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#1
10-30-2023, 08:09 PM
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Will 15x7 Rally IIs with 245s fit up front on a '69 Tempest?
I currently have Centerline wheels all around on my '69 Custom S:
Front: 14x7 or 8 with BFG 245-60-R14 Rear: 15x8 with BFG 275-60-R15 Slicks: Rally II with MT ET Street 255-60-R15 I want bring the car back to a more original look and have managed to find four 15x7 Rally IIs at a local junkyard from a '73 Grand Prix. I've restored previous junkyard Rally IIs which I use for my slicks and they came out nice. In a separate post people shared that a 275 will fit in the rear with 15x7 Rally IIs, so I should be good there. I'd like to use the 15x7s up front as well to help fill in the wheel well and make the car look a bit lower. I'm wondering what the maximum tire size is that I can fit up front using a 15x7 Rally II? All four rims should have 4.00" backspacing. I'd like to use new 15" 245s (like I have now on the 14x8s), but I doubt they will fit? Will a 235 or even a 225 15x7 fit without clearance issues? If not, would going down to a 50 series tire be an option and still have a somewhat wider tire? Then I'm wondering how the car will look with 50 series up front and 60 series in the rear?  Does anyone have any side view examples of that you can share?Thanks for any advice!
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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+' Last edited by tremo; 10-30-2023 at 08:55 PM. |
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#2
10-30-2023, 09:38 PM
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225 and 235 will fit. I've run 235's on my 70's and 71's for decades.
245 may rub a touch at lock. 
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Eric "Todd" Mitten '74 Bonneville 4dr Sedan (455/TH400/2.93 open) '72 LeMans GT (455/M-13/3.23 [8.5"] posi) '71 GTO Hardtop (400/TH400/3.07 12 bolt posi) ‘71 GTO Convertible (455HO/TH400/3.23 posi) '67 GTO Coupe (455/ST-10/2.93 posi) '67 Tempest Wagon (428/TH400/2.56 posi) Deuteronomy 8:3 
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#3
10-30-2023, 10:44 PM
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Up front the 68/9 will not handle as big a wheel/tire combo as 70/2s. The kickout at the lower rear of the wheel opening is the culprit, from what I recall.
Check the wheel/tire combo sticky in the suspension section, I believe this is covered in there to some degree.
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costs too much |
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#4
10-31-2023, 01:02 AM
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I had 245/60 x 15 on my 68. 15 x 7 GP Rally IIs.
Had to notch the lower front about 1/2" to avoid rubbing when turning. One of my younger bonehead moves.
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Ed 1968 GTO (Thanks Mom) 2006 Silverado 2007 Cadillac SRX 2015 Chevy Express  
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#5
10-31-2023, 10:59 AM
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Definitely stick to 235/60-15s up front.
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
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#6
10-31-2023, 02:04 PM
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Thanks all! So I guess the rim size being 1" taller is not really the issue? Rather it's the width of the tire that causes the rubbing.
I've already compensated for the tire width on my 14x7's when I installed the 245s by moving the rocker panel side of the front fender back ~1/2". The front part of the fender already cleared by ~1/2". As such, I may be able to use 245s on the 15x7s?!
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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+' Last edited by tremo; 10-31-2023 at 02:20 PM. |
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