215 tires mess up speedometer? - JeepForum.com

 
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post #1 of 13 Old 12-06-2011, 04:49 PM Thread Starter
ONeil1234
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215 tires mess up speedometer?

I just bought my jeep about a month ago and the guy just recently installed some 215/70r16's on my jeep. When im on the highway and going 120kph i usually pass all the cars infront of me with my girlfirends accord. But with this jeep im going 120 and everyone is passing me. Just wondering if smaller tires like that can throw of the speedometer and make it seem like im going faster when im not. Also can having smaller tires than recommended in the manual hurt anything on my jeep? Thanks

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post #2 of 13 Old 12-06-2011, 05:16 PM
KoreaZJ
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Smaller tires, actual speed is slower than speedo displays.
Put a GPS in there and compare the speed.
Previous owners may have changed the speedo gear.
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post #3 of 13 Old 12-06-2011, 05:35 PM Thread Starter
ONeil1234
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yea thats what i was implying when i said everyone was passing me in my jeep. This guy wasnt the kind of guy to change the speedo gear( im guessing that means rear gear ratio?) Can having smaller tires hurt anything mechanically?
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post #4 of 13 Old 12-06-2011, 05:39 PM
PolkaPower
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No they are fine. My speedo is 2-3 MPH slower according to my GPS with larger tires. Speedometers are not accurate anyway.
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post #5 of 13 Old 12-06-2011, 05:41 PM
KoreaZJ
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Won't hurt anything.
My 94 came stock with 215's. Then I changed to 225, then 235, now LT30X9.50
Make sure they're all the same size, especially if you have an NP249 tcase.
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post #6 of 13 Old 12-06-2011, 06:24 PM Thread Starter
ONeil1234
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ok thanks lads.
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post #7 of 13 Old 12-06-2011, 08:48 PM Thread Starter
ONeil1234
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just a quick question, im doing some minor front end work ( end links, sway bar bushings, shocks) this weekend and i was wondering if i need lube up those bushings with grease before i install them?
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post #8 of 13 Old 12-07-2011, 09:04 PM Thread Starter
ONeil1234
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I just got done spraying some rust loostener for the bolts on my end links and shocks, and i was looking at the top of the stock shock and there doesnt seem to be a bolt or anything to unscrew up top....is it hiddin up underneath the fender liner?? or do you have to undew the bolt by opening hood and coming from the top through the engine?
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post #9 of 13 Old 12-08-2011, 01:05 PM
isenior
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I'm on 225 70 16 and my speedo reads 5 mph higher than my sat nav says I'm going.

ZJ97purpleUK
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post #10 of 13 Old 12-08-2011, 01:21 PM
moggie99
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Quote:
Originally Posted by ONeil1234 View Post
I just got done spraying some rust loostener for the bolts on my end links and shocks, and i was looking at the top of the stock shock and there doesnt seem to be a bolt or anything to unscrew up top....is it hiddin up underneath the fender liner?? or do you have to undew the bolt by opening hood and coming from the top through the engine?
This one

Richard Moss
'96 ZJ 4L auto, '95 XJ 4L manual, 2000 Nissan Patrol Y61
In the UK: 1969 MGC GT
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post #11 of 13 Old 12-08-2011, 01:23 PM Thread Starter
ONeil1234
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k thanks
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post #12 of 13 Old 12-08-2011, 02:25 PM Thread Starter
ONeil1234
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does anyone have any advice on the easiest way to take off the front left ( drivers side) shock with all the brake fluid lines and resivoir?
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post #13 of 13 Old 12-08-2011, 02:31 PM
ratmonkey
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Quote:
Originally Posted by ONeil1234 View Post
does anyone have any advice on the easiest way to take off the front left ( drivers side) shock with all the brake fluid lines and resivoir?
extenstions and wobbles.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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