tires measures
Thread Starter
Team Owner
Joined: Nov 2004
Posts: 20,720
Likes: 25
From: Sorrento Italy
tires measures
hi, i beg your pardon for my ignorancy on the following iussue:
there are some tires, mainly racing tires, that have another sistem of measuring (for example 25.50x15.50x15...etc etc) which i dont understand, could you tell me to what figures corrspond on the other sistem the sizes 275/50/15 and 275/60/15? thanks/Giu
there are some tires, mainly racing tires, that have another sistem of measuring (for example 25.50x15.50x15...etc etc) which i dont understand, could you tell me to what figures corrspond on the other sistem the sizes 275/50/15 and 275/60/15? thanks/Giu
Melting Slicks
Joined: Jul 2002
Posts: 3,000
Likes: 22
From: Boulder Creek California
To be a little more specific,
in 25.50x15.50x15
the 25.50 is the outside diameter of the tire
the 15.5 is the width of the tire (tread or total width, I don't know?)
the 15 is of course the wheel diameter.
wheras in 275/50/15
275 is the tread width
15 is again the wheel diameter
and 50 is the 'aspect ratio' of the sidewall. A 50-series 275 will have a proportionally taller sidewall that a 50-series 255.
The inch system is nice and straightforward but the latter system seems to be the standard for just about everything but some race tires.
in 25.50x15.50x15
the 25.50 is the outside diameter of the tire
the 15.5 is the width of the tire (tread or total width, I don't know?)
the 15 is of course the wheel diameter.
wheras in 275/50/15
275 is the tread width
15 is again the wheel diameter
and 50 is the 'aspect ratio' of the sidewall. A 50-series 275 will have a proportionally taller sidewall that a 50-series 255.
The inch system is nice and straightforward but the latter system seems to be the standard for just about everything but some race tires.
