245/60/14 on stock rally wheels
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Go Mango
Never enough beer...
I'm curious as to what you've got on the back of Ol Yeller in your profile picture.
ir3333
Well-Known Member
215R7014 front and rear
front wheels are 14 x 5 1\2 small bolt
Rear wheels are 14 x 6 small bolt
I call her "Plain Jane"
front wheels are 14 x 5 1\2 small bolt
Rear wheels are 14 x 6 small bolt
I call her "Plain Jane"
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Go Mango - having run 245-60-14s on stock rallye wheels for a long time and having done what it takes to put those same tires on 7 inch wheels (yeah they really do have more traction) I hope you are ready to do what's needed to make that work. I couldn't fit 7 inch wheels without moving the springs in with one of the kits that move the front hanger against the frame. That means cutting off the perches on the housing and welding in new ones - moving them in. It's a lot of work. figuring out offset in the limited wheel well is also a challenge. Would I do it again? you bet - in fact I'm building a 70 Dart GT right now and already have done that deed again. And will I run my 318 Swinger with 245-60-14s on stock Rallyes another 40,000 miles - you bet!
pishta
I know I'm right....
sure it will fit...these do too! But does it make it safe?
I looked for some wide 14's and gave up. Just picked up some 15 SBP's...in 8.
I looked for some wide 14's and gave up. Just picked up some 15 SBP's...in 8.
daves66valiant
68 Dart 340/727:66 Signet Vert 340/5spd: 68 D100
With the correct offset no prob.
Your sayin they will work without rubbing the cragars i have?
daves66valiant
68 Dart 340/727:66 Signet Vert 340/5spd: 68 D100
Depends on the backspacing. 4.25”-4.75” should be okay. There is a really good old Thread on here that goes over all kinds of setups. It’s the only Sticky in this forum section. At the top of your page. Post your tire combo.
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Go Mango
Never enough beer...
You see, it's like Dave said. It's all about back spacing. Too much ribs the lip on your quarters. Too little and it's the leaf springs.
I have 15x7" (4.25 backspace) on the rear of my Swinger with 255-60's. They're tight on the fender lip on one side but because of the lift and stiffness of my springs I don't get any rubbing.
mopower440
Well-Known Member
Thats whats on mine. I would LOVE to run it on a 7" wide wheel...if i had one with the small bolt pattern.. still watchin the for sale ads for a decent small bolt set that affordable..
I currently have 235 60 14 on 14x5.5 rallye's and while there is no issue with tread wear, the sidewall bulge is too much for my complete comfort, as illustrated above. I believe mine is actually worse.
However, on the rear, I have 255 60 15 on 15x6.5 an even though it's the same amount of "overage", those wheels and tires look like they were meant to be that way.
However, on the rear, I have 255 60 15 on 15x6.5 an even though it's the same amount of "overage", those wheels and tires look like they were meant to be that way.
Bringing this back from the dead, I have finally decided on tire sizes for Vixen. I plan on 205 70 14 on the front and 245 60 14 on the rear. 6" on the front and 7s on the rear. They are only about .3" different in height with the 245s being taller.
I know, old thread..................
But isn't it the opposite? Trying to understand. Would little backspace not put you further away from the springs and vice versa?
I have been using 245-60-14s on my 3 1970 Darts for 30 years. One of them uses stock 5.5 inch rallye rims with an unaltered rear suspension. perhaps 70,000 miles this way and 3 sets of BFG TA radials. Never had any issues, despite the howling of some folks here that my demise is imminent.
The other 2 Darts use 14x7 inch aftermarket rallyes out back that have the additional 1.5 inches of rim in the inside of the rim. I wanted the rims to look the same from the outside front to back. This was only possible by using a 3/4 inch spring relocation kit. Mine were both Mopar Performance kits although there are other versions out there. Again no issues despite many tens of thousands of miles on one of the cars (this one too ran 245-60-14s on stock rims with stock leaf location for over a decade and many many miles before the conversion).
The tires are tight in both set ups - I wouldn't do this if I were doing handling competitions.
By the way, I also use 205-70-14s up front as they are the closest 70 series in terms of sidewall height. I have never had fitment issues, but tried 215s and had to do some front fender adjustments (front lip strut).
The other 2 Darts use 14x7 inch aftermarket rallyes out back that have the additional 1.5 inches of rim in the inside of the rim. I wanted the rims to look the same from the outside front to back. This was only possible by using a 3/4 inch spring relocation kit. Mine were both Mopar Performance kits although there are other versions out there. Again no issues despite many tens of thousands of miles on one of the cars (this one too ran 245-60-14s on stock rims with stock leaf location for over a decade and many many miles before the conversion).
The tires are tight in both set ups - I wouldn't do this if I were doing handling competitions.
By the way, I also use 205-70-14s up front as they are the closest 70 series in terms of sidewall height. I have never had fitment issues, but tried 215s and had to do some front fender adjustments (front lip strut).
Yes, you’re correct. Too much backspacing puts the tires on the springs, too little puts the tires into the quarters.
Lol. No one said you'd die, now who's being overly dramatic? Cramming a 245/60/14 on a 5.5" rim is just stupid. Can you do it? Sure. It will distort the tread, so you'll have to run less air pressure to get a proper contact patch. And the stretch you put on the sidewalls paired with the lower tire pressures will result in absolutely lousy handling. Maximizing handling performance means running the widest recommended rim for a given tire, not the narrowest.
Clearly though no one that cares about handling would run a 245/60/14 BFG T/A. Those big floppy sidewalls, on that narrow of a rim, would handle like absolute crap.
But they should fit easily on a '70+ Dart regardless of how you're using it, no spring offset should be necessary at all if the wheel specs are good. At the section those 245's only 9.8" wide, and a '70 Dart should have a good 11" from spring to uncut quarter lip (both of my '71's do). Which is plenty of room for a 245 with proper backspacing. Heck @toolmanmike runs 255's on his.
The only reason to run a 245/60/14 on a 14x5.5" rim is because you're too cheap to do it right, and still want to brag that you've got a 245 on there. Even though it won't perform anywhere near a 245 with a proper width rim. All show, no go.
But really this isn't news, there's nothing high performance about a 245/60/14 anyway.
Wow, I think I could have written that for you having heard this same hogwash dozens of times... 
michiganpat
Well-Known Member
FWIW, the 215/70's I have on my 14x5.5's feel like about the max sidewall bulge I feel comfortable with....section width is 3" wider than the rim....the rule of thumb I've always heard is max section width approx 1.4x rim width, granted that varies with aspect ratio, and that ROT is what I heard in the early 90's, back when most tires were 60-75 aspect ratio. you can get away with a bigger discrepancy with a taller aspect ratio. LT31x10.5-15's (10.5" section width, essentially a 76 aspect ratio) will fit comfortably on a 7" rim (recommended rim size 7-9"), whereas a 265/45R20 (10.5" section width) has a recommended rim width of 8.5-10"....you're probably OK going with a rim 1/2" narrower than the minimum recommended, I wouldn't go more than that.
Just pointing out one detail. The factory small bolt rallye wheels are 5.5 wide. The repops made in recent years are 6 inches wide. As a matter of fact I've never seen a repop that was less than 6 inches.
michiganpat
Well-Known Member
with a 6" wide rim, 215-225 is probably the widest I'd go with a 60 series tire, personally....235 maybe with a 70 series
33IMP
Well-Known Member
I'm not sure if we are speaking the same "language" here.
Too much backspace moves the tire too close to the leaf springs.
Too little backspace moves the tire too close to the fender
Too much backspace (imo) is ideal, you can put the tire exactly where you want it with spacers (GOOD quality ones, billet, not that cast fits-everything crap).
Too little backspace, all you can do is buy smaller tires.
I have rims with bs so bad, I can't get a tire wide enough for the rim width under my car!
33IMP
Well-Known Member
I have run tires that are too big for the rims
I have run tires that were too SMALL for the rims.
Neither is ideal. Neither has ever caused me a problem.
But I wouldn't run 14"wheels on anything now.
I have run tires that were too SMALL for the rims.
Neither is ideal. Neither has ever caused me a problem.
But I wouldn't run 14"wheels on anything now.
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