93CivicSI

Got a speeding ticket (77 / 65)- told the officer that I had my cruise set at 74 - he told me to have my speedometer calibrated - go to a shop that he recommended - with my existing tires (195/50-15) on 15 x 6.5 inch alloys - speedometer reads incorrectly - 75 indicated was actually 78...

With my winter tires 195/55-15 on 15 x 6.5 steelies it was dead accurate....

If I plus1 the stock configuration for the 93 Hatch (185/60/14 original) I come up with 195/50-15 - same rolling diameter between the two - what gives?????

Rodney

what motor do you have?

96 SOHC VTEC

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rodney &raquo;</TD></TR><TR><TD CLASS="quote">what motor do you have?</TD></TR></TABLE>

Does that make a difference?

Rodney

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96 SOHC VTEC &raquo;</TD></TR><TR><TD CLASS="quote">

Does that make a difference?</TD></TR></TABLE>

yes.

Navid OG

1st of all motor does not make a difference (not in this case)

if ur using the wrong profile ur speedometer will be inaccurate...... i also learned that the hard way.

Rodney

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Navid OG &raquo;</TD></TR><TR><TD CLASS="quote">1st of all motor does not make a difference (not in this case).</TD></TR></TABLE>

YES it does make a difference. if he is using a motor, or should i say an engine swap, that would dictate what tire size would have an accurate speedo.

Padawan

You're correct with the 195/50-15's (assuming that the car's original size was 185/60-14). The 195/55-15's are the ones that should be giving you the problem, and they would/should indeed give you and indicated 75 MPH on the speedometer when you are actually traveling 78. Try measuring the actual diameters of the stock and aftermarket setups, to see if perhaps the sizing runs large on your particular tires.

Rodney

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Padawan &raquo;</TD></TR><TR><TD CLASS="quote">You're correct with the 195/50-15's (assuming that the car's original size was 185/60-14). The 195/55-15's are the ones that should be giving you the problem, and they would/should indeed give you and indicated 75 MPH on the speedometer when you are actually traveling 78. Try measuring the actual diameters of the stock and aftermarket setups, to see if perhaps the sizing runs large on your particular tires. </TD></TR></TABLE>

but, does he have a swap?

Padawan

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rodney &raquo;</TD></TR><TR><TD CLASS="quote"> but, does he have a swap? </TD></TR></TABLE>

Even if the larger 195/55-15's were the correct size for that particular application (i.e. GS-R, ITR), running 195/50's should result in the speedometer reading higher than the actual speed, not lower. I'm not sure how many applications would call for a tire that was smaller than a 185/60-14 (CX/VX maybe?) That being said, what is happening in his case doesn't appear to make any sense, no matter how one looks at it.

Edit: Mainly because he claims to have no problems with the 195/55-15's, but finds that the 195/50-15's give a higher-than-indicated speed.

Rodney

thanks padawan. i just wanted to get accurate info on hardware beforehand.

Padawan

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rodney &raquo;</TD></TR><TR><TD CLASS="quote">thanks padawan. i just wanted to get accurate info on hardware beforehand. </TD></TR></TABLE>

No problem. I understand what you're saying, but I'm just extremely confused by the situation. To the original poster, are you 100% sure that the tire sizes you've posted are accurate?

BauleyCivic

Why did they give you a 77 in a 65 ticket anyway? Thats ******* gay

lsvtec hatch05

cops are gay like that

sil

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93CivicSI &raquo;</TD></TR><TR><TD CLASS="quote">If I plus1 the stock configuration for the 93 Hatch (185/60/14 original) I come up with 195/50-15 - same rolling diameter between the two - what gives?????</TD></TR></TABLE>
hrmmm.. i thought civics with 14" diameter rims had 185/65/14 tires stock? Because if that's the case it's nearly dead on rolling diameter of 195/55/15

Rodney

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sil &raquo;</TD></TR><TR><TD CLASS="quote">
hrmmm.. i thought civics with 14" diameter rims had 185/65/14 tires stock? </TD></TR></TABLE>

92-95 si or 93/95 ex coupe ran the 185/60-14 stock. 96-00 civic ex's had 185/65-14's.

shauniewalnuts

im runnin 17's with 205/40 how much + OR - do you think my speedo is off, 97 ex coupe

Rodney

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by shaun311 &raquo;</TD></TR><TR><TD CLASS="quote">im runnin 17's with 205/40 how much + OR - do you think my speedo is off, 97 ex coupe</TD></TR></TABLE>

185/65-14= 23.46 OD
205/40-17= 23.45 OD

perfect tire size! there is always some discrepancies between manufacturers and OD, but your speedo should be right on the money

shauniewalnuts

nicccce

93CivicSI

Stock D16Z6 - original for 175,000 now..

Outrun

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lsvtec hatch05 &raquo;</TD></TR><TR><TD CLASS="quote">cops are gay like that</TD></TR></TABLE>

Stupidest response of the day.

93CivicSI

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BauleyCivic &raquo;</TD></TR><TR><TD CLASS="quote">Why did they give you a 77 in a 65 ticket anyway? Thats ******* gay</TD></TR></TABLE>

Southern Virginia State Police will write if you are going 11 or more over - PERIOD... - If you are traveling on Interstate 81 be careful from mile marker 60 to 73 regardless of North or South bound.