Tire and Rim size / speed calculator

[project92SC2]

Tire Size Calculator

This will help all who want bigger rims and/or tires for their car. Get your speed right, so you don't get a ticket!

For example, 17'' rims, nominal tire size is 205/50 R17. It will have you going 60.2mph when you're speedometer says 60mph.

[slowion2]

been using that site for years now, almost as long as I've been around saturns.

[project92SC2]

Well, now there's a link for everyone else to use as well if they didn't already know about it. I've been using it for the past 2 years, and just never thought to post it till now.

[djgeo05]

mines actyally like 1% off

when it reads 60 its really doing 59.3


not bad i thought it was going to be off by like 5 mph

[project92SC2]

Which ones

Tire Rack 1

Tire Rack 2

New Goodyears

[aeroblu22]

lol, my switch from 205/55 R16 to 205/50 R16 threw my speedometer off by 3.2%. 60mph is actually 58.1 mph.

[slowion2]

i"m in the same situation because I'm running the same wheel recal as yours to get the higher top speed

[saturnspeed_12]

i thought brian already put up the link in the how to section. and i use 1010tires calculator.

[Plastic Fury]

Yeah, I too have been using that Miata tire calculator for years as well. Jon turned me to a new one at a place called Big Custom wheels. They sell some gangsta ass rims and some monster brake kits for the hoopties BUT they have a great tire/wheel calculator for wheel offset and tire size. You can also compare two at one time to see the difference.

It is setup nicely, check it out.

Wheel/Tire calculator