Wheel Sizes? - Alfa Romeo Forum
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alfa 156 2.o ts

Wheel Sizes?

I have a 1998 156 and i am wishing to put 17" or 18" wheels on her.

Anybody have any recommendations for the offset and width of tyre for the perfect fit.

ET35 or ET45 - 205/45/17 - 215/45/17
ET35 or ET45 - 215/40/18 - 225/40/18

Any Help.
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wheel width needs to suit the tyre width. and the wheel width dictates the offset. other determinants of offset are looks and 'track width' which affects stability/handling.

for the 156, i'd recommend:
*215/45 tyres on 17" wheels, 7~7.5" wide, with offset +32 to +38mm (ET32-38)
*225/40 tyres on 18" wheels, 7.5~8.0" wide, with offset +32 to +38mm

there is less tolerance (room to move) with the 8" wide wheel. so stick within that offset when choosing (different style wheels usually only offer one choice within a range like that). with a narrower 7" wheel, the range is technically much broader, and it will still fit (ie: could probably be between +28 to +50mm). but for reasons above, stick wtihin that range if possible.

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For 18": 225/40R18
for 17": 215/45R17 or 225/45R17

ET35 for both.
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