I've composed a chart for us Bonneville owners wishing to change tire and/or rim sizes, that shows the best/closest overall tire size to keep the speedo as close as possible with vehicle speed. I've listed a couple series sizes for some tires that have the same width, just so you can see the difference in speedo change due to series perentage. In bold are the closest ones to the stock overall tire height that give the closest 60mph speedo to actual-speed relationship. Obviously, keep rim width in mind when choosing your tires. Also, it'* pretty evident that anyone running a 20" rim is most likely not going to run a tire that'* only 225mm, I just stuck those figures in there for reference. One thing I've noticed is there are a lot of tire sizes out there that are super hard to find at tire stores, so going with the next closest size might be what'* best. All calclations courtesy of the Tire Calculator @ http://www.miata.net/garage/tirecalc.html. i know the link has been posted many times before. I just wanted to throw it back up if anyone needed it, and also display a chart unique to our tire stock tire size for a quick reference. ENJOY!

nice, somthin i was always wondering with 245/45/18s

Not bad, but Tirerack does the samething, and you forgot the 215 sizes that are common on stock SE'* with 15"

I'm sure I could add them to the list if people wanted. I know tirereack does this but I thought it would be hady to see them all on the same sheet so you could compare.

good size comparo, but lots of those sizes dont even exist, and I wouldnt ever try putting much wider than a 245 (255 in 2000+ Bonnes) on a Bonneville a 265 would rub like crazy.

It'* just for reference anyways. But wouldn't you think if someone went with a 20 inch rim, which is most likely wider than 8 inches, would have to run something as wide as a 255 or 265? If you had the correct offset on the new rim you could run something that wide. But again the list is just for reference in comparison to our stock tire size. I probably went a little overboard with it...

The real question is, what'* the widest tire I can put on my stock rims???

the correct tire size for a 20 inch rim on a 92-99 Bonne would be a 245/35/20 (by the way rims are normally 20x8.5 in fwd offsets) for a 2000+ you can use either the 245/35/20 or the 255/35/20


Depends on your stock rim size....the absolute widest that can go on torquestars (or any 16x7 Bonne rim) is 245/50/16 however doing this will likely cause abnormal outer shoulder wear especially on the fronts and even more so if you drive aggressivley. The factory tire size (225/60/16 for 92-99s...unless you have the 15" rims) in a high performance rated tire (V or higher) is the best bet for the best handling and longest wear. You can also do a 235/55/16 which is just a hair wider but your choices of tires available drop signifigantly, and you do not gain much in the long run.

Wow. Thanks for the info... Very nicely worded. Even I understood that, and I'm rated somewhere around a drunken monkey for intelligence....

Seriously. Thanks!

I manage a Sears Auto Center, so not only are tires my business, but dealing with drunk monkeys is as well LOL