Tire Overall Diameter limitations per TIA for MY04-07 STIs

AP1toGDRev.G · 07-12-2008, 12:00 AM

I attended a 3 day course TIA course this week... Tire Industry Association - TIA

They recommend to not run tires on your vehicle that are 3% larger OR smaller in overall diameter. So, when replacing your wheels and/or tires on MY04-07 STIs (OEM RE070 overall diameter = 24.9") you do NOT want to run a tire that is smaller than 24.2" or larger than 25.7" in overall diameter, when rounding to the nearest tenth.

However, I believe SOA does not recommend changing the overall diameter period... but they also stuck me w/ a sh!t tune so F-<K em, IMO.

Just a heads up for when you are searching for tires. I also want to apologize for this thread... Why do you run a 245/40ZR18 or bigger?

Oh, and I run a 245/40ZR18 RT-615 w/ a OD of 25.6 and I love em but I would really like to go w/ a 265/35. FWIW.

<-- Slanging rubber for the past six years.

boxer_four · 07-13-2008, 04:56 PM

This isn't church...you can't sling 'rules' around and expect people to take them at face value.

You should probably explain WHY the TIA doesn't want people deviating more than 3%

mond12345 · 07-13-2008, 06:00 PM

Maybe it has something to do with a braking distance increase?? I'm sure we could put a list together very quickly not to go over 3% and another for 3% and over.

token-negro · 07-14-2008, 06:36 AM

Quote:

Originally Posted by boxer_four

This isn't church...you can't sling 'rules' around and expect people to take them at face value.

Now thats funny^

***snorky*** · 07-14-2008, 07:21 AM

It most likely has to do with odometer readings and not safety. Please elaborate OP.

07-12-2008, 12:00 AM	#1
AP1toGDRev.G Professional STI Racer Car: 07 UGM STi Fav Mod: Aux cord & Nitrogen in tires Location: San Diego & Temecula Posts: 615 Join Date: Apr 2007 Trader Rating: (0)	Tire Overall Diameter limitations per TIA for MY04-07 STIs I attended a 3 day course TIA course this week... Tire Industry Association - TIA They recommend to not run tires on your vehicle that are 3% larger OR smaller in overall diameter. So, when replacing your wheels and/or tires on MY04-07 STIs (OEM RE070 overall diameter = 24.9") you do NOT want to run a tire that is smaller than 24.2" or larger than 25.7" in overall diameter, when rounding to the nearest tenth. However, I believe SOA does not recommend changing the overall diameter period... but they also stuck me w/ a sh!t tune so F-<K em, IMO. Just a heads up for when you are searching for tires. I also want to apologize for this thread... Why do you run a 245/40ZR18 or bigger? Oh, and I run a 245/40ZR18 RT-615 w/ a OD of 25.6 and I love em but I would really like to go w/ a 265/35. FWIW. <-- Slanging rubber for the past six years. This ad is not endorsed by this member. Please register or login to hide this ad.

07-13-2008, 04:56 PM	#2
boxer_four Junior STI Driver Fav Mod: KONI+Swift+Zzyzx=Win Posts: 185 Join Date: Jul 2007 Trader Rating: (1)	Re: Tire Overall Diameter limitations per TIA for MY04-07 STIs This isn't church...you can't sling 'rules' around and expect people to take them at face value. You should probably explain WHY the TIA doesn't want people deviating more than 3%

07-13-2008, 06:00 PM	#3
mond12345 Junior STI Driver Car: 2007 WR Blue STi Fav Mod: COBB! Location: PA Posts: 55 Join Date: Mar 2008 Trader Rating: (0)	Re: Tire Overall Diameter limitations per TIA for MY04-07 STIs Maybe it has something to do with a braking distance increase?? I'm sure we could put a list together very quickly not to go over 3% and another for 3% and over.

07-14-2008, 07:21 AM	#5
*snorky* Teh Other White Meat Car: 32J GDFDYEH Fav Mod: Fullerton's Qrack on my car Location: Chicagoland Posts: 3,615 Join Date: Apr 2006 Trader Rating: (22)	Re: Tire Overall Diameter limitations per TIA for MY04-07 STIs It most likely has to do with odometer readings and not safety. Please elaborate OP. This ad is not endorsed by this member. Please register or login to hide this ad.