Comments on: How to calculate the correct tyre size when upgrading or downgrading your wheel size? http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/ Paul Tan on the Automotive Industry Wed, 15 Feb 2012 04:02:11 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: armandd http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255731 armandd Mon, 17 Aug 2009 02:15:17 +0000 http://paultan.org/?p=16124#comment-255731 here's another one, complete with tyre width, offset, revs per mile, whether the new rim will hit the fender or not, other size suggestion etc etc... <a href="http://www.rims-n-tires.com/rt_specs.jsp" rel="nofollow">http://www.rims-n-tires.com/rt_specs.jsp</a> here's another one, complete with tyre width, offset, revs per mile, whether the new rim will hit the fender or not, other size suggestion etc etc…

http://www.rims-n-tires.com/rt_specs.jsp

]]> By: awak http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255719 awak Sun, 16 Aug 2009 22:20:18 +0000 http://paultan.org/?p=16124#comment-255719 tyre circumfrace. gearbox ratios. with calculations, this data enebles you to find speed of the car in relation to rpm. tyre circumfrace.

gearbox ratios.

with calculations, this data enebles you to find speed of the car in relation to rpm.

]]> By: Insomniac http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255715 Insomniac Sun, 16 Aug 2009 21:28:58 +0000 http://paultan.org/?p=16124#comment-255715 Hi, Just popped in to see where the sudden influx of traffic came from. Glad you like my wee utility, its basic compared to some but I was going for ease of use over masses of numbers. I'm currently developing V2 of the calculator as well as a visual wheel offset calculator. If anybody has an idea or suggestion for ways to improve the caculator then please feel free to leave a comment here: <a href="http://www.kouki.co.uk/tyre-size-calculator-v2-wishlist" rel="nofollow">http://www.kouki.co.uk/tyre-size-calculator-v2-wi...</a> PS, for those confused about the term "rolling radius", don't be. Its a daft term I picked up somewhere and probably only makes sense in my head. It is actually the circumference of the wheel & tyre combination. Hi,

Just popped in to see where the sudden influx of traffic came from. Glad you like my wee utility, its basic compared to some but I was going for ease of use over masses of numbers. I'm currently developing V2 of the calculator as well as a visual wheel offset calculator.

If anybody has an idea or suggestion for ways to improve the caculator then please feel free to leave a comment here:
http://www.kouki.co.uk/tyre-size-calculator-v2-wi…

PS, for those confused about the term "rolling radius", don't be. Its a daft term I picked up somewhere and probably only makes sense in my head. It is actually the circumference of the wheel & tyre combination.

]]> By: ivan98 http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255520 ivan98 Sat, 15 Aug 2009 13:50:49 +0000 http://paultan.org/?p=16124#comment-255520 <a href="http://www.rims-n-tires.com/rt_specs.jsp" rel="nofollow">http://www.rims-n-tires.com/rt_specs.jsp</a> is the most complete online calculator in this tire size comparison I've seen. http://www.rims-n-tires.com/rt_specs.jsp is the most complete online calculator in this tire size comparison I've seen.

]]> By: jonny blaze http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255505 jonny blaze Sat, 15 Aug 2009 10:30:58 +0000 http://paultan.org/?p=16124#comment-255505 sorry for double post. my post didn't appear at when I checked at 10.24am, so I resubmitted my comment. and that is when the double appeared.. sorry for double post.

my post didn't appear at when I checked at 10.24am, so I resubmitted my comment.

and that is when the double appeared..

]]> By: jonny blaze http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255503 jonny blaze Sat, 15 Aug 2009 10:24:52 +0000 http://paultan.org/?p=16124#comment-255503 Rolling radius = radius of wheel + height of tyre's sidewall eg 205/50/16 205 is the width of the tyre in millimeters 50 is the profile or aspect ratio or sidewall height, expressed in percentage of width, 50% of 205 = 102.50mm 16 is the diameter of the wheel in inches radius is 1/2 of diameter, 16/2 = 8 inches 1 inch = 25.4mm, 8 inches = 25.4 x 8 = 203.20mm Therefore, rolling radius = 203.2 + 102.5 = 305.70mm Rolling radius = radius of wheel + height of tyre's sidewall

eg 205/50/16

205 is the width of the tyre in millimeters

50 is the profile or aspect ratio or sidewall height, expressed in percentage of width,

50% of 205 = 102.50mm

16 is the diameter of the wheel in inches

radius is 1/2 of diameter, 16/2 = 8 inches

1 inch = 25.4mm,

8 inches = 25.4 x 8 = 203.20mm

Therefore, rolling radius = 203.2 + 102.5 = 305.70mm

]]> By: jonny blaze http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255497 jonny blaze Sat, 15 Aug 2009 08:59:05 +0000 http://paultan.org/?p=16124#comment-255497 Rolling radius = radius of wheel + height of sidewall eg 205/50/16 205 is width of tyre in millimeter 50 is the profile or aspect ratio or height of the sidewall of the tyre and is expressed in percentage of width, 50% of 205 = 102.50mm 16 is the diameter of the wheel in inches radius of wheel is 1/2 of its diameter, 16/2= 8 inches 1 inch = 25.4mm 8 inches = 25.4 x 8 = 203.20mm Therefore, rolling radius = 203.2 + 102.5 = 305.70mm Rolling radius = radius of wheel + height of sidewall

eg 205/50/16

205 is width of tyre in millimeter

50 is the profile or aspect ratio or height of the sidewall of the tyre and is expressed in percentage of width, 50% of 205 = 102.50mm

16 is the diameter of the wheel in inches

radius of wheel is 1/2 of its diameter, 16/2= 8 inches

1 inch = 25.4mm

8 inches = 25.4 x 8 = 203.20mm

Therefore, rolling radius = 203.2 + 102.5 = 305.70mm

]]> By: bugger http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255489 bugger Sat, 15 Aug 2009 01:31:26 +0000 http://paultan.org/?p=16124#comment-255489 yipeee~~ for my case: from 175/70/13 to 195/50/15 only 0.1% difference ;) yipeee~~

for my case:

from 175/70/13

to 195/50/15 only 0.1% difference ;)

]]> By: DCRS http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255488 DCRS Sat, 15 Aug 2009 01:18:13 +0000 http://paultan.org/?p=16124#comment-255488 <a href="http://www.wheelsmaster.com/rt_specs.jsp" rel="nofollow">http://www.wheelsmaster.com/rt_specs.jsp</a> What about this 1. http://www.wheelsmaster.com/rt_specs.jsp

What about this 1.

]]> By: mikasa http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255483 mikasa Sat, 15 Aug 2009 00:23:25 +0000 http://paultan.org/?p=16124#comment-255483 no need to click .just choose all the number given no need to click .just choose all the number given

]]> By: DCRS http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255477 DCRS Fri, 14 Aug 2009 23:06:39 +0000 http://paultan.org/?p=16124#comment-255477 <a href="http://www.1010tires.com/TireSizeCalculator.asp" rel="nofollow">http://www.1010tires.com/TireSizeCalculator.asp</a> My regular tire size calculator http://www.1010tires.com/TireSizeCalculator.asp

My regular tire size calculator

]]> By: shah333 http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255476 shah333 Fri, 14 Aug 2009 22:01:35 +0000 http://paultan.org/?p=16124#comment-255476 try this.. <a href="http://www.wheelsmaster.com/rt_specs.jsp" rel="nofollow">http://www.wheelsmaster.com/rt_specs.jsp</a> try this..

http://www.wheelsmaster.com/rt_specs.jsp

]]> By: Paul Tan http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255464 Paul Tan Fri, 14 Aug 2009 19:51:40 +0000 http://paultan.org/?p=16124#comment-255464 rolling radius is circumference, not diameter. rolling radius is circumference, not diameter.

]]> By: acerman http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255460 acerman Fri, 14 Aug 2009 18:52:52 +0000 http://paultan.org/?p=16124#comment-255460 How to use this application, cannot click on anything. How to use this application, cannot click on anything.

]]> By: shan http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255457 shan Fri, 14 Aug 2009 18:40:51 +0000 http://paultan.org/?p=16124#comment-255457 damn difficult to explain this to uncles and pa's about the importance of tire sizes...at the tire shops, once the rim size matches, its an all go...little do they take into account the profile, diameters and other relevant measurements...sigh damn difficult to explain this to uncles and pa's about the importance of tire sizes…at the tire shops, once the rim size matches, its an all go…little do they take into account the profile, diameters and other relevant measurements…sigh

]]> By: Xoomie http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255453 Xoomie Fri, 14 Aug 2009 17:44:34 +0000 http://paultan.org/?p=16124#comment-255453 try this site <a href="http://www.1010tires.com/tiresizecalculator.asp" rel="nofollow">http://www.1010tires.com/tiresizecalculator.asp</a> try this site

http://www.1010tires.com/tiresizecalculator.asp

]]> By: tayamaster http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255450 tayamaster Fri, 14 Aug 2009 17:34:22 +0000 http://paultan.org/?p=16124#comment-255450 how to measure the rolling radius? how come diameter is alot smaller than radius? pls clarify how to measure the rolling radius? how come diameter is alot smaller than radius? pls clarify

]]> By: 2fast http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255445 2fast Fri, 14 Aug 2009 16:41:57 +0000 http://paultan.org/?p=16124#comment-255445 I usually go to this site to check tyre sizes <a href="http://www.miata.net/garage/tirecalc.html" rel="nofollow">http://www.miata.net/garage/tirecalc.html</a> Instead of Flash it uses Java. I usually go to this site to check tyre sizes

http://www.miata.net/garage/tirecalc.html

Instead of Flash it uses Java.

]]> By: Simon http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255442 Simon Fri, 14 Aug 2009 16:11:47 +0000 http://paultan.org/?p=16124#comment-255442 wonderfull ! wonderfull !

]]> By: Simon http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255441 Simon Fri, 14 Aug 2009 16:11:12 +0000 http://paultan.org/?p=16124#comment-255441 best !!! best !!!

]]> By: B33MER http://paultan.org/2009/08/14/how-to-calculate-the-correct-tyre-size-when-upgrading-or-downgrading-your-wheel-size/#comment-255440 B33MER Fri, 14 Aug 2009 16:09:24 +0000 http://paultan.org/?p=16124#comment-255440 Nice one paul :) Nice one paul :)

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