Tire size question - BMW Forum - BimmerWerkz.com
BMW Forum BMW Forum

Auto Insurance

» Featured Product
Wheel & Tire Center

Go Back   BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E36)
Register Home Forum Active Topics Gallery / Showroom Auto Loans Garage Search Today's Posts Mark Forums Read Auto EscrowInsurance

3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

BimmerWerkz.com is the premier BMW Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 06-28-2004, 08:11 PM   #1 (permalink)
3rd Gear Member
 
Join Date: May 2004
Car:
Posts: 628
Photos:
wulley1 is an unknown quantity at this point
If you put a 225-40-16 on instead of a 225-50-16, would it screw up your speedometer enough to notice? The overal diameter of the tire and wheel would be a little bit smaller than if a 50 series was installed. I'm sure the speedo would read a little bit faster than it should. Any one have any ideas or have tried this before?
wulley1 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-28-2004, 08:32 PM   #2 (permalink)
Been here a while.
 
97alpineM3's Avatar
 
Join Date: May 2004
Location: Virginia
Car: Blah
Posts: 5,375
Photos:
97alpineM3 is a name known to all97alpineM3 is a name known to all97alpineM3 is a name known to all97alpineM3 is a name known to all97alpineM3 is a name known to all97alpineM3 is a name known to all
Send a message via AIM to 97alpineM3 Send a message via MSN to 97alpineM3
I dont think you will be able to notice... but there are some crazy math guys on here.. that will probably write you out an explanation in mathmatical terms.... Your wheel will probably only travel an extra inch more with a thicker tire... than with the 40.... so if you times that extra inch by how ever many to equal a mile.. then you will probably get a decimal answer to how much it actually changes your speedometer....
__________________

1997 E36 M3 1990 E30 325i
97alpineM3 is offline   Reply With Quote
Old 06-28-2004, 09:40 PM   #3 (permalink)
Defector
 
El Presidente's Avatar
 
Join Date: Dec 2002
Location: Long Island
Car:
Posts: 5,973
Photos:
El Presidente is an unknown quantity at this point
Send a message via AIM to El Presidente
yes, there would be a difference. You may not notice, but the cop with the radar gun might. its best to know you're real speed in case you get pulled over.
__________________
<span style='color:gray'><span style='font-family:Courier'>1995 e36 3 Series RIP
1999 e46 3 Series BURN IN HELL
2000 MR-S Roadster= Current</span></span>
El Presidente is offline   Reply With Quote
Old 06-28-2004, 11:04 PM   #4 (permalink)
You Can Has A Custom Title!!
 
e36_m3_Turbo's Avatar
 
Join Date: Jan 2003
Location: Seattle, Washington
Car:
Posts: 5,253
Photos:
e36_m3_Turbo has a reputation beyond reputee36_m3_Turbo has a reputation beyond reputee36_m3_Turbo has a reputation beyond reputee36_m3_Turbo has a reputation beyond reputee36_m3_Turbo has a reputation beyond reputee36_m3_Turbo has a reputation beyond reputee36_m3_Turbo has a reputation beyond reputee36_m3_Turbo has a reputation beyond reputee36_m3_Turbo has a reputation beyond reputee36_m3_Turbo has a reputation beyond reputee36_m3_Turbo has a reputation beyond repute
Quote:
Originally posted by El Presidente@Jun 28 2004, 09:20 PM
yes, there would be a difference. You may not notice, but the cop with the radar gun might. its best to know you're real speed in case you get pulled over.
yes i second that, lik my car is 5 mph off, haha ghetto huh, and i cant change it. :
__________________
<img src="http://i4.photobucket.com/albums/y149/QnRainStar/e30-blackangus032.jpg" alt="Image hosted by Photobucket.com">

No longer red.
e36_m3_Turbo is offline   Reply With Quote
Old 06-28-2004, 11:27 PM   #5 (permalink)
Neutral Member
 
mixalot's Avatar
 
Join Date: Jun 2004
Location: Iowa
Car: 2006 X3, but I'm a 3-series guy
Posts: 87
Photos:
mixalot is an unknown quantity at this point
Use this link for the exact difference.

gauge speed 60
true speed 55.7 mph


http://www.miata.net/garage/tirecalc.html
__________________
Past ownership: 1987 325is, 1988 325i, 1995 325is, 1996 325i Convertible, 1994 325is.

Current ownership (wife's): 2006 X3 3.0i

Future ownership: 3-series of some sort

My office.
My law blog.
mixalot is offline   Reply With Quote
Old 06-29-2004, 07:22 AM   #6 (permalink)
3rd Gear Member
 
Join Date: May 2004
Car:
Posts: 628
Photos:
wulley1 is an unknown quantity at this point
great website! thanks for the help.
wulley1 is offline   Reply With Quote
Old 06-29-2004, 09:10 AM   #7 (permalink)
You Can Has A Custom Title!!
 
CiscoKid's Avatar
 
Join Date: Apr 2004
Location: South Jersey, USA
Car:
Posts: 2,195
Photos:
CiscoKid is an unknown quantity at this point
Send a message via AIM to CiscoKid
my friends m3 has differant speeds on the OBC and the spedo? wtf?
__________________
CiscoKid is offline   Reply With Quote
Old 06-29-2004, 09:19 AM   #8 (permalink)
Threadkiller
 
bitcore's Avatar
 
Join Date: Jan 2004
Location: High Point, NC
Car:
Posts: 2,907
Photos:
bitcore will become famous soon enoughbitcore will become famous soon enough
Send a message via ICQ to bitcore Send a message via AIM to bitcore Send a message via MSN to bitcore
haha
__________________

bitcore is offline   Reply With Quote
Old 06-29-2004, 02:17 PM   #9 (permalink)
3rd Gear Member
 
Q_BMW's Avatar
 
Join Date: Jun 2004
Location: Illinois USA
Car:
Posts: 567
Photos:
Q_BMW is an unknown quantity at this point
Send a message via AIM to Q_BMW Send a message via MSN to Q_BMW
ya
my OBC shows a few miles lower too...wonder if the OBC is doing the calculations and giving us the real (cop) speed?
Q
__________________
<span style='font-size:15pt;line-height:100%'><span style='color:red'>JUST SOLD:</span> <span style='color:blue'>01 BMW 330i with Sport &amp; M Package(5sp)</span></span>

<span style='font-size:14pt;line-height:100%'><span style='color:blue'>Past:</span> <span style='color:red'>1996 BMW 328i</span></span>


<span style='font-size:14pt;line-height:100%'><a href='http://www.ofoto.com/BrowsePhotos.jsp?&collid=10038932107&page=1&sort_o rder=0' target='_blank'>PICTURES!!</a></span>
Q_BMW is offline   Reply With Quote
Old 06-29-2004, 03:36 PM   #10 (permalink)
3rd Gear Member
 
Join Date: May 2004
Car:
Posts: 628
Photos:
wulley1 is an unknown quantity at this point
maybe, I know mine is off by about 5 or 6 mph when I'm going 70. Pretty typical for all cars to be 5% faster than they really are.
wulley1 is offline   Reply With Quote
Old 06-29-2004, 04:20 PM   #11 (permalink)
Been here a while.
 
97alpineM3's Avatar
 
Join Date: May 2004
Location: Virginia
Car: Blah
Posts: 5,375
Photos:
97alpineM3 is a name known to all97alpineM3 is a name known to all97alpineM3 is a name known to all97alpineM3 is a name known to all97alpineM3 is a name known to all97alpineM3 is a name known to all
Send a message via AIM to 97alpineM3 Send a message via MSN to 97alpineM3
Just a guess... but I think that the obc and the speedometer read there speed from two different locations.... right or wrong?
__________________

1997 E36 M3 1990 E30 325i
97alpineM3 is offline   Reply With Quote
Old 06-29-2004, 04:49 PM   #12 (permalink)
You Can Has A Custom Title!!
 
Kevin325i's Avatar
 
Join Date: Mar 2004
Location: Madison, WI
Car:
Posts: 2,613
Photos:
Kevin325i is an unknown quantity at this point
Send a message via AIM to Kevin325i
I concure. The speedo is off of the differential and should be the little bendy bar type of speedo so as it gets old it can be off a little more. The OBC is probably reading it from the same thing, but it's electronic and doesn't have the wear-factor.

Kevin
__________________
Kevin (President TBEA)

&quot;WAAAAAAARRRRRIORS, come out to plaaaaay.&quot;
Kevin325i is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E36)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Tire Size Question - E39 540i HardStep 5-Series (E12,E28, E34, E39, E60) 2 05-06-2005 11:36 PM
325i Tire Question Ii fobbie 3-Series (E46, E90) 0 03-26-2005 08:09 PM
Tire Question dtinsman75 3-Series (E46, E90) 1 01-10-2005 12:53 PM
WHEEL and TIRE Question JL380 3-Series (E36) 1 02-05-2004 09:36 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 11:21 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.3.2
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.