Heres one I found, http://www.ford-trucks.com/forums/1052197-tire-size-conversion-chart.html do ya'll have any that are better?
Thanks
Thanks
Tire size Conversion chart
- Thread starter R Q
- Start date
UTfball68
Well-Known Member
- Joined
- Jul 18, 2008
- Location
- Granite Quarry
Besides my personal beef with the creator of that site for a life time ban, I use this calculator from the Ranger Station:
http://www.therangerstation.com/tech_library/Metric_To_Inch_Tires.html
TireRack also has a good chart if you're looking for a physical print out.
http://www.therangerstation.com/tech_library/Metric_To_Inch_Tires.html
TireRack also has a good chart if you're looking for a physical print out.
Chris_Keziah
Joe Dirt @ Rev Limit Fab
- Joined
- Dec 1, 2010
- Location
- Winston-Salem
Garage buddy app on the iphone works good too.
20'' yota
Active Member
- Joined
- Apr 1, 2009
- Location
- MT.PLEASANT
i have used the app in my head for 10 years now and works well
Croatan_Kid
How's your hammer hangin'?
- Joined
- Nov 4, 2007
- Location
- New Bern
I just do the math on them. It's really easy and all the information is right in the size of the tire. Width is the first number, the second number is the aspect ratio (it tells you how tall each sidewall is as a percentage of the width), and then the rim size.
315/70-17
315 x .7= 220.5
220.5 x 2= 441
441/25.4= 17.36
17.36+17= 34.36" tall
315/25.4= 12.4" wide
Therefore it is a 34.4x12.4-17, just in case anybody was wonder how it was done. It's also pretty close with something like an 11.00R-16 Michelin. It's 11" wide and roughly 38" tall. 11x2= 22, 22+16= 38
315/70-17
315 x .7= 220.5
220.5 x 2= 441
441/25.4= 17.36
17.36+17= 34.36" tall
315/25.4= 12.4" wide
Therefore it is a 34.4x12.4-17, just in case anybody was wonder how it was done. It's also pretty close with something like an 11.00R-16 Michelin. It's 11" wide and roughly 38" tall. 11x2= 22, 22+16= 38
- Joined
- Mar 13, 2005
- Location
- Raleigh, NC
GCncsuHD
Charlie Daniels with a torque wrench
- Joined
- Jun 18, 2007
- Location
- Salisbury/Statesville
It's pretty hard to beat this calc:
http://www.1010tires.com/TireSizeCalculator.asp
You can compare 4 tires, gives size, speedometer % difference, visual representation, tires made in that size, OEM tire sizes for vehicles, etc.
But on the fly, I just do the math.
As mentioned it's really simple:
315/75R16
315 is the section width in mm.
315mm/25.4 mm/inch= 12.4".
75 is the aspect ratio, so the sidewall is 75% of the section width.
0.75x12.4"=9.3".
Since obviously you have an upper and a lower sidewall, along with the 16" diameter wheel, you have
9.3"x2+16"=34.6".
So you have a 34.6" tall tire that is 12.4" wide and mounted on a 16" wheel.
Of course these are all just approximations, as each manufacturer will differ slightly.
For example, a BFG AT 315/75R16 is 34.6"x12.2" while the KM2 is 34.8"x12.3". A Nitto Terra Grappler is 34.5"x12.3" while the Trail Grappler is 34.8"x12.8". A Cooper STT is 34.5"x11.9".
http://www.1010tires.com/TireSizeCalculator.asp
You can compare 4 tires, gives size, speedometer % difference, visual representation, tires made in that size, OEM tire sizes for vehicles, etc.
But on the fly, I just do the math.
As mentioned it's really simple:
315/75R16
315 is the section width in mm.
315mm/25.4 mm/inch= 12.4".
75 is the aspect ratio, so the sidewall is 75% of the section width.
0.75x12.4"=9.3".
Since obviously you have an upper and a lower sidewall, along with the 16" diameter wheel, you have
9.3"x2+16"=34.6".
So you have a 34.6" tall tire that is 12.4" wide and mounted on a 16" wheel.
Of course these are all just approximations, as each manufacturer will differ slightly.
For example, a BFG AT 315/75R16 is 34.6"x12.2" while the KM2 is 34.8"x12.3". A Nitto Terra Grappler is 34.5"x12.3" while the Trail Grappler is 34.8"x12.8". A Cooper STT is 34.5"x11.9".