Different Profile Tyres? (front & rear)
#1
Different Profile Tyres? (front & rear)
Just a quick question - Why are the rear tyres lower profile than the front?
Just by looking at them, the rear alloy looks bigger and nicer because of the lower profile tyres compare to the front.
is it ok to have a low profile tyre for the front wheel? will it make any difference?
I have the standard 17" alloys with standard RE050A tyres.
Just by looking at them, the rear alloy looks bigger and nicer because of the lower profile tyres compare to the front.
is it ok to have a low profile tyre for the front wheel? will it make any difference?
I have the standard 17" alloys with standard RE050A tyres.
#2
Registered User
They aren't a lower profile.
215/45/17 Front
245/40/17 Rear
Millimetres/percentage of width/inches (That has to be the most messed up set of measurements going!)
The mistake you are making is thinking that the profile number is mm
215/45/17 Front
245/40/17 Rear
Millimetres/percentage of width/inches (That has to be the most messed up set of measurements going!)
The mistake you are making is thinking that the profile number is mm
#3
Width of Tyre/Profile/Inches
Therefore the profile of the rear wheel is less than the front making the alloy look bigger. I am just wondering if it is ok to have the front tyre the same profile as the rear (both 40).
Cheers
#4
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If you had the same profile front and rear but had different widths your rolling radius would be different. As mentioned the profile is a percentage of the width. so as you have a wider rear tyre you need a smaller profile number to keep the rolling radius equal to the front.
It's a common misconcetion that the profile number is the actual 'thickness' of the tyre in mm etc. but it's actually, as Ultra_Nexus mentioned the % of the width.
You should have 215/45/17 at the front and 245/40/17 at the rear
It's a common misconcetion that the profile number is the actual 'thickness' of the tyre in mm etc. but it's actually, as Ultra_Nexus mentioned the % of the width.
You should have 215/45/17 at the front and 245/40/17 at the rear
#5
Slightly off topic sorry, but has anyone tried 225's front and 255's rear to help protect the wheel rim from kerbing.
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As others have said it's % so the actual dimensions are 96.5 front and 98mm rear, if you changed both to 40 profile it would make the front tyre smaller( 86mm) with a bigger wheel arch gap
So changing to same profile makes it look worse, probably effect handling and maybe give abs problems as front and back wheels will be rotating at different rpm
If you must have same profile I think you can run rear alloys and tyres on all 4 corners (I'm sure someone on here did it) it's probably not ideal for general road use more for track
So changing to same profile makes it look worse, probably effect handling and maybe give abs problems as front and back wheels will be rotating at different rpm
If you must have same profile I think you can run rear alloys and tyres on all 4 corners (I'm sure someone on here did it) it's probably not ideal for general road use more for track
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#8
Good reply.
I sometimes wonder if people know what the tyres are actually for!
I gan just about keep a straight enough face to mention Goodyear F1As have a thicker sidewall moulding for rim protection. But learning the extremities of your car is the better way.
I sometimes wonder if people know what the tyres are actually for!
I gan just about keep a straight enough face to mention Goodyear F1As have a thicker sidewall moulding for rim protection. But learning the extremities of your car is the better way.
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