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#1 |
Registered Member
Join Date: Mar 2001
Location: Wilmington, DE
Posts: 13
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![]() Stock size is 245/45/17. Will I have any problems jumping to a 255/45/17?
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'98 Cobra Convertible - Triple Black Bassani X-Pipe with cats Magnaflow Cat-back Ford 3.73 Gears B&M Pro-Ripper Densecharger |
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#2 |
Guest
Posts: n/a
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![]() my friend has that size on his 99 gt , I gave him my old pony 17 that came on my gt and he is very un happpy with that size of tire !!
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#3 |
Registered Member
Join Date: Mar 2000
Location: Rio Rancho, NM
Posts: 32
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![]() You won't have any problems with the width, but your height will increase .65" over stock, which may create some rubbing problems in the front, but I'm not sure.
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2001 Mineral Grey Cobra - #2277 of 3867 - MM SFC's, Bilsteins, Rear: H&R race springs, PHP IRS brace, Steeda IRS bushings, Front: MM Coilover conversion w/ Hypercoils - JBA Headers, Bassani X-pipe, Dynomax Ultra-Flow catback - Procharger P-1SC Stage II |
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#4 |
Mustang Addict
Join Date: Jan 2001
Location: McKinney, TX
Posts: 1,294
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![]() Actually, the height of the tire only increases by less than 0.2" (I think it's the circumference that increases by .6"). Both the width and the height should be fine.
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Strike down the unroadworthy! 2000 GT Atl. Blue: '03 Cobra motor - 465rwhp/473rwtq, T-56 6-speed, full MM TA/PH & tubular K-member suspension, Saleen body, 17" Torq-Thrust II's, M/T ET Street radials, and lots more '94 Rio Red Cobra: All the bolt-ons, 3.73s |
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#5 |
Registered Member
Join Date: Mar 2000
Location: Rio Rancho, NM
Posts: 32
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![]() My bad, I miscalculated.... here are the actuals:
Stock Diameter = [245 (.45) (2)] + [17 (25.4)] = 652.3mm New Diameter = [255 (.45) (2)] + [17 (25.4)] = 661.3mm So, 661.3 - 652.3 = 9mm/25.4mm = .35" difference in tire height New circumference would be 3.14 (661.3) = 2076.5mm Old circumference is 3.14 (652.3) = 2048.2 So, 2076.5 - 2048.2 = 28.3mm/25.4 = 1.1" difference in circumference Whew, been a while since i took geometry ![]()
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2001 Mineral Grey Cobra - #2277 of 3867 - MM SFC's, Bilsteins, Rear: H&R race springs, PHP IRS brace, Steeda IRS bushings, Front: MM Coilover conversion w/ Hypercoils - JBA Headers, Bassani X-pipe, Dynomax Ultra-Flow catback - Procharger P-1SC Stage II |
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#6 |
Mustang Addict
Join Date: Jan 2001
Location: McKinney, TX
Posts: 1,294
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![]() I guess I need to correct myself also - the amount of space between the tire and fenderwell would change by less than 0.2" (half of your 0.35" difference in overall height), not the tire height.
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Strike down the unroadworthy! 2000 GT Atl. Blue: '03 Cobra motor - 465rwhp/473rwtq, T-56 6-speed, full MM TA/PH & tubular K-member suspension, Saleen body, 17" Torq-Thrust II's, M/T ET Street radials, and lots more '94 Rio Red Cobra: All the bolt-ons, 3.73s |
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#7 |
Registered Member
Join Date: Mar 2001
Location: Wilmington, DE
Posts: 13
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![]() Thanks all. 255/45/17 BFG G-Force KDW's will be installed tomorrow!
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'98 Cobra Convertible - Triple Black Bassani X-Pipe with cats Magnaflow Cat-back Ford 3.73 Gears B&M Pro-Ripper Densecharger |
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#8 |
Registered Member
Join Date: Apr 1999
Location: Hayes, Va, USA
Posts: 798
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![]() 245/45R17 BFG KDW O.D. = 25.7 inches
255/45r17 BFG KDW O.D. = 26.1 inches
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2002 5M GT (99% stock) 1991 5M LX (30% stock) patiently awaiting my satin silver 07 Mach 1, and don't forget the shaker |
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#9 |
GRNSNAK
Join Date: Jun 2002
Location: Slidell Louisiana
Posts: 65
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![]() I got 17x8 cobra wheels with 245/45 on the front and 275/40 on the back. With 2" lowering springs the back rub a little on extreme bumps (like speed bumps at 30mph). Front rub slightly during hard cornering, thats why i didnt go with 255s. The 275/40s put my speedo off by 5mph. So without getting all technical, you shouldnt have a problem making the jump...
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1997 Cobra SVT & 2012 Shelby GT500 |
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