference of 1.18

255/35 was a thought but with the spring drop (1.2) it might drop too much and rub with 20mm spacers.
Quote:
Originally Posted by RCZ View Post
Hey ZForce,

I think you will be fine with the 255 and those spacers up front. There's plenty of room in those fenders. I would even go 265/285. I think thats

a great combo for the car. Someone had the 265/305 combo on their stock wheels and spacers, but you're gonna have to look it up. Not sure who it

was...maybe repipsa?


Try and get as much tire under the front fenders as possible, this car tends to understeer when you start playing around with bigger rears and

grippier tires.

I have 265/305 right now and haven't had a chance to really put them to the test yet
Actually you are dead on with suggesting 265/35/19 & 285/35/19. The 265 is closer to the stock ratio than the 255. And the section width

difference between the two staggered sizes is 0.79, that is better than the stock staggered differences at 1.18.

I am really eye balling the combo you recommend. Can you get up driveways without scraping on your 265's ?

I will have to search on...repipsa




Here are some numbers off of Americas Tire Calculator Tire Dimensions Made Simple - Discount Tire



Results......................245/40/19.....265/35/19
Totals are in inches...........Tire 1......Tire 2........ Difference
Sidewall Height:................ 3.86......3.65........... -0.21
Section Width:...................9.65......10.43.......... . 0.78
Overall Diameter:...............26.72......26.3........... .-0.42
Circumference:..................83.93......82.63.. ......... -1.3
Revs per mile:



Results......................275/35/19.....285/35/19
Totals are in inches...........Tire 1......Tire 2........ Difference
Sidewall Height:................ 3.79......3.93........... 0.14
Section Width:..................10.83......11.22.......... . 0.39
Overall Diameter:...............26.58......26.85.......... . 0.27
Circumference:..................83.93......82.63.. ......... 0.87
Revs per mile:



COMPARISON OF STAGGERED SIZES

Results......................265/35/19.....285/35/19
Totals are in inches...........Tire 1......Tire 2........ Difference
Sidewall Height:................ 3.65.......3.93.......... 0.28
Section Width:..................10.43......11.22.......... 0.79
Overall Diameter:...............26.58......26.85.......... . 0.27
Circumference:..................83.93......82.63.. ......... 0.87
Revs per mile:




Results......................245/40/19.....275/35/19
Totals are in inches...........Tire 1......Tire 2........ Difference
Sidewall Height:................ 3.86.......3.79.......... -0.07
Section Width:...................9.65......10.83.......... 1.18
Overall Diameter:...............26.72......26.58.......... -0.14
Circumference:..................83.93......83.5 .......... -0.43
Revs per mile:
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