| [ Total Views: 720 | Total Replies: 7 | Thread Id: 89135 ] |
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 zeroktrian
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| posted on March 7th, 2011 at 11:05 PM |
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Changing Tyre Diameter & Adjusting the Speedo
Hi All,
I'm looking at changing the tyres on my 65 Baja from 14" to 15", and was wondering how much of an issue I would have with adjusting the speedometer
to compensate?
Do-able at home?
Cheers,
S
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pod
A.k.a.: paul mrvw061
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| posted on March 7th, 2011 at 11:50 PM |
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it would have been 15" tyres to start with when a standard beetle,so maybe your speedo has read wrong all the time
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vwo60
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| posted on March 8th, 2011 at 09:06 AM |
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Depends on the diametre of the new tyres, you can work out the change in the speedo reading by compairing the diametre of the new and old tyres , you
can then take the speedo to a instument repair shop and they can recalibrate it to suit.
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ahoogah
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| posted on March 8th, 2011 at 03:40 PM |
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http://www.generalauto.com.au/index.htm
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waveman1500
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| posted on March 8th, 2011 at 06:40 PM |
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The rim size is irrelevant, the important thing is the overall diameter of your tyres. What tyre size are you planning on using? The stock tyres were
something like 155/80R15, so if you're upgrading to a 195mm section width, then 195/65R15 will get you pretty much spot on. http://www.willtheyfit.com/ is a good calculator to use.
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68AutoBug
A.k.a.: Lee Noonan
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| posted on March 9th, 2011 at 05:24 PM |
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| Quote: | Originally
posted by zeroktrian
Hi All,
I'm looking at changing the tyres on my 65 Baja from 14" to 15", and was wondering how much of an issue I would have with adjusting the speedometer
to compensate?
Do-able at home?
Cheers,
S
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Hi
The speedo is non adjustable to the home mechanic....
so, tyre sizes are the easiest way to go....
although the tyres needed to set the speedo correct may be expensive.... $$
cheers
LEE
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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zeroktrian
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| posted on March 11th, 2011 at 12:29 AM |
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Hey All,
Cheers for the comments. I'm currently running 205/65/R14 tyres at what I believe to be a correct/accurate speedo reading. So presumably from what
has previously been said I can use this (and potentially rim-size?) to figure out what tyre I can "transfer to" to 'keep the speedo happy'?
Cheers,
S
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 barls
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| posted on March 11th, 2011 at 09:23 AM |
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from memory the closest tires size to stock is 205/65/15. so with what your saying your actually undersize by about 80 odd mm in the rolling diameter
with the 14 inch rims
try playing here and remember that the stock tire size was originally 165/100/r15
http://www.miata.net/garage/tirecalc.html
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