Register Log In

Contour Enthusiasts Group Archives Forums Modifications Wheels & Tires Tire Size?

Print Thread

Tire Size? #1217786 03/17/05 07:05 AM
Joined: Jan 2003 Posts: 118 canton, ohio S SESportV OP CEG\'er
OP SESportV CEG\'er S Joined: Jan 2003 Posts: 118 canton, ohio	Ok so it was my understanding that the SVT 16" Wheel has a XXX/55R16..... yes, no? I was looking in a tire sizing book and it showed the stock tire sixe to be a XXX/50R16 BUT another book shows that it's XXX/55R16 I put focus 16's on my tour last winter after i dented 2 rims at once (gotta love ohio roads), but anyways i put a 205/55R16 on the wheel. (as listed on a plus sizing guide in that same book that listed a XXX/50R16 as a stock size) By doing this did I throw off my speedo, b/c both sets of info contradict themselves. SeSportV 1999 Silver Contour SE Sport MTX (2.5) Air Intake Resonator Removed Silver Rear Valence Blue Turn Signals, Nozzles, Interior LED's Custom Blue Trim Single Silver Wiper (Bad A** and Unique) 15.9 1/4 mile @ 89 MPH

Re: Tire Size? #1217787 03/17/05 09:56 AM
Joined: Dec 2004 Posts: 638 West Michigan P Pope Veteran CEG\'er
Pope Veteran CEG\'er P Joined: Dec 2004 Posts: 638 West Michigan	the difference has to do with the numbers in the xxx position. 215 / 50 / 16 = 24.46" tire height 215 / 55 / 16 = 25.31" tire height 205 / 55 / 16 = 24.88" tire height 205 / 50 / 16 = 24.07" tire height If my memory serves me... In '98 the SVT came with 205/55/16 In '99 it came with 215/50/16 same in '00 I don't know off hand what the stock dimensions were for other models though. You're looking at .42" of height difference, yes it will make a minor difference to the speedometer depending upon what your car was origionally calibrated for. Example 3rd Gear @ 4000rpm 215 / 50 / 16 = 49.5 mph 205 / 55 / 16 = 50.3 mph a difference of .8 mph I get these numbers by utilizing an Excel Spreadsheet someone on here posted a while back that does all the calculations for you when you alter tire dimensions. 87 Mustang GT 5.0L TURBO

Re: Tire Size? #1217788 03/17/05 01:32 PM
Joined: Aug 2003 Posts: 4,140 Pennsylvania A Auto-X Fil Hard-core CEG\'er
Auto-X Fil Hard-core CEG\'er A Joined: Aug 2003 Posts: 4,140 Pennsylvania	The XXX is the width in mm, the 50 or 55 is the profile, but it's not a straight sidewall measurement, it's the sidewall expressed as a percentage of tread width. This is why a Miata with 195/50R15s actually has a full 1/2 inch less sidewall than a supercar with 315/35R18s. Must read: http://www.tirerack.com/tires/tiretech/general/size.jsp and a must-bookmark: http://www.miata.net/garage/tirecalc.html -Philip Maynard '95 Contour [71 STS \| Track Whore] '97 Miata [71 ES \| Boulevard Pimp] 2006 autocross results

Re: Tire Size? #1217789 03/17/05 04:35 PM
Joined: Sep 2000 Posts: 9,602 KC, MO D DemonSVT_dup1 Hard-core CEG'er
DemonSVT_dup1 Hard-core CEG'er D Joined: Sep 2000 Posts: 9,602 KC, MO	98 & 98.5 had 205/55ZR16 - FireRocks (IIRC) 99 & 00 had 215/50ZR16 - BFG KDW A 205/55 is 24.88" A 215/50 is 24.46" Deviation is 1.66% 2000 SVT #674 13.47 @ 102 - All Motor! It was not broke; Yet I fixed it anyway.

Re: Tire Size? #1217790 04/26/05 10:13 AM
Joined: Oct 2002 Posts: 2,469 North of Redding South of Oreg... D dubkatz_dup1 Hard-core CEG'er
dubkatz_dup1 Hard-core CEG'er D Joined: Oct 2002 Posts: 2,469 North of Redding South of Oreg...	why not go with 215/55/16? It would give a slightly bigger sidewall(nicer ride) and maybe pick up a 1/2 mpg. 98 csvt t-red.. sho-shop intake, b&m, fidanza, spec1 clutch, Torsen, DMD,optimized Y& TB, Brullen, rear strut bar,h&r's,17" konig traffik's. "I say what I mean and I do what i say"

Re: Tire Size? #1217791 04/26/05 11:44 AM
Joined: Aug 2003 Posts: 4,140 Pennsylvania A Auto-X Fil Hard-core CEG\'er
Auto-X Fil Hard-core CEG\'er A Joined: Aug 2003 Posts: 4,140 Pennsylvania	Originally posted by dubkatz: why not go with 215/55/16? It would give a slightly bigger sidewall(nicer ride) and maybe pick up a 1/2 mpg. Because they are really tall = maybe rubbing, and definetly off on the spedo. Mine are 205/50... 1.3" shorter than those. -Philip Maynard '95 Contour [71 STS \| Track Whore] '97 Miata [71 ES \| Boulevard Pimp] 2006 autocross results

Tire Size? #1217792 04/26/05 10:43 PM
Joined: Sep 2004 Posts: 225 Fresno, California N NVSVT CEG\'er
NVSVT CEG\'er N Joined: Sep 2004 Posts: 225 Fresno, California	Originally posted by DemonSVT: 98 & 98.5 had 205/55ZR16 - FireRocks (IIRC) 99 & 00 had 215/50ZR16 - BFG KDW A 205/55 is 24.88" A 215/50 is 24.46" Deviation is 1.66% All true except they were Goodyear Eagle GS-C tires on the '98 & '98.5 SVT Contour. Goodyear discontinued the GS-C in late '99. Good thing too; they were really crummy tires. The Original Owner of 1998 SVT Contour #3384 of 6535, Toreador Red/Midnight Blue, Assembled September 3rd, 1997 Also the Original Owner of a 1998.5 Contour SE Sport V6 5-speed, Vibrant White/Greystone Sport Cloth, Assembled August 6th, 1998

Moderated by 1314_dup1

Link Copied to Clipboard

Powered by UBB.threads™ PHP Forum Software 7.7.5