I'm a n00b when it comes to tires and wheels, so some help would be appreciated! I have a 2010 TSX, stock, grigio metallic...

I'm wanting to pick up a set of RonJon Legend 7s in liquid graphite since I just got the car paid off, so that means I have the choice between 18" and 19". I'm not planning to do any suspension changes from stock since it's my daily driver (at least for the foreseeable future). I'm leaning more toward 19s, but didn't know if there were any concerns about clearance or what the best tire size would be for my setup.

Suggestions would be greatly appreciated!

I'm new to this too, and there have been MANY posts on this, including many giving tire calculator links, but you've got my car, and I just bought RonJons... so I'll be nice and not just tell you to use the search engine... but next time, use the search engine.

http://www.miata.net/garage/tirecalc.html
Go to the lower portion of this page and put in your tire size 225/50-17, and then the options you want to consider. You will get a table showing how well the tire you want to install on 18 or 19" rims will match the OEM diameter.

I went back and forth on 18 or 19, there are a ton of pics on RonJon website with both 18s and 19s, and most pics show their tire sizes, so start there. In end, went w/ 19s as they cost me the same over the holiday. Considered the Liquid Graphite, very subtle choice w/ the Grigio... but went for the older style Raven Black w/ Machined Metal. Don't know if he has full set of 19s in this? There is guy on eBay selling 19" RonJons for $700 + 100 shipping, and while he claims "Warranty - 2 Year Finish Warranty - Lifetime Defect Warranty" in his posting, you read around, you'll find some who had issues with product that arrived, and he would not respond... whether they're 2nd or overstock, I don't know... but I went w/ factory during Christmas sale and am happy... no pics yet, as I' waiting for spring to put on w/ summer tires...

Thanks for the info bjwsan, it was of help, especially the calculator link you posted.

You're welcome. Glad to help. Post pics after you install the wheels!

As far as specs, with no drop you can get away with +32mm offset (aggressive wide stance) to 48mm offset (conservative stance closer to OEM stance). With a drop, you are limited to 38mm offset in the front.

19" with 225/40/19 would be great regardless of suspension. Here's a preview on a stock ride height TSX:



and lowered:




and 18" Rev wheels (my favorite 18" design):

i just brought a 2010 tl tech awd and wanted to put rims 19 or 20 ,but dont wanna loose the ride or hitting bumps all hard...any recomadations?

should probably be posting on the TL side lol