Luke

I've got 205/60/15 tyres on legacy turbo.
If I change them to 205/55/15 (WRX) what will happen . Will the handling change etc..??

Charlie H

Your rolling diameter will be smaller, causing your speedo read incorrectly. If you go down in profile ie /60 to /55 you should increase overall diameter ie 15" to 16" Try the following web site to find out what you can fit without screwing up the speedo.

BOB.T

I'd say you'd be ok if you went to a fifty series but that site is probably worth a look

Bob

Luke

Cheers , Could not get much help from site.
Its only 1/2 inch will I notice. I plan on telling insurance anyway.

Gastro

This is just a theory........surely with a smaller rollign diameter --> you run the risk of putting more strain on the 4WD/transmission dont you ??? (ie more revolutions per minute)
I'd check on this - 1/2inch may not sound alot.....but over 20000 miles it could mean alot more............

Gastro

ptholt

Well according to my wife it would make her day !

sorry couldnt resist dragging it into the gutter, its a northerners thing.

jon hill

On this subject - what advantage do bfo wheels give over smaller diameters ?

apart from styling of course

lets say i'm on 16" rims, and I change to 19", am i going to see some improvement somewhere because of diameter ? or are improvements only due to increased width (more rubber on the road) and to lower sidewalls (and therefore stiffer sidewalls). I think that the racing caterhams use 13" wheels, while their road going counterparts are more likley to have 14" - 15".

Never really understood this....

jon

Jolly Green Monster

iTrader: (4)

Well I believe with the profile being the actual % of the width you are actually only talking 5% of 205mm which is 10.25mm.... so your car will be 10.25mm lower...less than 1/2 inch but there will probably be less flex in the sidewall and the car will probably sit at about the same height.
The arches might look a bit empty and make the car look higher.
Handling should be slightly improved.

DazW

iTrader: (1)

Check out this site aswell!!!

HunterB

Luke,

The change you propose will make very little difference to the rolling circumference - just over 1% - so the speedo difference is negligible. Reducing the aspect ratio from 60% to 55% may provide a slightly stiffer sidewall (depending on the tyre make) which should provide for slightly better cornering ability at the expense of ride comfort. With such a small change in tyre, I doubt whether you'd notice the difference.

Brian

Steve Williams

Sorry, read the title and ......heh heh.

I will go back to the muppet forum now.....