Technical Alloy wheels

[zupzupzup]

Hi,

My mate kindly donated me his old fiat alloys, so we put them on yesterday. However i am wondering if this is okay because the old tyres were R14's and the new alloys are R15's.
Everything looks okay, but does increasing tyre size has any problems and secondly do I have to go to a garage to balance my wheels or look at the power steering as these alloys are heavier?

BTW car is a 2000 1.2 4 door punto


Thanks Will

 

[richie.guy]

If the wheels had tyres on they don't need balanced.

Going from 14" to 15" is fine provided the rolling radius isn't miles off, which it won't be as you'd have rubbing issues. If they're larger the speedo will under-read slightly.

PS doesn't need looked at.

 

[zupzupzup]

If my speedo is under reading, would this be by a significant amount to worry about? cheers

 

[richie.guy]

If my speedo is under reading, would this be by a significant amount to worry about? cheers

What was the old tyre size, what's the new tyre size?

 

[zupzupzup]

old ones: 165/70 R14
new: 185/55 R15

 

[Jonnio]

http://www.kouki.co.uk/utilities/visual-tyre-size-calculator

 

[zupzupzup]

thanks man

 

[smokeyjoe03]

I too have a 1.2 5 door punto with 14" steelies and now have 15" Active Sporting alloys off a mk2b, there is no issue at all going up just the extra inch. just seems a lot safer now at higher speeds. It used to wobble like a shopping trolly lol, seems pretty stuck to the road now though.

 

[rareun]

If my speedo is under reading, would this be by a significant amount to worry about? cheers

most cars over-read anyway (compare your sat nav reading to your speedo as say navs give your actual speed) chances are your speedo will actually be more accurate with an inch or so larger wheels.