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  #1  
Old 12-05-2013, 08:44 PM
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Tire Fitment

I know that 225/45R17 tires are a good option in place of the 225/50R16's Speedometer reads almost identical.

I was asked whether a 235/45R17 or 245/45R17 tires would work. Something about wanting to fill up the wheel openings a little more.

Has anyone done it or has suggestions or advice? Here are the calculations

Using OEM 225/50R16 tires, and your speedo reads 65 mph...

225/45R17 tires will read 65.3 mph
235/45R17 tires will read 66.23 mph
245/45R17 tires will read 67.15 mph











Attached Images
File Type: jpg 225.jpg (106.3 KB, 409 views)
File Type: jpg 235.jpg (125.5 KB, 412 views)
File Type: jpg 245.jpg (124.8 KB, 410 views)
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JFICX8659TH100216.....Date of Manufacture: November 16, 1995.....
Fuji Heavy Industries..Ōta North Plant....Ōta City,. Gunma Prefecture, Japan

In-Service Date: January 2, 1997



"The Pristine Green Polo Machine”
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R.I.P. 2010 Subaru Outback Limited 2.5 CVT...338,000 miles. Totaled by a 1,300 lb. COW March 4, 2016

2014 Hyundai Avante Limited ...178,000 miles. Actually quieter and smoother than the Outback

2007 Mazda Miata MX-5 PRHT...102,000 miles.
Plenty of parts, service and windshields.


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  #2  
Old 12-05-2013, 09:32 PM
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Re: Tire Fitment

John,
I have had 245/45/17s on the Claret for quite a while now.
But its a 4.44 so with the gear advantage I'm not worried about hurting the transmission.
On my white XT6, the day I installed taller tires the lock up TQ blew out.
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Last edited by svxfiles; 12-07-2013 at 11:01 AM. Reason: Misspelled up?!
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  #3  
Old 12-06-2013, 05:17 AM
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Re: Tire Fitment

One thing I would do is take the car for a spin with a GPS speedo (smartphone app) onboard and see just how far out the car's speedo is. My SVX reads faster than true speed, so a taller tire would actually make my gauge more accurate.
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Last edited by Crazy_pilot; 12-06-2013 at 07:09 AM.
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  #4  
Old 12-06-2013, 06:57 AM
Tireiron Tireiron is offline
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Re: Tire Fitment

A larger diameter tire makes the speedometer read slower, not faster, at the same true speed.
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  #5  
Old 12-06-2013, 07:08 AM
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Re: Tire Fitment

Sorry, I misspoke. My speedo reads faster that I'm actually going. 100 KPH on the gauge is around 93 on GPS.
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  #6  
Old 12-06-2013, 07:47 AM
dragoontwo dragoontwo is offline
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Re: Tire Fitment

Don't forget to also compare them against the '97 tire size of 215/55R16. Then the 235/45R17 is almost identical. I run 235/45R17 and the speedometer is pretty dead on with the GPS.
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  #7  
Old 12-06-2013, 09:46 AM
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Re: Tire Fitment

Quote:
Originally Posted by dragoontwo View Post
Don't forget to also compare them against the '97 tire size of 215/55R16. Then the 235/45R17 is almost identical. I run 235/45R17 and the speedometer is pretty dead on with the GPS.


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File Type: jpg new comparison.jpg (146.4 KB, 351 views)

Last edited by svxcess; 12-07-2013 at 12:05 PM.
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  #8  
Old 12-06-2013, 04:11 PM
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Re: Tire Fitment

Maybe I missed it but, how accurate is the SVX speedometer to start with?
Gene
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  #9  
Old 12-06-2013, 04:13 PM
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Re: Tire Fitment

Quote:
Originally Posted by bwb3 View Post
Maybe I missed it but, how accurate is the SVX speedometer to start with?
Gene
uSUALLY IT READS ABOUT 3MPH HIGHER THAN ACTUAL SPEED ON A STOCK svx AT 65 MPH, IN MY EXPERIENCE.





What is a "cap lock?"


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  #10  
Old 12-06-2013, 04:27 PM
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Re: Tire Fitment

If I understand this interweb stuff right, cap lock means you are an Angry Bird.

Gene
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  #11  
Old 12-06-2013, 04:45 PM
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Re: Tire Fitment

Quote:
Originally Posted by bwb3 View Post
If I understand this interweb stuff right, cap lock means you are an Angry Bird.

Gene
That sounds logical.
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The first SuperCharged SVX,
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the first equal length headers,
the first phenolic spacers,
the first Class Glass fiberglass hood,
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Fiberglass Hood thread
My locker
4.44 Swap link
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  #12  
Old 12-07-2013, 10:50 AM
dragoontwo dragoontwo is offline
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Re: Tire Fitment

Nothing to see here I guess
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Last edited by dragoontwo; 12-11-2013 at 05:32 AM.
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  #13  
Old 12-07-2013, 12:09 PM
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Re: Tire Fitment

Sorry about that,dragon. I edited my original post and put in the 235/45R17 tire. Just delete your latest post and the confusion will be gone.

0.1mph difference at 120 and 2/100" of a difference in tire diameter is as perfect as you can get between these 2 tires.
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1996 Polo Green LSi #216..138,100 miles...SOLD

JFICX8659TH100216.....Date of Manufacture: November 16, 1995.....
Fuji Heavy Industries..Ōta North Plant....Ōta City,. Gunma Prefecture, Japan

In-Service Date: January 2, 1997



"The Pristine Green Polo Machine”
First Polo Green on the Network
First Clear front turn signals, JDM Alcyone hood emblem, rear panel, and BOXER engine cover on the Network (US) (2000)
First 5000K HID factory fog lights (2007)
First SVX JDM BBS wheels on a USDM SVX (2013)

HID lighting (5000K) for headlight and H3 fog lights, PIAA SuperExtreme 120W high beams, rebuilt EG33 longblock, Cometic head gaskets, Phase II flexplate, AMR aluminum radiator with custom silicone hoses, 160A high-output alternator in aluminum-ceramic coated case, new design alternator wiring upgrade v.4, rare factory headlight protectors, refinished JDM BBS mesh aluminum wheels and custom, polished billet aluminum new hex center caps, LED grille mod, R1 Concepts high-carbon cryo slotted rotors, Akebono ceramic pads, Goodridge S/S braided brake lines, Smallcar Stage 1 shift kit, ThermalTech aluminum/ceramic-coated valve covers, Energy Suspension urethane front & rear swaybar bushings, Bontrager22 rear swaybar with QS Components Chromoly Teflon/Kevlar endlinks, "$15.00/5 minute" suspension mod. Hella Supertone horns, Custom stainless steel exhaust system with 2" headpipes, Magnaflow cats, AeroTurbine AR25 resonator /AWD "Bullet" muffler.


R.I.P. 2010 Subaru Outback Limited 2.5 CVT...338,000 miles. Totaled by a 1,300 lb. COW March 4, 2016

2014 Hyundai Avante Limited ...178,000 miles. Actually quieter and smoother than the Outback

2007 Mazda Miata MX-5 PRHT...102,000 miles.
Plenty of parts, service and windshields.


4th Registered Network member —2/21/2001

My NEW locker..I...My Email..I..Wikipedia/SVX .

.

Last edited by svxcess; 12-07-2013 at 12:12 PM.
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  #14  
Old 12-07-2013, 02:53 PM
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Re: Tire Fitment

235/45/17 is really close or 245/40/17. The width of the 245 makes up for the shortened height.
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  #15  
Old 12-12-2013, 09:34 AM
92snowmachine 92snowmachine is offline
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Re: Tire Fitment

with my 225/45R18 summer tires the speedo is dead on. with the stock size winter tires the speedo reads slightly high.
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