What is the F1 bed outside panel to panel?


The factory rims what was the specs on the wheels?


I'm trying to order some wheels and tires for my build. I'm not running fenders and would like the tires about 2" off the side of the bed. I was going to chaulk up a outline on the garage floor of the bed. Center the cab, center the rear end and measure what backspace I would at least need.

 

Do these charts help with the bed side question?




On the wheel question, the stock F-1 wheel is Ford 8C 1015, which is a K-H product having their number 31283. It is 16" x 4.5" wide, 5 lug x 5.5" pattern, has .620" of positive center disc offset, a 3.42" center bore, and an 8.092" hub cap mounting circle inside diameter. Stu

 

Awesome, thank you. So the rims use a 3.88 back spacing (4.5/2=2.25+0.620=2.87)

 

Not seeing where you got the 3.88". The backspace calculation includes the rear lip which adds 1/2". So 4.5"/2 = 2.25" + .620" +.50" = 3.37" backspace. Chart below. Of equal or greater importance here is the section width of your selected tires. The F-1 could be optioned with either 6.00-16" or 6.50-16" bias ply tires. Maximum section width for those sizes are 6.55" and 6.90" respectively when mounted on the 4 1/2" K profile stock rim. My reference for those numbers is the 1958 Tire and Rim Association Annual. If you mount radials I'd expect somewhat wider numbers. Stu

 

Hey Stu, I'm running fender less or will be at least and going to use a 295 or maybe a 315 tire. Need to be able to put the 700 Ft-lbs down to the ground.

I got it because the rims are 4.5 inches wide that would include the lip.

 

Rim width is always measured across the inner rim base, not across the lips. However you measure, a 295 or 315 mm wide tire is too much for that rim width. Depending on which profile series you intend to use (55, 60, 65, 70, 75, etc) you need more than twice that width. For instance, an LT315/70R16" tire is designed to fit a 9.50" wide rim. Stu

 

It honestly depends on the manufacture. Volk and Buddy Club for example still use (or at least they did at one point) include the lips.

Yes I'm aware a 295-315 will not fit on a 4.5". What I'm to figure out is the backspacing I need, with the rear end I have (65.25 mounting flange to mounting flange). By knowing the stock configuration I can do a better calculation on what rim will and what clearance I have between the tire and bed.

 

Okay, good luck with it. Stu

 

Thanks for the help Stu, greatly appericate the info you provided!

 

Stu, Thanks for that useful chart. I've got a problem similar to the OP's with my '52 F1. I've had '90 F-150 (7 inch) wheels on mine with 235-75R15 tires since about 1991, with no problems. Then, about 5 years ago I replaced the tires with 265-75R15's and all seemed good until I tried hauling home a load of gravel for the driveway. The tires rubbed the box (both sides) when loaded. I'm looking at a set of used Cooper 'mud grip' tires and believe they may have even a wider cross-section than my current ones - need to find the specs for them on-line, if I can. I've been measuring a set of 15x8" rims I have on hand that have about 5/8" less positive offset than the F-150 rims. Hope to mount one of the Cooper tires tomorrow to see if they will work on the 8" rims and clear the box OK. I appreciate your helpful comments. - Bob