tire replacement and speedo issue
11-06-2004, 07:11 PM
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tire replacement and speedo issue
My 2.5TL with stock (15") wheels needed new tires. I had Goodyears but this time I got some rather reasonably priced Kumhos ECTSA HP4 stock size P205-60/R15. Turns out that after replacing tires the speedometer and odometer both indicate some problems. On a 600 mile journey the odometer now reads 614 positively I am going a bit slower than 70 mph when my speedometer reads 70mph because people kept passing me 
. Ofcourse this is not the correct speed test but wondering if anyone ever noticed such issues?
I am thinking that these new tires are probably about 3 or 5 mm smaller in diameter but can this happen for tires of same size as the previous set?
. Ofcourse this is not the correct speed test but wondering if anyone ever noticed such issues?I am thinking that these new tires are probably about 3 or 5 mm smaller in diameter but can this happen for tires of same size as the previous set?
11-06-2004, 07:12 PM
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Sometimes yes. Depends on your PSI as well.
11-06-2004, 07:56 PM
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TL no more!
I have the same problem too. I actually had to drive close to 75 mph in order to keep up with traffic. Also, when I tried to match my trip odometer with the mile posts on the highway, it reaches the mile about 0.07 miles too soon.
11-06-2004, 08:13 PM
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You could try tires that are 205/65 R15's
Thats what is on the 3.2's. Slightly larger overal diameter.
Thats what is on the 3.2's. Slightly larger overal diameter.
11-07-2004, 08:55 AM
#6
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Originally Posted by Ken1997TL
You could try tires that are 205/65 R15's
Thats what is on the 3.2's. Slightly larger overal diameter.
Thats what is on the 3.2's. Slightly larger overal diameter.
11-07-2004, 08:58 AM
#7
i THINK that usually with a smaller sidewall the car will take bumps much harder... it makes sense cause there is less cushion and bounce play... think about it when u have bigger rims and a smaller tire... when u hit that pothole it hurts... but my stock 15 will eat potholes all day...
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11-07-2004, 03:17 PM
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Originally Posted by WolfpackBill
The problem with that is that mine IS a 3.2TL.
11-08-2004, 11:09 AM
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This is exactly why I posted this thread in the Tires forum. From that, you would easily be able to tell that the "60" in your tire size makes your RD smaller: that makes your speedo read faster and your odometer read high.
11-08-2004, 04:25 PM
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Originally Posted by vishnus11
ken's right. i have 205/60 r15's and i get a bit of error especially on the hwy. BTW, do 205/60's ride slightly harsher than 65's because of the shorter sidewall, or is the difference unpercievable - the reason I ask is that I've never had my TL on 65's - the 60's it has now are the tire it came with when we bought it.
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