Best Tire Size
#1
Just cruising
Thread Starter
Join Date: Oct 2004
Location: Weirton, WV
Posts: 602
Likes: 0
Received 0 Likes
on
0 Posts
Best Tire Size
Hi Guys, My Dad bought me a set of Motegi Racing Wheels for my 90 T2. I'm pretty sure I asked for 17" but he bought me 18" wheels. They are 18x8 +35. I was looking through other posts trying to figure out which size tire would be best to put on them but didn't have much success.
So, which size tire would look/work the best?
So, which size tire would look/work the best?
#2
Just cruising
Thread Starter
Join Date: Oct 2004
Location: Weirton, WV
Posts: 602
Likes: 0
Received 0 Likes
on
0 Posts
After more digging I found that it would have been easier if the rims were 17s.
Anyway, the sizes I found pics of were all mounted on FDs.
215/40, 225/40, 245/40, and 255/35
Doesn't anybody use 18 inch wheels on FCs?
Anyway, the sizes I found pics of were all mounted on FDs.
215/40, 225/40, 245/40, and 255/35
Doesn't anybody use 18 inch wheels on FCs?
#5
Bridge Burner.
iTrader: (13)
well with any tire/wheel modifications, you'll want to get as close as you can to the stock tire circumference as possible. (rule of thumb is to go no bigger than 3% up or down)
a 245/40-18 would be more than 4% taller, and would result in false readings from the speedo, and worse yet it would RAISE the car about ~0.7 of an inch (which looks terrible, is bad for handling, and just over all not a good choice)
a better match would be either a 215/40-18 which is less than 1% taller than stock. or a 235/35-18 which is also less than 1% taller than stock.
depends of what you'd like. with a 235/35 all around you'd probably have to roll the front fenders.
a 215/40 is a safer choice, but you'd get less contact patch.
a 245/40-18 would be more than 4% taller, and would result in false readings from the speedo, and worse yet it would RAISE the car about ~0.7 of an inch (which looks terrible, is bad for handling, and just over all not a good choice)
a better match would be either a 215/40-18 which is less than 1% taller than stock. or a 235/35-18 which is also less than 1% taller than stock.
depends of what you'd like. with a 235/35 all around you'd probably have to roll the front fenders.
a 215/40 is a safer choice, but you'd get less contact patch.
#6
1990 T2
iTrader: (2)
Join Date: Aug 2006
Location: Weirton WV
Posts: 437
Likes: 0
Received 0 Likes
on
0 Posts
Wow, thanks for the info. Maybe my best bet would to return the wheels and trade them in for 16s or 17s. The 18" tires are rather costly also, although cost really isn't a problem, but why spend so much money if I don't have to.
#7
Rotary Freak
iTrader: (4)
well with any tire/wheel modifications, you'll want to get as close as you can to the stock tire circumference as possible. (rule of thumb is to go no bigger than 3% up or down)
a 245/40-18 would be more than 4% taller, and would result in false readings from the speedo, and worse yet it would RAISE the car about ~0.7 of an inch (which looks terrible, is bad for handling, and just over all not a good choice)
a better match would be either a 215/40-18 which is less than 1% taller than stock. or a 235/35-18 which is also less than 1% taller than stock.
depends of what you'd like. with a 235/35 all around you'd probably have to roll the front fenders.
a 215/40 is a safer choice, but you'd get less contact patch.
a 245/40-18 would be more than 4% taller, and would result in false readings from the speedo, and worse yet it would RAISE the car about ~0.7 of an inch (which looks terrible, is bad for handling, and just over all not a good choice)
a better match would be either a 215/40-18 which is less than 1% taller than stock. or a 235/35-18 which is also less than 1% taller than stock.
depends of what you'd like. with a 235/35 all around you'd probably have to roll the front fenders.
a 215/40 is a safer choice, but you'd get less contact patch.
Trending Topics
#9
Just cruising
Thread Starter
Join Date: Oct 2004
Location: Weirton, WV
Posts: 602
Likes: 0
Received 0 Likes
on
0 Posts
I was using the tire size calculator and if I put 215/40-18 on the wheels, the tire should be physically about the same size as stock and the speedometer should read 60.2 when doing 60.
215/35 would be a little smaller and the speedometer would show 58.2 when going 60.
Which is better? A little smaller or a little bigger.
#11
Trunk Ornament
iTrader: (11)
Not everyone needs to race their cars to get between work and home. Some people prefer the smoother ride of a larger tire, and that's still perfectly acceptable. I like the way the stock wheels/tires ride. It's nice and smooth, and the car handles well enough that I don't need to sacrifice ride comfort for that 0.001% chance I need or want the car to handle like we're flying down a mountain at 180.
My vote is for the 215/40's too. I used to hate having to mount anything with an aspect ratio less than 40.
#13
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,855
Received 2,617 Likes
on
1,854 Posts
sell and buy something that fits!
#15
Just cruising
Thread Starter
Join Date: Oct 2004
Location: Weirton, WV
Posts: 602
Likes: 0
Received 0 Likes
on
0 Posts
thanks for all the help guys. I'm going to look around and put a price on the tires.
I can't take them back..........they were a gift
thanks again
ashley
I can't take them back..........they were a gift
thanks again
ashley
#16
Trunk Ornament
iTrader: (11)
Search multiple tire sizes. More common sizes are usually cheaper. For instance, 225/40/18 are about $50 cheaper than 215/40/18. Fiddle with the numbers and see what you can come up with. It's not like the Rx7's speedometer is very accurate anyways. With stock tires and differential, I was 6 mph off around 15 mph (reading 21) and it got better around 60. I was then reading a couple mph off again around 70 (going 72).
#17
Bridge Burner.
iTrader: (13)
Search multiple tire sizes. More common sizes are usually cheaper. For instance, 225/40/18 are about $50 cheaper than 215/40/18. Fiddle with the numbers and see what you can come up with. It's not like the Rx7's speedometer is very accurate anyways. With stock tires and differential, I was 6 mph off around 15 mph (reading 21) and it got better around 60. I was then reading a couple mph off again around 70 (going 72).
#18
Just cruising
Thread Starter
Join Date: Oct 2004
Location: Weirton, WV
Posts: 602
Likes: 0
Received 0 Likes
on
0 Posts
Search multiple tire sizes. More common sizes are usually cheaper. For instance, 225/40/18 are about $50 cheaper than 215/40/18. Fiddle with the numbers and see what you can come up with. It's not like the Rx7's speedometer is very accurate anyways. With stock tires and differential, I was 6 mph off around 15 mph (reading 21) and it got better around 60. I was then reading a couple mph off again around 70 (going 72).
Big difference. I'll probably go with the 225/40.
Thread
Thread Starter
Forum
Replies
Last Post
Jeff20B
1st Generation Specific (1979-1985)
73
09-16-18 07:16 PM
[For Sale] Scratch & Dent, Used, and Open-Box Sale!
SakeBomb Garage
Vendor Classifieds
5
08-09-18 05:54 PM
rx7jocke
Suspension/Wheels/Tires/Brakes
72
06-17-16 03:48 AM
rx8volks
Canadian Forum
0
09-01-15 11:02 PM