Wheel Size Effecting Speed Reading

[Igors92]

Just wondering if by changing the stock wheel and tires 17X8 245/45ZR17 to 18X9 265/35/ZR18 my odometer speed will be affected and by how much?

 

[MT1083]

use this to figure it out...
http://www.miata.net/garage/tirecalc.html

 

[wms004]

Just wondering if by changing the stock wheel and tires 17X8 245/45ZR17 to 18X9 265/35/ZR18 my odometer speed will be affected and by how much?

265/35 is a good size for the front, but 275/35 is the size that won't affect your speedo.. thats the combo i have

wade

 

[nickthegenius]

265/35 would be a good size for you. They shouldn't rub in the front and your speedo will only read 1.5% too fast. I'd rather have it read a bit fast than slow.

 

[SRMobile]

Yeah, I had the same mentality too in my last car... Then I had to get some warranty work done, but I was out of warranty!!! But in actuality I wasent.

 

[4.6_02_Black_GT]

..17 inch 45 series to +1 sizing to 18 inch 35 series speedo difference is negialble...

but if you want to fix it...get a Speed Cal from Dallas Mustang..I love mine