Newbie Question
 

Simple question .... well, except for me. From what I've read here, a 225/17 tire will fit a 17x7 Base Limited wheel.

Is there a downside to upgrading from the 215/45 to the 225/40? Want to go to a slightly wider tire without also going to the 7.5 rim.

TY
John

https://www.ft86motorsports.com/wheelitfit/


-2.12% smaller number on the speedo thanks the different size.



Get a 17x8 and go 245/40 for an almost identical to stock ratio :burnrubber:

TY! Having owned BMWs, I can live with the small speedo differential.

Why wouldn't you go 225/45 instead? Just 1.4% over.

Ugh! Because I'm a silly newb ... I meant to ask about 225/45/17, not 40.

What are you looking for though?
Is it a daily driver, or do you AutoX/track too?

225 will be more pinched / less stretched than stock, possibly having minor impact on steering due to less preload on the sidewall.
Besides obvious things like minimal impact on the speedo readings, it might also minimally reduce how much space there is left when you hit major bumps. The latter might matter if you're lowered a lot and/or have some special coilover setup.

Thanks for all of your input.

I bought my BRZ only two days ago, and would like to ditch the Primacy's for either Michelin A/S 3+ or PS4S . Primarily a DD, but also intend to do some AutoX and occasional light track. Retaining the stock suspension for now.

Perhaps I should just cool off and burn the Primacy's off first, huh? Hopefully the base suspension is setup to understeer with them. I hate surprises.

Congrats on your purchase!
IMO, keep the stock tires until you can consistently push them to the limit at AutoX.

To reduce understeer, get "SPC Performance 81305 Camber Bolt" for the front and max them out for negative camber (easy to DIY).
Then go to a decent alignment shop and ask them for zero or slightly negative toe front, 0.05º—0.10º toe in rear on each side.

Hi. Hope you're loving your new car! From my experience I would leave on the cheap tyres for a DD. I found as I got more confident I started to enjoy a bit of tail out action and my tyres didn't last like they should, I went and bought a cheap set of stock rims secondhand and got a dedicated set of track tyres.

If you do push a bit harder on back roads, less grippy tyres might make you a better driver in the long run.

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Thanks for the advice.

225/45-17 is a bit "pooched" on 7" wide wheels. I'd go 215. Save for 7.5" or 8" wheels to run 225s, 8.5" or 9" to run 245/40.

First, ignore the people that say the stock tires are crap, they are wrong. Drive the car as is and see what you think. You don't need super expensive tires to enjoy this car.

Well, I think that the smartest thing I've done so far is posting my question here.

Getting some varies opinions, and I'm soaking every one us like a sponge .... well, to the best of my ability anyway. :lol:

I'm going to stick with the OEM 7" rims & 215's until I become familiar with how she handles. I'll start exploring later.

That'll also allow me some time to read-up on caster, camber, and toe-in and -out. Even though I've been a lifetime gearhead (yeah, going back to the 60's!!! ... I'm an old fart), I know very little on car handling dynamics. Never too old to learn.

Thanks again to everyone who contributed.

JohnM