Originally Posted by moock
hi all. great thread!
i'm running 15x7 Kazera KZ-M rims on my 1988 325e. i'd like to put either 205/50/r15 or 225/50/r15 on it. i'll be using the tires mostly on the street, and once a month at autoX driving school, which i'm starting this year.
tires i'm considering:
Falken Azenis RT-615
Michelin Pilot Exalto PE2
1) what are the pros and cons of going with a wider tire (the 225)?
2) is it true that the 225 will handle better than the 205?
3) is it true that 225/50/r15 will definitely fit a 15x7 rim without rubbing (no fender rolling required)?
First off, neither of the mentioned tires come in 225/50/15, so I guess that solves that problem.
Pros of a 225:
Shorter stopping distance
Increased lateral grip
Cons of a 225:
Decreased steering response
Decreased hydroplaning resistance
The 225 will technically handle worse, depending on your meaning of handling. The 225 tire is on the outer edge of recommended width for a 7" wheel, so the steering response can get sloppy, along with transitional stability. That said, with a stiff enough tire (BFG G-Force Sport, Yoko ES100, Hankook R-S2, etc) these downsides are minimized.
225/50/15 can fit without rolling (I personally did that), but it depends on the following variables:
- Car year
- Tire model
- Wheel offset
Provide me with all of those details and I can tell you if it will require rolling. Honestly don't shy away from the job, it's very simple.