Tire Size Calculator

[Marek]

practical

[static]

Thats really gr8 to know , so if i change the rims and tires to different sizes my whole speedometer reading will be wrong ?? Never knew that

[Marek]

Originally Posted by static

Thats really gr8 to know , so if i change the rims and tires to different sizes my whole speedometer reading will be wrong ?? Never knew that

of course, your MPG will change also, your acceleration, and top speed changes, you can see also a serious difference when tires are all pumped and have the same pressure, than different all around, and bad inflation...

[static]

i know about the MPG , acceleration, speed changes , my point was if i change the rims , im cruisen in a street that has a 100 km/h speed limit , my spedometer is on 100km/h , but acually my speed is 115km/h , i could have a ticket without knowing i was over the limit :eek3: .
Nice post

[vette12]

thats really cool, thanks

[v_dub_ya]

Originally Posted by static

Thats really gr8 to know , so if i change the rims and tires to different sizes my whole speedometer reading will be wrong ?? Never knew that

if you change your rims and tires, you want to try and get the outside diameter to be the same as your original outside diameter

with a larger rim ( from a 15 to a 16 ) and a lower profile tire ( from a 60 series to a 50 series ) you can get pretty close to the original oustide diameter, these are just examples of sizes, the above tire calculator is pretty dam cool

[97talon]

That's the site I used to figure out what size winter tires to get. Went from a 205/50/17 to a 195/65/15. There's a tenth of an inch diff. in the outside diameter which is pretty damn close.