Low profile tires, Stock rims.
#26
Registered User
Join Date: Oct 2007
Location: On the edge of Nowhere
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
The difference between 225/40 and 225/45 is 3.43%. This means your speedometer and odometer will read 3.43% too high, and you shorten your final gearing by 3.43% also. IMO the aesthetic difference between 225/40 and 225/45 isn't big enough for most to even notice, but by doing this you are effectively racking up and extra 3 and a half percent more miles on your car roughly.
I am no proffesional racer, but I can't imagine that shortening your final drive by that amount will make a huge differnce, and certainly the performance benefits on the street are marginal at best. Not to mention that you are much more likely to damage your wheels.
At 50,000 actual miles your odometer would read 51,715 miles.
Wouldn't be my choice.
I am no proffesional racer, but I can't imagine that shortening your final drive by that amount will make a huge differnce, and certainly the performance benefits on the street are marginal at best. Not to mention that you are much more likely to damage your wheels.
At 50,000 actual miles your odometer would read 51,715 miles.
Wouldn't be my choice.
#27
The devil made me do it
iTrader: (1)
Join Date: Jul 2007
Location: Colorado Springs, CO
Posts: 3,708
Likes: 0
Received 2 Likes
on
2 Posts
Maybe Im wrong...but the dimension of your wheel didn't change so your speedo should be right on. And am I wrong in thinking that changing the "profile" of the tire is to adjust the thickness between tread and rim, not inner and outer wall?
#28
Registered User
Join Date: Oct 2007
Location: On the edge of Nowhere
Posts: 21
Likes: 0
Received 0 Likes
on
0 Posts
The profile is the ratio of your sidewall height to your tread width, so a reduction in profile without a corresponding change in your tire width means the outside diameter of your tire is shorter. This in turn means that the shorter tire has to make more rpm to cover the same distance, but the speedometer and odometer are actually measuring how many times your wheels go around, so it is assuming stock tire diameter. So then you are reading a higher speed and racking up miles faster than your actual speed and miles travelled.
#29
auto suckkssssss
Join Date: Oct 2007
Location: Sandy, Utah
Posts: 397
Likes: 0
Received 0 Likes
on
0 Posts
the only real difference your going to get is the look and ride quality difference. It will be more rough. The speedo may be like 1/2 of a mph off and you wont see a difference in your gearing. In theory it makes them smaller but you wont be able to feel it. I would just stay with stock, you wont get any gains out of it other then crappy ride.
#30
Thread
Thread Starter
Forum
Replies
Last Post
akagc
RX-8's For Sale/Wanted
7
08-11-2015 07:07 PM
cschoeps
RX-8's For Sale/Wanted
0
08-06-2015 12:44 PM