Wheels, Tires & Brakes Modifications Post Wheel, Tire & Brake related modification information and/or questions here

Is my speedometer off??

Thread Tools
 
Search this Thread
 
Old Dec 9, 2002
  #1  
DarkCivic's Avatar
Thread Starter
Registered!!
iTrader: (1)
 
Joined: Aug 2001
Posts: 1,677
Likes: 0
From: Orange County, CA
Rep Power: 0
DarkCivic is an unknown quantity at this point
Is my speedometer off??

I just got new tires. Swapped the Deathstones with Khumo Ecsta HP 4s. The stock tire size was 185/70/14, the new tires are 195/60/14. I can tell they are a lower profile, how much will my speedometer be off? Thanks.

EDIT: I just checked the tire calculator and it said %4 faster with new tires, so does this mean if my speedo read 100mph I'd really be going 96mph?

Mohawk- you caught me before the edit. Thanks.
Reply
Old Dec 9, 2002
  #2  
mohawkboom's Avatar
Registered!!
iTrader: (1)
 
Joined: Aug 2001
Posts: 6,202
Likes: 1
From: Car Audioville, Quebec, Canada
Rep Power: 0
mohawkboom is an unknown quantity at this point
yet again....use the tire calculator conveniently located at the top right hand corner of the site (link to it)....you'll be off less than .4%..so when your speedo says 60..you'll be going 59.7ish
Reply
Old Dec 9, 2002
  #3  
Bartkat's Avatar
Premium Member
 
Joined: Oct 2001
Posts: 3,860
Likes: 0
From: Alabama, US
Rep Power: 0
Bartkat is an unknown quantity at this point
100mph I'd really be going 96mph?

this is correct. It's going to read 4% faster than your true speed.

Something else to consider, it's also going to make you odometer run faster. This will rack up miles sooner and if you are under warranty, you'll reach the 36,000 miles about 1400 miles sooner.
Reply
Old Dec 10, 2002
  #4  
AznHalfy's Avatar
Registered!!
 
Joined: Nov 2002
Posts: 113
Likes: 0
From: Ottawa, Ontario, Canada
Rep Power: 0
AznHalfy is an unknown quantity at this point
Bart its .4% not 4% faster ...

Thats all I got to say
l8tr
Reply
Old Dec 10, 2002
  #5  
Bartkat's Avatar
Premium Member
 
Joined: Oct 2001
Posts: 3,860
Likes: 0
From: Alabama, US
Rep Power: 0
Bartkat is an unknown quantity at this point
Run the tire calc.

Plug in

Stock tire = 185 70 14

The plug in

New tire = 195 60 14

Results:

Stock Circumference = 76.0166

New Circumference = 72.9245

Speedometer reading with new tire = 4.36768% too high.

Now if you want to put that in decimals for calculating purposes, that's 0.04. But in percentage numbers it's 4.0% rounded off.

If that's a problem, then talk to the tire size calculator, cause that's where I got the numbers.

Don't take my word for it. Run the numbers on the tire size calculator.
Reply
Old Dec 11, 2002
  #6  
Bartkat's Avatar
Premium Member
 
Joined: Oct 2001
Posts: 3,860
Likes: 0
From: Alabama, US
Rep Power: 0
Bartkat is an unknown quantity at this point
Well, what do you say? Do you Canadians figure things differently than us, or do you just go around agreeing with each other?

BTW: It comes out 4% in metric too.
Reply
Old Dec 11, 2002
  #7  
AznHalfy's Avatar
Registered!!
 
Joined: Nov 2002
Posts: 113
Likes: 0
From: Ottawa, Ontario, Canada
Rep Power: 0
AznHalfy is an unknown quantity at this point
Eh ... I never calced it myself ... just agreed with the guy above .. guess he cant cout ... my bad.
Reply
Old Dec 11, 2002
  #8  
Bartkat's Avatar
Premium Member
 
Joined: Oct 2001
Posts: 3,860
Likes: 0
From: Alabama, US
Rep Power: 0
Bartkat is an unknown quantity at this point
I kinda figured that. Oh well.

But heck, if you can't believe a moderator, who can you believe? [IMG]i/expressions/laugh2.gif[/IMG][IMG]i/expressions/laugh2.gif[/IMG]
Reply
Old Dec 11, 2002
  #9  
VNlilMAN's Avatar
The Standard One
iTrader: (7)
 
Joined: Sep 2001
Posts: 11,659
Likes: 1
From: City of Angels, California, US
Rep Power: 417
VNlilMAN will become famous soon enoughVNlilMAN will become famous soon enough
it was probably a typo...

and i've always said, dont value someones opinion/word more then someone else's just because he's a moderator.. we're just members with priviledges, we dont know everything and have lots to learn just like everyone else
Reply
Related Topics
Thread
Thread Starter
Honda Civic Forum
Replies
Last Post
Crazygrlinak
Mechanical Problems/Vehicle Issues and Fix-it Forum
3
Oct 8, 2015 05:06 PM
260000milesgoal
I.C.E. (Audio) & Electrical Upgrades
2
Sep 25, 2015 07:41 PM
jerry38
Mechanical Problems/Vehicle Issues and Fix-it Forum
2
Sep 20, 2015 08:38 AM
MamaBear2015
7th Generation Civic 2001 - 2005
6
Sep 15, 2015 09:35 PM
Bricoleur
Mechanical Problems/Vehicle Issues and Fix-it Forum
3
Sep 9, 2015 06:48 PM




All times are GMT -5. The time now is 01:10 PM.