pitroad01
join:2006-07-10
Raleigh, NC | Tire size question
The 2005 Honda Civic Ex SA I just bought calls for 15" tires. The vehicle has 14" tires on it. Does that throw off anything or is it OK. |
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Doctor Olds
I Need A Remedy For What's Ailing Me.
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join:2001-04-19
1970 442 W30
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| »consumerguideauto.howstuffworks.···ivic.htm
quote:
The Si includes a sport suspension and 16-inch wheels. Wheels are 15 inches for LX and EX models, 14s elsewhere. The new top-line Civic is the EX-based Special Edition coupe and sedan.
Its possible it came from the Dealer that way even though the EX is supposedly fitted with 15" wheels. It shouldn't cause any issues.
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aurgathor
join:2002-12-01
Lynnwood, WA | reply to pitroad01
Wheel diameter is mostly irrelevant, it's the outside diameter of the tire that matters.
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pitroad01
join:2006-07-10
Raleigh, NC
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Well I found out that running 14" tires on a car that was built for 15" causes the speedometer and odometer to error. The tire size is programed into the cars processors. So my speed and mileage are off by about 7%. I took a 400 mile trip and used my GPS to monitor speed and distance against the cars speedometer and odometer. I really don't care about the speedometer being off but I do about the odometer. I am logging 7% more miles then are actually being driven. Sucks .... expensive to correct and put 15" wheels and tires on at this point. Best I can find are 15" used Honda aluminum wheels for $150.00 each and then I have to buy tires. |
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Doctor Olds
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| said by pitroad01  :Well I found out that running 14" tires on a car that was built for 15" causes the speedometer and odometer to error. The tire size is programed into the cars processors. So my speed and mileage are off by about 7%. You are leaving out what size the Tire is that is installed on the 14" rim. Without knowing that and without knowing a few other factors you are possibly incorrect about the 7% difference.
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pitroad01
join:2006-07-10
Raleigh, NC
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| said by Doctor Olds :said by pitroad01 :Well I found out that running 14" tires on a car that was built for 15" causes the speedometer and odometer to error. The tire size is programed into the cars processors. So my speed and mileage are off by about 7%. You are leaving out what size the Tire is that is installed on the 14" rim. Without knowing that and without knowing a few other factors you are possibly incorrect about the 7% difference. The tires are P185 60 R14 .... 14" tires |
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Doctor Olds
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1970 442 W30
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2 edits | reply to pitroad01
And this is a Civic 4-Door Sedan, correct?
Which one in the Yellow highlighted image below is yours?
There is a 185/70-14 that is used on these 2 Models:
»www.tirerack.com/tires/SelectTir···ModClar=
Original Equipment Sizes for 2005 Honda Civic Value Package Coupe
Description Size
Original Equipment Size 1: 185/70-14
»www.tirerack.com/tires/SelectTir···ModClar=
Original Equipment Sizes for 2005 Honda Civic Value Package Sedan
Description Size
Original Equipment Size: 185/70-14 |
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pitroad01
join:2006-07-10
Raleigh, NC
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| My Civic is a 4DR EX SE (4 speed automatic)
I have the original sticker and it says :
Special Edition Features Include:
AM/FM 6-Disk in-dash CD audio System with 6 Speakers & MP3 Playback
Leather-Wrapped Steering Wheel
15" X 6.0" 15-Spoke Alloy Wheels
Wing Spoiler
The car was built in Canada and sold at a dealer in North Carolina. A private Honda garage was able to research the VIN and found that it was built with 15" wheels. The sticker says it had P195/60 R15 87H All-Season Tires. |
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Doctor Olds
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1 edit | said by pitroad01 :My Civic is a 4DR EX SE (4 speed automatic) I have the original sticker and it says : The sticker says it had P195/60 R15 87H All-Season Tires. Then you should have returned to Dealer when you determined the tires/rims were not the correct OE size.
»www.tiresizecalculator.info/
quote:
Original tire [195/60R15]
Sidewall: 4.61 in
Radius: 12.11 in
Diameter: 24.21 in
Circumf: 76.07 in
Revs/mile: 832.96
New Tire [185/60R14]
Sidewall: 4.37 in
Radius: 11.37 in
Diameter: 22.74 in
Circumf: 71.44 in
Revs/mile: 886.89
Speedometer reading with new tire is 6.08% too fast.
When your speedometer is reading 60mph you are actually traveling 56.11mph.
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markwp2001
Spreadhead
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join:2002-05-25
Long Beach, MS
| reply to Doctor Olds
said by Doctor Olds :said by pitroad01 :Well I found out that running 14" tires on a car that was built for 15" causes the speedometer and odometer to error. The tire size is programed into the cars processors. So my speed and mileage are off by about 7%. You are leaving out what size the Tire is that is installed on the 14" rim. Without knowing that and without knowing a few other factors you are possibly incorrect about the 7% difference. I believe he got the 7% figure by comparing his odometer reading to the GPS reading of miles driven.
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pitroad01
join:2006-07-10
Raleigh, NC
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| said by markwp2001 :said by Doctor Olds :said by pitroad01 :Well I found out that running 14" tires on a car that was built for 15" causes the speedometer and odometer to error. The tire size is programed into the cars processors. So my speed and mileage are off by about 7%. You are leaving out what size the Tire is that is installed on the 14" rim. Without knowing that and without knowing a few other factors you are possibly incorrect about the 7% difference. I believe he got the 7% figure by comparing his odometer reading to the GPS reading of miles driven. I threw out the figures I had recorded for the trip but it came to like 93% .... + or - a little. |
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Doctor Olds
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1970 442 W30
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| reply to markwp2001
said by markwp2001 :I believe he got the 7% figure The difference value is seen in the post directly above yours which was determined by »www.tiresizecalculator.info/ after the tire sizes were posted.
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pitroad01
join:2006-07-10
Raleigh, NC
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| said by Doctor Olds :said by markwp2001 :I believe he got the 7% figure The difference value is seen in the post directly above yours which was determined by » www.tiresizecalculator.info/ after the tire sizes were posted. That's a neat site. I'm sure their numbers are correct. I guess I'm stuck. I was hoping they could make a change in the car processor to calculate speed and distance with a 14" tire but evidently they can't. I wonder if there is a certain size 14" that would work ? |
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Doctor Olds
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1970 442 W30
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| If you want the same width tire then:
Original tire [195/60-15]
Sidewall: 4.61 in
Radius: 12.11 in
Diameter: 24.21 in
Circumf: 76.07 in
Revs/mile: 832.96
New Tire [215/60-14]
Sidewall: 5.08 in
Radius: 12.08 in
Diameter: 24.16 in
Circumf: 75.89 in
Revs/mile: 834.86
Speedometer reading with new tire is 0.23% too fast.
When your speedometer is reading 60mph you are actually traveling 59.86mph.
or
Original tire [195/60-15]
Sidewall: 4.61 in
Radius: 12.11 in
Diameter: 24.21 in
Circumf: 76.07 in
Revs/mile: 832.96
New Tire [225/60-14]
Sidewall: 5.31 in
Radius: 12.31 in
Diameter: 24.63 in
Circumf: 77.38 in
Revs/mile: 818.85
Speedometer reading with new tire is 1.72% too slow.
When your speedometer is reading 60mph you are actually traveling 61.02mph.
or 65 series (not as wide)
Original tire [195/60-15]
Sidewall: 4.61 in
Radius: 12.11 in
Diameter: 24.21 in
Circumf: 76.07 in
Revs/mile: 832.96
New Tire [205/65-14]
Sidewall: 5.25 in
Radius: 12.25 in
Diameter: 24.49 in
Circumf: 76.94 in
Revs/mile: 823.45
Speedometer reading with new tire is 1.15% too slow.
When your speedometer is reading 60mph you are actually traveling 60.68mph.
or 70 series
Original tire [195/60-15]
Sidewall: 4.61 in
Radius: 12.11 in
Diameter: 24.21 in
Circumf: 76.07 in
Revs/mile: 832.96
New Tire [185/70-14]
Sidewall: 5.10 in
Radius: 12.10 in
Diameter: 24.20 in
Circumf: 76.02 in
Revs/mile: 833.50
Speedometer reading with new tire is 0.07% too fast.
When your speedometer is reading 60mph you are actually traveling 59.96mph.
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What’s the point of owning a supercar if you can’t scare yourself stupid from time to time? |
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pitroad01
join:2006-07-10
Raleigh, NC | So what you are saying is that I could correct my problem with a 225/60/14 ...... I wonder if that tire would fit on my current 14" rim ? |
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BonezX
Basement Dweller
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join:2004-04-13
Canada
1 edit | reply to aurgathor
said by aurgathor :Wheel diameter is mostly irrelevant, it's the outside diameter of the tire that matters. if it doesn't clear the brake calipers or impedes proper cooling of the brakes it is a problem.
also having smaller tires effects braking, as well as other things |
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Doctor Olds
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1970 442 W30
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| reply to pitroad01
said by pitroad01 :So what you are saying is that I could correct my problem with a 225/60/14 ...... I wonder if that tire would fit on my current 14" rim ? Actually the 70 Series fits better with the closest to the original revolutions per mile.
This helps visually:
»www.miata.net/garage/tirecalc.html
The second choice 225/60-14
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What’s the point of owning a supercar if you can’t scare yourself stupid from time to time? |
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Doctor Olds
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| reply to BonezX
said by BonezX :if it doesn't clear the brake calipers or impedes proper cooling of the brakes it is a problem. also having smaller tires effects braking, as well as other things He already has had the 14" Rims and has been driving on them since he got the car and changing the tires size will not make any changes to the existing rims dimensions. The Value Edition Model in 2005 comes with the same 14" Rim.
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What’s the point of owning a supercar if you can’t scare yourself stupid from time to time? |
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pitroad01
join:2006-07-10
Raleigh, NC | reply to Doctor Olds
yea maybe the P185/70/R14
It would probably look a lot better then a really wide tire (225) |
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Its a Secret
Whatever
Premium
join:2008-02-23
U B Funny | reply to pitroad01
You'll get better gas mileage as well.  |
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