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Location:
Castle Hill
Registered:
August 2003
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will a 14" 60 profile tyre and a 15" 60 profile tyre have same rolling diameter?
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Sun, 18 September 2005 13:14
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Ok I am searching for tyres at the moment, and I just want to find some things out, can anyone help me out?
I have 60 profile tyres on my 15" rim now, and I am about to get 60 profile tyres on my new 14" wheels.
Will the rolling diameter of both tyres be the same having a 60 profile?
Thanks for any info.
Cheers.
-Whitchy-
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Location:
Brisbane
Registered:
May 2002
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Re: will a 14" 60 profile tyre and a 15" 60 profile tyre have same rolling diameter?
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Sun, 18 September 2005 13:42
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Get your calculator out!
Rolling diameter = rim diameter + ( W * ( P / 100 ) * 2 )
Where W is the width in mm (eg 185) and P is the profile (eg 60).
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Location:
Castle Hill
Registered:
August 2003
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Re: will a 14" 60 profile tyre and a 15" 60 profile tyre have same rolling diameter?
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Sun, 18 September 2005 14:32
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Thanks Norbie!
I couldn't figure anything out with the stupid calculator on the PC, so I just googled "Rolling Daimeter Calculator"
and it gave me my answers!
But it has left me with another one...
How can the width of a tyre effect the rolling diameter?
Cheers.
-Whitchy-
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: will a 14" 60 profile tyre and a 15" 60 profile tyre have same rolling diameter?
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Sun, 18 September 2005 14:34
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cos thats how profile is defind?
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Location:
Castle Hill
Registered:
August 2003
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Location:
Brisbane
Registered:
May 2002
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Re: will a 14" 60 profile tyre and a 15" 60 profile tyre have same rolling diameter?
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Sun, 18 September 2005 14:47
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The 'profile'..i.e. the 60, means the sidewall is 60% of the width.
so if it was 200mm wide, the sidewall would be 120mm for a 60 profile tyre. 
Cheers
Wilbo
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Location:
Castle Hill
Registered:
August 2003
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Re: will a 14" 60 profile tyre and a 15" 60 profile tyre have same rolling diameter?
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Sun, 18 September 2005 14:56
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ohhhh I see! now it all makes a bit more sense!
Thanks heaps for all that info!
-Whitchy-
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Location:
tallahassee FL usOFa
Registered:
May 2002
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Re: will a 14" 60 profile tyre and a 15" 60 profile tyre have same rolling diameter?
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Sun, 18 September 2005 20:31
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| Quote: |
I have 60 profile tyres on my 15" rim now, and I am about to get 60 profile tyres on my new 14" wheels. Will the rolling diameter of both tyres be the same having a 60 profile?
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of course not! one is based is 15in and the other is 14in.
there is no way to calculate the diameter(what the F is "rolling diameter?) of any tire from any manufacture & any of their models.
the only size that you can depend on without actual measurement, is the rim diameter - all else is open to interpretation.
you must get the specs from them, and i think that revolutions per mile will help you more then the diameter, unless this is just for wheel arch looks, and then these crude estimates are good enough for that.
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Location:
Inner west,Sydney
Registered:
October 2004
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Re: will a 14" 60 profile tyre and a 15" 60 profile tyre have same rolling diameter?
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Sun, 18 September 2005 22:08
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www.miata.net/garage/tirecalc.html you can compare any size,
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Location:
sydney,nsw.oz.
Registered:
July 2002
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Re: will a 14" 60 profile tyre and a 15" 60 profile tyre have same rolling diameter?
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Mon, 19 September 2005 00:08
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| splatt wrote on Mon, 19 September 2005 08:08 |
www.miata.net/garage/tirecalc.html you can compare any size,
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Yep, that is the place
http://www.miata.net/garage/tirecalc.html
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Location:
Canberra
Registered:
May 2002
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Re: will a 14" 60 profile tyre and a 15" 60 profile tyre have same rolling diameter?
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Mon, 19 September 2005 04:24
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All you ever wanted to know is right here:
http://www.carbibles.com/tyre-bible.html
Scroll down, and find the tyre size calculator.
cheers Chuck
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