speedometer vs. tire size - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 08-15-2000, 11:02 AM
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speedometer vs. tire size

I was wondering, if you put taller tire on does your speedometer read faster or slower than the smaller tires?

Mudsick <font color=red>'99 Silverado</font color=red> <font color=blue>'79 Blazer</font color=blue>
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post #2 of (permalink) Old 08-15-2000, 11:09 AM
 
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Re: speedometer vs. tire size

The speedo will read slower than you are going!
Also your odometer will register less miles then you have driven.
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post #3 of (permalink) Old 08-15-2000, 09:40 PM
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Re: speedometer vs. tire size

well my speedometer is 10 mph fast. SO if i put bigger tires on i could get it closer to the right reading. An exsuse to get bigger tires

Mudsick <font color=red>'99 Silverado</font color=red> <font color=blue>'79 Blazer</font color=blue>
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post #4 of (permalink) Old 08-15-2000, 09:43 PM
 
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Re: speedometer vs. tire size

Too bad it says your going slower than you are. One of my friends tried to get out of a ticket by saying the speedo was wrong and he got a ticket for a "nonfunctional speedometer"

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post #5 of (permalink) Old 08-15-2000, 11:39 PM
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Re: speedometer vs. tire size

mudsick - yea sounds like a good excuse to me [img]/wwwthreads_images/icons/wink.gif[/img] and the legal thing with speedometers is that if you go and have it tested, they will knock down your ticket, but if your speedo is more than 5 mph off, they can give you another ticket for that! so i guess youre screwed either way

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post #6 of (permalink) Old 08-16-2000, 12:44 PM
 
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Re: speedometer vs. tire size

Mudsick, I agree get bigger tires![img]/wwwthreads_images/icons/smile.gif[/img]it really will make it read closer!
If you fooled around with some different larger sizes you actually could dial it in to be perfect! you might get lucky and get it right first try!
When you go to a speedo shop that's what they do, but instead of tires they swap the plastic gear the speedo cable hooks to in the Trans, sometimes it takes a few tries before they get it right, but instead of driving it around, they just run it on a "treadmill thingy" (urgh what's that thing called???[img]/wwwthreads_images/icons/mad.gif[/img]) (assuming we are talking about your '79)

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post #7 of (permalink) Old 08-16-2000, 07:13 PM
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Re: speedometer vs. tire size

I know that the speedo gears can be changed. The guy who had the truck before me swaped Tcases and it had different gears. I am just looking for an excuse to get bigger tires so that my parents and girlfriend don't bug me about waisting my money.

Mudsick <font color=red>'99 Silverado</font color=red> <font color=blue>'79 Blazer</font color=blue>
post #8 of (permalink) Old 08-16-2000, 10:36 PM
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Re: speedometer vs. tire size

I should use that one...My parents think that I will be waisting my money if I get a 4"-6" lift and 35" m/t tires. I haven't gotten that yet, but maybe....someday.

Mike
'82 K20 Chevy (work in progress)

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