[40thmustanggt]

ive been reading that if you go with a taller tire it will add more to your gears i have 4.10s and i love them but i wouldnt mind getting my rpms alittle lower. so tire height would be the 245- number right? and 45 is width right? or is it the other way around? so what size would i need to get more gear back?

[lilmarc1988]

245 is the width, and 45 is the sidewall of the tire(correct me if im wrong)

[GTsetGO]

Originally Posted by lilmarc1988 245 is the width, and 45 is the sidewall of the tire(correct me if im wrong)

you are correct.

245 is the width and the 45 is the sidewall in percentage of the width.

[40thmustanggt]

Originally Posted by GTsetGO you are correct. 245 is the width and the 45 is the sidewall in percentage of the width.

alright so ive always been told wrong. so how much gear did i lose from swaping 45's to 35's?

[lilmarc1988]

lol that i dont know

[doesntplaywell]

Tire Sizing Formula
size - width in inches
185 - 7.2"
195 - 7.6"
205 - 8.0"
215 - 8.4"
225 - 8.8" width X aspect ratio X two + wheel diameter = height
235 - 9.2"
245 - 9.6"
255 - 10.0"
265 - 10.4"
275 - 10.8"
285 - 11.2"
295 - 11.6"
305 - 12.00"
315 - 12.40"
325 - 12.80"
345 - 13.58"
355 - 13.98
365 - 14.37"

here's a tire size chart that can give you dimensions for most all tires in inches

for instance a 275-40-17 find 275 which is 10.8" wide... multiply that times the aspect ratio which in this case is .40 (always put a point in front) which gives you a sidewall size of 4.32" multiply that times 2 (sidewall top & bottom) which gives you a total sidewall size of 8.64 then add the rim diameter which is 17" for a total height of 25.64" so a 275-40-17 would be 10.8 inches wide & 25.64 inches tall ( some brands of tires vary a bit but this formula is very close)

[matfernan1]

can i get a 305/35 18 on a 18/10 it says suggested size is 285 35

[doesntplaywell]

here's a link given to me by dude496 ... PaladinMicro
it will also help with tire sizes compared to rpm's & speed for mustang 5 speed trans
also on the nitto tire site is shows approved rim widths for a 305-35-18 to be 10.0 to 12.0 with suggested rim width to be 11.0 so I'd say a 10" rim would be fine

[matfernan1]

thanks i thought it would be but i wasnt sure

[40thmustanggt]

Originally Posted by doesntplaywell here's a link given to me by dude496 ... PaladinMicro it will also help with tire sizes compared to rpm's & speed for mustang 5 speed trans also on the nitto tire site is shows approved rim widths for a 305-35-18 to be 10.0 to 12.0 with suggested rim width to be 11.0 so I'd say a 10" rim would be fine

thanks

[RavensChild]

i run 245/45/zr18........i would like to run 275 or so/45/zr18 next time around or something like that. I cant wait to replace my rims so that i can get some good looking ones and 17". Tires are about $75 cheaper a tire.