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#1
02-28-2005, 09:08 AM
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Originally posted in Street section...
Hey there, I have some aftermarket "Centerline" type wheels made my Modern (inside rim says Ultimate Wheel Co. but I can't find them on the Web); see link in sig for a pic. I'd like to get some wider replacement BFG T/A's and I'm wondering if the following sizes will fit... Current: Front: P235/60R14 14x7 Rear: P235/60R15 15x7 or 8 (nearest I can tell they are 15x8's) Back Spacing (measured per this guide): Front: 4" Rear: 3.5" BFG's I want to purchase: Front: P245/60R14 Rear: 255/60R15 or P275/60R15s if they'll fit. Per the BFG T/A Tire Sizes chart: P245/60R14 or 15 fits 7.0 - 8.5" rims P255/60R15 fits 7.0 - 9.0" rims (No P255 for 14's) P275/60R15 fits 7.5 - 9.5" rims It looks like P245's for the front will fit on my 14x7 rim, but with a 4" backspacing will I have any issues with rubbing? Likewise, if I have 15x8's, it also look like P275's for the rear will fit on the 15x8 rim, but with a 3.5" backspacing will I have any issues rubbing? If it turns out I have 15x7's in the rear and/or P275's are too wide, I'd still like to go with the P255's if possible. Thanks for any advice!  Jim.
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* '69 Custom S - 2dr Hardtop Coupe - Rust-free Oregon survivor with all original panels and original trunk floor * Engine alive and kickin' March 2nd, '06  * RA-IV 'spec' 400 (.060-over = 410ci), balanced, Comp Cams #9794041, #16 heads (72cc converted to large valve) with 1.65 Harland Sharp Rollers * QuadraJet #7042210, HEI, Hurst V-Gate, FlowTech Headers, X-Pipe with dumps, Flowmasters, TH-350, 3.90 Posi * Best ET: 14.06 - Bandimere Speedway, CO. @ 5,800+' |
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#2
02-28-2005, 09:08 AM
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Originally posted in Street section...
Hey there, I have some aftermarket "Centerline" type wheels made my Modern (inside rim says Ultimate Wheel Co. but I can't find them on the Web); see link in sig for a pic. I'd like to get some wider replacement BFG T/A's and I'm wondering if the following sizes will fit... Current: Front: P235/60R14 14x7 Rear: P235/60R15 15x7 or 8 (nearest I can tell they are 15x8's) Back Spacing (measured per this guide): Front: 4" Rear: 3.5" BFG's I want to purchase: Front: P245/60R14 Rear: 255/60R15 or P275/60R15s if they'll fit. Per the BFG T/A Tire Sizes chart: P245/60R14 or 15 fits 7.0 - 8.5" rims P255/60R15 fits 7.0 - 9.0" rims (No P255 for 14's) P275/60R15 fits 7.5 - 9.5" rims It looks like P245's for the front will fit on my 14x7 rim, but with a 4" backspacing will I have any issues with rubbing? Likewise, if I have 15x8's, it also look like P275's for the rear will fit on the 15x8 rim, but with a 3.5" backspacing will I have any issues rubbing? If it turns out I have 15x7's in the rear and/or P275's are too wide, I'd still like to go with the P255's if possible. Thanks for any advice! Jim.
__________________
* '69 Custom S - 2dr Hardtop Coupe - Rust-free Oregon survivor with all original panels and original trunk floor * Engine alive and kickin' March 2nd, '06 * RA-IV 'spec' 400 (.060-over = 410ci), balanced, Comp Cams #9794041, #16 heads (72cc converted to large valve) with 1.65 Harland Sharp Rollers * QuadraJet #7042210, HEI, Hurst V-Gate, FlowTech Headers, X-Pipe with dumps, Flowmasters, TH-350, 3.90 Posi * Best ET: 14.06 - Bandimere Speedway, CO. @ 5,800+' |
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#3
03-02-2005, 04:26 AM
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Jim,
I think that you are going to be really tight in both front and rear. The vehicle came stock with 4.5 inches backspace. With 4 inch backspace on the front with an 8 inch tread width you will be doing some scrubbing. On the back you only have 3.5 inches of backspacing on a tire that is 11 inches wide on the tread. I don't think that you will be able to get the tire under the wheel opening. B-Man has some really wide 17" tires on his Tempest and I believe that he has either used 4.5 ot 5 inch backspacing. I really think that you are going to be unhappy with this set up. Good luck
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http://www.geocities.com/jims64gto |
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#4
03-02-2005, 09:04 AM
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Thanks lil64. I measured my front P235's and they are 9.25" from the inside "bulge" to the outside. My conversion calculator confirms this when I go from mm to inches:
235mm = 9.25" 245mm = 9.65" (.4" wider than my P235's) 255mm = 10.04" (.79' wider) 265mm = 10.43" 275mm = 10.83" 285mm = 11.22" 295mm = 11.61 255's are just a tad over 10" wide in the rear while 275's are approaching 11". Since the 245's are less than 1/2" wider than what I'm running now, I'm thinkin' they'll work for the front with a 4" BS? Yeah, 275's may be pushing it for the rear. However, the 255's are only little over 3/4" wider. Plus, both you and B-man have '64's and I have a '69. Wouldn't all of this make a difference? Thanks! Jim.
__________________
* '69 Custom S - 2dr Hardtop Coupe - Rust-free Oregon survivor with all original panels and original trunk floor * Engine alive and kickin' March 2nd, '06 * RA-IV 'spec' 400 (.060-over = 410ci), balanced, Comp Cams #9794041, #16 heads (72cc converted to large valve) with 1.65 Harland Sharp Rollers * QuadraJet #7042210, HEI, Hurst V-Gate, FlowTech Headers, X-Pipe with dumps, Flowmasters, TH-350, 3.90 Posi * Best ET: 14.06 - Bandimere Speedway, CO. @ 5,800+' |
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