Some tire help please

PsnSnake_19 · January 28th, 2012, 01:50 PM

Hey guys my rear tires are going out and i wanted to buy some mickey thompson street radials 305/35/18. So my question is will my car look lower with bigger tires?? and also i wanted to know what size 18's should i run in the front?? 245's??? 225's? any upsides or downsides?? then i plan on buying new wheels but thats a different story lol

gdl · January 28th, 2012, 07:32 PM

I like this tire size calculator because it lets you easily compare tire sizes.

Tire size calculator

According to this, the 305/35/18 is .7 inch taller than a stock 245/45/17 so from the side you're not going to notice a huge difference. You will need 10 inch wide rims to run the 305s, not sure what you have currently. This will alter your overall gearing slightly as well.

Also according to that calculator, a 245/40/18 is the same height as our stock 245/45/17. A 255/40/18 would probably be a better pairing with the 305/35 in the back because it's .3 inch taller than stock and gets you a little closer to matching that 305.

PsnSnake_19 · January 28th, 2012, 07:35 PM

Originally Posted by gdl

I like this tire size calculator because it lets you easily compare tire sizes.

Tire size calculator

According to this, the 305/35/18 is .7 inch taller than a stock 245/45/17 so from the side you're not going to notice a huge difference. You will need 10 inch wide rims to run the 305s, not sure what you have currently. This will alter your overall gearing slightly as well.

Also according to that calculator, a 245/40/18 is the same height as our stock 245/45/17. A 255/40/18 would probably be a better pairing with the 305/35 in the back because it's .3 inch taller than stock and gets you a little closer to matching that 305.

so i should get 255 for the front and 305 in the back?? what about ppl running skinnys why cant i run 225's in the front for less weight

gdl · January 28th, 2012, 11:26 PM

Sorry, didn't realize that's what you were after. The issue is that if you get too big a discrepancy in tire height front-to-back, the ABS and traction control will get out of whack. If you go skinnies, you still want to try to match the tire height as close as possible. Either that or permanently disable the ABS and TC. A 225/45/18 on like a six or seven inch wide rim would be appropriate and would save a little weight.

Now having said all that, I've never done the big/little combo myself so I'm no expert at it. Hopefully someone who has will chime in.

PsnSnake_19 · January 29th, 2012, 09:59 AM

Thanks man yea i plan to buy 18's all around i just dont see no point in having bigger then 245 in the front since i never really autocross i just go to the drag strip and don't car much for handling even though my car handles good

Calogero6685 · January 29th, 2012, 10:47 AM

On a New Edge, I'd keep 17s so I can fit a taller tire. 17s and lowered look great.

PsnSnake_19 · January 29th, 2012, 11:11 AM

yea well upside to 17's are ALSO mickey et streets are only $235 in that size instead if it being $295 wit 18's lol

January 28th, 2012, 01:50 PM	#1
PsnSnake_19 Hardcore Enthusiast 2001 cobra Join Date: Aug 2010 Location: tampa Posts: 2,251 iTrader: 0 reviews	Some tire help please Hey guys my rear tires are going out and i wanted to buy some mickey thompson street radials 305/35/18. So my question is will my car look lower with bigger tires?? and also i wanted to know what size 18's should i run in the front?? 245's??? 225's? any upsides or downsides?? then i plan on buying new wheels but thats a different story lol __________________ SVT all day! Next mods: Mickey thompson street radials, new wheels, gears and tuner, then turboed by 2013

January 28th, 2012, 07:32 PM	#2
gdl Regular 99 Cobra, 03 Mach1, 07 CS Join Date: Oct 2008 Location: Grapevine, TX Posts: 372 iTrader: 0 reviews	I like this tire size calculator because it lets you easily compare tire sizes. Tire size calculator According to this, the 305/35/18 is .7 inch taller than a stock 245/45/17 so from the side you're not going to notice a huge difference. You will need 10 inch wide rims to run the 305s, not sure what you have currently. This will alter your overall gearing slightly as well. Also according to that calculator, a 245/40/18 is the same height as our stock 245/45/17. A 255/40/18 would probably be a better pairing with the 305/35 in the back because it's .3 inch taller than stock and gets you a little closer to matching that 305. __________________ 2007 Redfire California Special http://i183.photobucket.com/albums/x...n/2007GTCS.jpg 2003 Dark Shadow Grey Mach 1 http://i183.photobucket.com/albums/x...born/Mach1.jpg 1999 Black Cobra Vert

January 28th, 2012, 11:26 PM	#4
gdl Regular 99 Cobra, 03 Mach1, 07 CS Join Date: Oct 2008 Location: Grapevine, TX Posts: 372 iTrader: 0 reviews	Sorry, didn't realize that's what you were after. The issue is that if you get too big a discrepancy in tire height front-to-back, the ABS and traction control will get out of whack. If you go skinnies, you still want to try to match the tire height as close as possible. Either that or permanently disable the ABS and TC. A 225/45/18 on like a six or seven inch wide rim would be appropriate and would save a little weight. Now having said all that, I've never done the big/little combo myself so I'm no expert at it. Hopefully someone who has will chime in. __________________ 2007 Redfire California Special http://i183.photobucket.com/albums/x...n/2007GTCS.jpg 2003 Dark Shadow Grey Mach 1 http://i183.photobucket.com/albums/x...born/Mach1.jpg 1999 Black Cobra Vert

January 29th, 2012, 09:59 AM	#5
PsnSnake_19 Hardcore Enthusiast 2001 cobra Join Date: Aug 2010 Location: tampa Posts: 2,251 iTrader: 0 reviews	Thanks man yea i plan to buy 18's all around i just dont see no point in having bigger then 245 in the front since i never really autocross i just go to the drag strip and don't car much for handling even though my car handles good __________________ SVT all day! Next mods: Mickey thompson street radials, new wheels, gears and tuner, then turboed by 2013

January 29th, 2012, 11:11 AM	#7
PsnSnake_19 Hardcore Enthusiast 2001 cobra Join Date: Aug 2010 Location: tampa Posts: 2,251 iTrader: 0 reviews	yea well upside to 17's are ALSO mickey et streets are only $235 in that size instead if it being $295 wit 18's lol __________________ SVT all day! Next mods: Mickey thompson street radials, new wheels, gears and tuner, then turboed by 2013

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