NEED HELP FAST GOING TO GET TIRES TODAY

joey50gt · 05-07-2001, 02:43 PM

will a 245/50 tire rub if so what about a 245/45???
thanks for any help.

jimberg · 05-07-2001, 03:18 PM

It all depends on the wheels and your suspension? Can you give more details? I have Cobra R replica rims from Speedware. 17x9s with 245/45zr17s. I have Steeda springs that lowered my car about 2". My tires rubbed front and rear when going over bumps. I don't think I would have had a problem if I wasn't lowered, though.

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351W 89 Mustang GT Convertible

joey50gt · 05-07-2001, 03:29 PM

i have stock pony rims and my car is not lowered at all

jimberg · 05-07-2001, 04:26 PM

Okay, if 245 is the width you're after, I don't think you'll have problems. All cars are different though. Make sure that the aspect ratio will get you the correct height tire.

For example:

Stock '89 gts have 225/60-15s. I needed to go to 17x9" rims and I wanted a width of 245. Figure height with the following formula:

( Width * Aspect Ratio ) / 1270 + Wheel Size = Tire Height

( 225 * 60 ) / 1270 + 15 = 25.62

Now that you have tire height, plug it into the following formula to determine aspect ratio using new wheel:

(1270 * ( Old Tire Height - New Rim Size)) / New Tire Width = Aspect Ratio

(1270 * ( 25.62 - 17 )) / 245 = 44.68.

45 is the closest, so I picked 245/45ZR17s.

------------------
351W 89 Mustang GT Convertible

[This message has been edited by jimberg (edited 05-07-2001).]

blue00gt · 05-07-2001, 05:10 PM

I have 245/50/15's on 15x8 Weld Draglites on my 79 Pace Car which is lowered about 1.5" in the back and have had no problems.

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2000GT Atlantic Blue: Cobra R Wheels-17x9 255/40/17, 17x10.5 315/35/17, tubular K-member & control arms, Tokico 5-ways, coil overs, sway bars, strut/shock tower bars, 70mm FMS throttle body, Saleen nose.
79 Pace Car: Maximum Motorsports suspension - H&R Race springs, Bilsteins, rear control arms, chassis bracing, Draglites, 302 w/ Edelbrock Performer intake, cam and 600cfm carb, BBK equal-lengths & H-pipe, 2.5" Flowmaster 2chmbr exhaust, Al Driveshaft, 8.8 trak-loc, TCI C4 w/ 2000 stall, B&M

Dark_5.0 · 05-07-2001, 10:09 PM

I have 245/50 16's on my pony rims on my 88 gt vert they dont rub and look better than the skinny 225 good luck

I strongly recommend the nitto drag radial for the rear

------------------
88 mustang gt convertible BBk equal length headers mac cold air intake cowl hood nitto drag radials ford racing clutch flow masters h-pipe 180 degree thermostat 16 degrees of timing

05-07-2001, 02:43 PM	#1
joey50gt Registered Member Join Date: Jan 2001 Location: hurst,texas,america Posts: 95	NEED HELP FAST GOING TO GET TIRES TODAY will a 245/50 tire rub if so what about a 245/45??? thanks for any help.

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05-07-2001, 03:18 PM	#2
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	It all depends on the wheels and your suspension? Can you give more details? I have Cobra R replica rims from Speedware. 17x9s with 245/45zr17s. I have Steeda springs that lowered my car about 2". My tires rubbed front and rear when going over bumps. I don't think I would have had a problem if I wasn't lowered, though. ------------------ 351W 89 Mustang GT Convertible

05-07-2001, 03:29 PM	#3
joey50gt Registered Member Join Date: Jan 2001 Location: hurst,texas,america Posts: 95	i have stock pony rims and my car is not lowered at all

05-07-2001, 04:26 PM	#4
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	Okay, if 245 is the width you're after, I don't think you'll have problems. All cars are different though. Make sure that the aspect ratio will get you the correct height tire. For example: Stock '89 gts have 225/60-15s. I needed to go to 17x9" rims and I wanted a width of 245. Figure height with the following formula: ( Width * Aspect Ratio ) / 1270 + Wheel Size = Tire Height ( 225 * 60 ) / 1270 + 15 = 25.62 Now that you have tire height, plug it into the following formula to determine aspect ratio using new wheel: (1270 * ( Old Tire Height - New Rim Size)) / New Tire Width = Aspect Ratio (1270 * ( 25.62 - 17 )) / 245 = 44.68. 45 is the closest, so I picked 245/45ZR17s. ------------------ 351W 89 Mustang GT Convertible [This message has been edited by jimberg (edited 05-07-2001).]

05-07-2001, 05:10 PM	#5
blue00gt Mustang Addict Join Date: Jan 2001 Location: McKinney, TX Posts: 1,294	I have 245/50/15's on 15x8 Weld Draglites on my 79 Pace Car which is lowered about 1.5" in the back and have had no problems. ------------------ 2000GT Atlantic Blue: Cobra R Wheels-17x9 255/40/17, 17x10.5 315/35/17, tubular K-member & control arms, Tokico 5-ways, coil overs, sway bars, strut/shock tower bars, 70mm FMS throttle body, Saleen nose. 79 Pace Car: Maximum Motorsports suspension - H&R Race springs, Bilsteins, rear control arms, chassis bracing, Draglites, 302 w/ Edelbrock Performer intake, cam and 600cfm carb, BBK equal-lengths & H-pipe, 2.5" Flowmaster 2chmbr exhaust, Al Driveshaft, 8.8 trak-loc, TCI C4 w/ 2000 stall, B&M

05-07-2001, 10:09 PM	#6
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	I have 245/50 16's on my pony rims on my 88 gt vert they dont rub and look better than the skinny 225 good luck I strongly recommend the nitto drag radial for the rear ------------------ 88 mustang gt convertible BBk equal length headers mac cold air intake cowl hood nitto drag radials ford racing clutch flow masters h-pipe 180 degree thermostat 16 degrees of timing