18" tire sizes

4.6stanger · 02-10-2008, 11:58 AM

Hey guys my tires are still somewhat good, but my next pair of rears im wanting something a lil bigger. Im running Sumi's 285/35-18s in the rear on some 18x10 fr500s. Well my question is anybody runnin 40 series tires, any pics? Are they too fat. Im thinkin of 305-315/ 35-40- 18s. LMK ya'lls opinions Pics would def. help thanx alot guys.

BlackSunshine01 · 02-10-2008, 05:14 PM

all a 40 series tire would do is make your rear taller. the second number in the tire size is your side wall height. its a percentage of your overall tire with(ex.285) so your new side wall would be 40% of 285mm instead of 35%. i have heard that when you go to a 315 you have to roll the fender lip. so i would imagine a 315/40/18 might require a mini tub. could be completely wrong though.

01FR500 · 02-10-2008, 09:50 PM

You won't have to roll the fender lip with a 315 tire, it will fit without modifiction but may be too wide for a 10'' rim. 315s are pretty fat on a 10.5'' rim. Depending on the manufacturers specs 305 is usually about as wide as recomended.

Dave04Mustang · 02-14-2008, 11:32 PM

315/30/18

egomez24 · 02-16-2008, 10:42 AM

My brother is running a 295/35/zr18 BFG kdw on his 03 Saleen. Freakin thing looks sweeet!!!!!!!!

Currently Available Prices and Sizes

MustangGTRound2 · 02-20-2008, 12:19 AM

295 35 18 KDW BFG on mine below...

kansas02GT · 04-03-2008, 11:10 AM

i know this is an older thread, but what about front sizes on a 99-04 GT? i am looking at some real fr500's (18x9 all around), but the tires that come with them from 5.0resto are 265/35/18. are these appropriate or should i get the 275/XX/18??

it is not lowered yet, but i am planning on doing so. please respong with any input/pics ASAP as im planning on doing this this weekend.

thanks

04Roush2 · 04-03-2008, 11:25 AM

Go with 265/35/18. That's what I got on the fronts. This pic was last summer. The car now has KDW's but they're the same size as the ones in this pic.

kansas02GT · 04-03-2008, 11:29 AM

i wasnt sure about rubbing for the larger size, or if the tires would be wide enough to cover the rim and not look like i was trying to be a cheap-o. Any pics from the rear?

04Roush2 · 04-03-2008, 11:31 AM

I have 295's on the rear

kansas02GT · 04-03-2008, 11:37 AM

o. you have the roush suspension and all? i am looking to get the eibach prokit (1") to at least drop it a bit.....or should i go a little lower??...dont want to do struts and all just yet.

04Roush2 · 04-03-2008, 11:49 AM

Yeah I have the Roush Stage 2 suspension. Never had another type of suspension so I wouldn't be able to tell you the difference.

seco · 04-03-2008, 12:19 PM

I'm running 275/35/18's front on saleen 18x9 with Eibach Pro Kit - no rub

02-10-2008, 11:58 AM	#1
4.6stanger Three-hundredths of a second away from it!!!! Join Date: Apr 2007 Location: Lufkin, Texas Posts: 2,296 Trader Rating: (2)	18" tire sizes Hey guys my tires are still somewhat good, but my next pair of rears im wanting something a lil bigger. Im running Sumi's 285/35-18s in the rear on some 18x10 fr500s. Well my question is anybody runnin 40 series tires, any pics? Are they too fat. Im thinkin of 305-315/ 35-40- 18s. LMK ya'lls opinions Pics would def. help thanx alot guys. __________________ 2002 Mustang GT-K&N FIPK, Accufab Plenum/ 75mm T-body, Diablosport Predator, 4.10s, Pro 5.0 shifter, Bassani O/r x-pipe, Magnaflow Magnapacks, Steeda pulleys, Mickey Thompson ET streets, Moser axles, Eibach Sportlines, Hotchkis U/Lca's, 180* t-stat_ best e.t 13.02@103!!!!

02-10-2008, 05:14 PM	#2
BlackSunshine01 Registered User Join Date: Jan 2008 Location: north east s.a. Posts: 291 Trader Rating: (0)	all a 40 series tire would do is make your rear taller. the second number in the tire size is your side wall height. its a percentage of your overall tire with(ex.285) so your new side wall would be 40% of 285mm instead of 35%. i have heard that when you go to a 315 you have to roll the fender lip. so i would imagine a 315/40/18 might require a mini tub. could be completely wrong though. __________________ who needs the after market? lowerd 01 GT. Last edited by BlackSunshine01; 02-10-2008 at 05:19 PM.

02-10-2008, 09:50 PM	#3
01FR500 Still Learning Join Date: Dec 2007 Location: Texarkana, TX Posts: 1 Trader Rating: (0)	You won't have to roll the fender lip with a 315 tire, it will fit without modifiction but may be too wide for a 10'' rim. 315s are pretty fat on a 10.5'' rim. Depending on the manufacturers specs 305 is usually about as wide as recomended. __________________ 2003 GT H&R SuperSports l Tokico Illumina dampers l Maximum Motorsports c/c plates l MM XL SFCs l JLT RAI l other goodies...

02-14-2008, 11:32 PM	#4
Dave04Mustang Registered User Join Date: Nov 2007 Location: Austin/San Marcos Posts: 42 Trader Rating: (0)	315/30/18 Attached Thumbnails __________________ Last edited by Dave04Mustang; 02-14-2008 at 11:37 PM.

02-16-2008, 10:42 AM	#5
egomez24 Novi 22 Join Date: May 2007 Location: San Antonio Posts: 362 Trader Rating: (1)	My brother is running a 295/35/zr18 BFG kdw on his 03 Saleen. Freakin thing looks sweeet!!!!!!!! Currently Available Prices and Sizes __________________ 06 Roush Novi 2k ARH LT ARH Catted Xpipe Magnaflows 355 Gears 492rwhp/420rwtq Last edited by egomez24; 02-16-2008 at 10:44 AM.

02-20-2008, 12:19 AM	#6
MustangGTRound2 2002 Mustang GT 5 Speed Join Date: Feb 2008 Location: Livingston tx Posts: 53 Trader Rating: (0)	295 35 18 KDW BFG on mine below... __________________ 2002 Mustang GT 5 speed Dark Red..... a.k.a. my second chance....

04-03-2008, 11:10 AM	#7
kansas02GT Registered User Join Date: Oct 2005 Location: katy (houston) Posts: 73 Trader Rating: (0)	i know this is an older thread, but what about front sizes on a 99-04 GT? i am looking at some real fr500's (18x9 all around), but the tires that come with them from 5.0resto are 265/35/18. are these appropriate or should i get the 275/XX/18?? it is not lowered yet, but i am planning on doing so. please respong with any input/pics ASAP as im planning on doing this this weekend. thanks __________________

04-03-2008, 11:29 AM	#9
kansas02GT Registered User Join Date: Oct 2005 Location: katy (houston) Posts: 73 Trader Rating: (0)	i wasnt sure about rubbing for the larger size, or if the tires would be wide enough to cover the rim and not look like i was trying to be a cheap-o. Any pics from the rear? __________________

04-03-2008, 11:37 AM	#11
kansas02GT Registered User Join Date: Oct 2005 Location: katy (houston) Posts: 73 Trader Rating: (0)	o. you have the roush suspension and all? i am looking to get the eibach prokit (1") to at least drop it a bit.....or should i go a little lower??...dont want to do struts and all just yet. __________________

04-03-2008, 12:19 PM	#13
seco oLD sCHooL fOOL Join Date: Apr 2005 Location: TEXAS Posts: 855 Trader Rating: (0)	I'm running 275/35/18's front on saleen 18x9 with Eibach Pro Kit - no rub __________________ March under-drive pulleys, RAM H/D clutch, TriAx, Pro5.0 handle, BBK plenum, 75mm PP t/body, C&L True Flow polished pipe, SVT focus fuel pump, UPR O/R X, 2 chambered Flows, Ford Racing gears 4.10's, Eibach Pro Kit, energy suspension spring isolators, NT555 285/40/18s (rear), 18x9 18x10s chrome Saleens, and a shit load of interior,exterior cosmetic upgrades... Last edited by seco; 04-03-2008 at 12:24 PM.

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