215/40/17 Tire on SVT

cconley · 11-03-2009, 01:11 PM

Has anyone had any problems with this tire size on the SVT? Any problems with the ABS??? I know there will be a minor discrepancy with the speedo, but I'm not worried about that.

2nd, anyone know what it would cost to get the different tire size programmed into the computer at a dealer?

Thanks,

Chris

SkyPilot · 11-03-2009, 01:37 PM

you will have no problems running that size tire, the difference in the size is a cm, so it will be about the size of a worn out 45 sidewall.

as far a reprograming the ecu, its such a small change it would be a waste of money in my opinion

cconley · 11-03-2009, 01:43 PM

Thanks for your 2 cents. I see you're a flight instructor... me too! Where did you go to school? I'm a UND grad. Teaching (privately) in central Iowa. Of topic, sry.

Other question is will sportlines cause rubbing on an SVT?

dirtbrown · 11-03-2009, 03:19 PM

you should be fine with that tire size....why do you want the smaller sidewall?? even a 215/45 should fine with sportlines

alex62390 · 11-03-2009, 03:49 PM

i have 205/40zr17 on my car. i do not like them and i would not recommend getting that size. they came on the car when i bought it. it is different from what you are looking at. just a warning.

focusp71 · 11-03-2009, 04:50 PM

Quote:

Originally Posted by alex62390

i have 205/40zr17 on my car. i do not like them and i would not recommend getting that size. they came on the car when i bought it. it is different from what you are looking at. just a warning.

yeah, the 205/40's suck.

i have 235/45/17 now. too big. lol. i rub on large bumps or inclines.

SkyPilot · 11-03-2009, 05:28 PM

Quote:

Originally Posted by focusp71

i have 234/45/17 now. too big. lol. i rub on large bumps or inclines.

im sure you meant 235, and damn thats a big tire for our cars.

here is a little tire math for everyone. we will use 215/45/17 for this

215= width of tire in MM
45= 45% of the first number which gives your sidewall hight, also called aspect ratio
17= of course 17 inch rim

tire widths increase by 10mm for every size 205, 215, 225 and so on.

as a rule of thumb +10 -5. when you upsize a tire to the next size you subtract 5 from the aspect ratio. and when you downsize you add 5 to the aspect ratio.

if you do the math 45% of 215= 96.75mm
if you upsize to a 225/40 and use the +10 -5, 40% of 225=90mm
Now 17inch rim is 431.8mm tall. times your aspect ratio by 2, add 431.8 and you get how tall the tire is.

Now this IS NOT going to give you the same rolling diameter of the original size, however it will get you as close as possible when going for a wider, or skinner tire. But always do the math to get an exact answer to figure out the hight of the tire to see if it will fit.

Also there is no standard on where the width of the tire is measured, this will vary slightly from each tire company, this also holds true for treadwear ratings, every company has its own standards for this. All companies test their tires the same way for the most part, but each has a slightly different rating scale.

cconley · 11-03-2009, 07:01 PM

The new tires look much better. I think the drop from the sportlines will "make the car". I'll post a couple of pics of the new tires tomorrow.

The dunlops that were on the car when I bought it looked good, but when I bought the neogens they just looked too big so I decided to downsize.

Geezer · 11-03-2009, 07:50 PM

Quote:

Originally Posted by cconley

Thanks for your 2 cents. I see you're a flight instructor... me too! Where did you go to school? I'm a UND grad. Teaching (privately) in central Iowa. Of topic, sry.

Other question is will sportlines cause rubbing on an SVT?

Rubbing is primarily the result of offset, wheel width, and tire size, how much you drop, spring rates and shocks. It's a package. With the wrong offset a softer spring (the eibach sportlines start off soft with their progressive rates) will rub. Also if the springs are allowed to compress too rapidly (e.g. big hits) a larger (wider)tire may rub. Therfore, good shocks are absolutely necessary to control/dampen the spring. What offset wheel are you using?

mlbbaseball · 11-03-2009, 08:58 PM

as long as ur @ or below a 215/45/17, ur just fine.

myfafp3 · 11-06-2009, 01:24 PM

I agree with mlb and dirtbrown. I had sportlines on mine with svt wheels and 215/45-17 tires for about a year with no problems. I even went with a 225/45-17 in the rear on the same wheels and didn't rub.
Posted via FF Mobile

gregor_42 · 11-07-2009, 01:39 PM

I have 215/40/17 right now and have had no problems so far. I would recommend watching out for the larger holes and bumps tho. I hit a big hole the other day and felt like my whole wheel fell off lol

11-03-2009, 01:11 PM	#1
cconley Focus Enthusiast Join Date: Nov 2006 FF Member#: 40920 Location: Des Moines, Iowa What I Drive: 2004 Sonic Blue Focus SVT w/EAP Posts: 133 FF Reputation: 1 Buy-Sell-Trade Rating: (0)	215/40/17 Tire on SVT Has anyone had any problems with this tire size on the SVT? Any problems with the ABS??? I know there will be a minor discrepancy with the speedo, but I'm not worried about that. 2nd, anyone know what it would cost to get the different tire size programmed into the computer at a dealer? Thanks, Chris

11-03-2009, 01:37 PM	#2
SkyPilot Flight Instructor! Join Date: Apr 2005 FF Member#: 22350 Location: North Phoenix, AZ What I Drive: 2004 Hertz Silver Ford Focus SE Posts: 2,656 FF Reputation: 30 Buy-Sell-Trade Rating: (13)	you will have no problems running that size tire, the difference in the size is a cm, so it will be about the size of a worn out 45 sidewall. as far a reprograming the ecu, its such a small change it would be a waste of money in my opinion __________________ ZETEC Crew #26 SEDAN REVOLUTION #20 Roush Stage 2 Suspension, MBRP Cat-back, Volant Intake, SVT 5 spoke rims, FC 65MM TB The former focusman6297

11-03-2009, 03:49 PM	#5
alex62390 Focus Enthusiast Join Date: Nov 2008 FF Member#: 60434 Location: MA What I Drive: 2004 svt focus EAP Posts: 311 FF Reputation: 1 Buy-Sell-Trade Rating: (0)	i have 205/40zr17 on my car. i do not like them and i would not recommend getting that size. they came on the car when i bought it. it is different from what you are looking at. just a warning. __________________ 2004 svt focus EAP 1 of 62 infra-red EAP 3 doors #658

11-03-2009, 08:58 PM	#10
mlbbaseball SNOWMOBILING 4 LIFE Join Date: Feb 2008 FF Member#: 53541 Location: Detroit MI, and Houghton MI, (college) What I Drive: 01 grey zx3 S2, cherokee, 4runner Posts: 5,510 FF Reputation: 30 Buy-Sell-Trade Rating: (37)	as long as ur @ or below a 215/45/17, ur just fine. __________________ 164.4 whp and 144.2 wtq N/A!!! 1/4 in 14.819 @ 96.32 w/ a 2.32 60 ft at 2588 lbs w/ me in the car!! FOR SALE: SVT and zetec intakes, FR head, SVT brake kit, pm me

11-07-2009, 01:39 PM	#12
gregor_42 Focus Enthusiast Join Date: Oct 2007 FF Member#: 51089 Location: Portage, WI What I Drive: 2004 Sonic Blue SVT Posts: 328 FF Reputation: 1 Buy-Sell-Trade Rating: (0)	I have 215/40/17 right now and have had no problems so far. I would recommend watching out for the larger holes and bumps tho. I hit a big hole the other day and felt like my whole wheel fell off lol __________________ "And with due respect to the Mustang Cobra, we think this car [the SVT focus] also adds up as the best thing the SVT consortium has done to date." - Car and Driver

11-03-2009, 01:43 PM	#3
cconley Focus Enthusiast Join Date: Nov 2006 FF Member#: 40920 Location: Des Moines, Iowa What I Drive: 2004 Sonic Blue Focus SVT w/EAP Posts: 133 FF Reputation: 1 Buy-Sell-Trade Rating: (0)	Thanks for your 2 cents. I see you're a flight instructor... me too! Where did you go to school? I'm a UND grad. Teaching (privately) in central Iowa. Of topic, sry. Other question is will sportlines cause rubbing on an SVT?

11-03-2009, 03:19 PM	#4
dirtbrown Custom User Title Join Date: Oct 2006 FF Member#: 40563 Location: Riverside What I Drive: SVT EAP Posts: 4,783 FF Reputation: 19 Buy-Sell-Trade Rating: (2)	you should be fine with that tire size....why do you want the smaller sidewall?? even a 215/45 should fine with sportlines

11-03-2009, 07:01 PM	#8
cconley Focus Enthusiast Join Date: Nov 2006 FF Member#: 40920 Location: Des Moines, Iowa What I Drive: 2004 Sonic Blue Focus SVT w/EAP Posts: 133 FF Reputation: 1 Buy-Sell-Trade Rating: (0)	The new tires look much better. I think the drop from the sportlines will "make the car". I'll post a couple of pics of the new tires tomorrow. The dunlops that were on the car when I bought it looked good, but when I bought the neogens they just looked too big so I decided to downsize.

11-06-2009, 01:24 PM	#11
myfafp3 Focus Addict Join Date: Oct 2008 FF Member#: 59725 Location: Ontario, CA What I Drive: 2000 Cloud9 SE C-DAN Posts: 1,156 FF Reputation: 3 Buy-Sell-Trade Rating: (2)	I agree with mlb and dirtbrown. I had sportlines on mine with svt wheels and 215/45-17 tires for about a year with no problems. I even went with a 225/45-17 in the rear on the same wheels and didn't rub. Posted via FF Mobile

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