Tyre Size Option

[TinTin]

Hi,
I have B6 17inch alloys on my B5 (like these ones 2003 03 AUDI A4 B6 1.8 - 17 INCH 5 SPOKE GROOVED ALUMINUM ALLOY WHEEL / RIM 4F0601025AF Recycled / Used Audi Parts Online!)

Currently fitted with 235/45 r17 tyres but i've been offered some 225/45 r17 tyres. Would they fit/be safe? I know the change in rolling diameter would change the speedo reading slightly which isnt a great issue, just wondering if they are even an option.

TIA.

 

[jcb]

225 is fine on 7.5" wide rim

slightly lower profile (45% of 225 vs 45% of 235) but nothing you will notice!

 

[Bradderz_1988]

225 shouldnt affect the speedo its the 45 profile that will affect it if you swapped to a higher/lower profile on the same size wheel, if you swapped from a 45/17 to a 45/18 you would affect the rolling radius which is why you would fit a 40/18 or 35/18 tyre to compensate the rolling radius !!

i run 225/45/17 on 8" wide rims !

 

[crazy88]

But the "45" is a percentage of the width. So if your tyres are 225 the profile will be slightly less than 235 width tyres.

I think 225/45/17 is actually the standard tyre size on the b5 though isn't it? I'm sure I remember having this argument with scottb5 (a nice argument) because my b6 uses 235 as standard, but he said it was 225.

 

[TinTin]

Thanks guys.
Tyres on the way...just need to get them fitted early next week.

 

[aragorn]

225 45 17 is the correct tyre for a B5, and will fit fine on a 7.5" rim.

 

[Chriscooke]

As above. I run a 225/40/18 on a 9.5j and even though that is a little stretched its still as safe. Fulken even state that in their fitting guidelines