Re: big wheels, whats the answer?
Too low in what respect? How would it affect the car? Im dropping it 35-40mm next month, so I got the low profile to prevent problems with rubbing etc.
The profile number represents percentage of tyre width. If you have tyre 215/40/R17 the tire sidewall has height 40 percent of 215mm. If you have 215/45, the sidewall is 45 percent of 215 mm. The rim size doesn’t change so by changing tyre profile you change the diameter of the wheel.
The car is setup for certain tyre diameter with some small tolerance. That is why when you change rim size, or tyre width you have to compensate this by picking up a tyre with proper profile.
Alfa 147 has recommended sizes:
You can use different size, but in this case calculate the wheel diameter; it has to be close to these sizes. You can use 215/40/17 but note that the tyre will have smaller diameter, this means acceleration will be quicker, top speed lower, you speedo will show less than real speed and as the sidewall is lower the ride is more harsh as well.
I have 35mm lowering and 215/45/17. No problems with rubbing.
147GTA,Grigio Metallico,Imola leather, 3.75l conversion,F360 TB,ported heads,Balduzzi cams,GTV manifolds,EQ pipes,Supersprint silenced cat back,18" GT multispokes,KW V3,Galfer 6pot 355mm,Brembo sport rear, Blaupunk NewYork 800 + Focal
147 1.6TS, Nerro,Beige Interior,Galfer Extreme Brake kit,2,0TS intake manifold,Custom ex. manifold,200CPI cat,Supersprint silenced center + OO backbox,GTA spoiler,GTA side skirts,GTA headlights,Blaupunkt LA MP74 + Focal + MacAudio + Dynamat + HERZ subwoofer
Last edited by gotcha; 29-06-07 at 09:42.