I tried searching and couldn't find a thread that specifically addressed this. Basically, I've come across a great deal on some used 6.70-15 WWW bias-plys and would like to replace the 235/75/15 Mastercraft skinny white radials on my '49 Caddy sedanette. Has anyone run a tire this small on a big ol' Caddy? I've got mine lowered approximately 3" and, even though they don't rub, I can't even get the current rears off or on without deflating them first.
A quick search shows the 6.70 - 15 at 27.5" tall and the 235 - 15 29" tall. I would measure the height of your existing tires, then look at the 6.70 tires and measure them. I found when I was employed in the tire industry, you could take 2 different brand tires with the same size labeled on the casings, they would be different height. The only real way to match them were to physically measure or stand them side by side for reference. And for this reason, I take the internet search for a general guide and not fact.
Gotta' agree 6:70's on your Caddy would be way too small and look like your running 4 temporary spares
A bargain is no bargain if you can't use it. (without a compromise) As others above have said, the 6.70-15 is undersized for you Caddy, no matter minor manufacturer variances in given sizes. One other consideration is load capacity. However, as always, your car, your choice. Ray
I'm pretty sure that Caddy came with 8.20-15's. That was the size of choice for the rears on our hot rod Fords if we were lucky enough to be able to afford 15" wheels.
Although you don't specify what MODEL Cadillac, the tire size commonly shown for the 1949 Cadillac is a 7:50 x 15 tire. 6:70 x 15 will look small, will have a lesser load rating and will handle poorly.
Nope, 8.20 was stock for all the standard road cars (series 61, 62 and 60S) in '49. The Fleetwood 75 (limo) and the series 86 commercial vehicles were still based on the pre-war body and had 16" wheels with 7.50-16. Regardless, I think everyone is confirming what I suspected anyway - 6.70 is just too small for this car.
YOU are more correct than I. The 7:50 x 16 was used on the 49-75. Others used the 8:20 x 15, See chart below from owners manual. Recommended Tire Pressures No. Pressure Series Tire Size Plies Front Rear 49-61 8:20 x 15 4 24 lbs. 24 lbs. 49-62 8:20 x 15 4 24 lbs. 24 lbs. 49-60S 8:20 x 15 4 24 lbs. 24 lbs. 49-75 7:50 x 16 6 24 lbs. 32 lbs. 49-86 (Commercial Chassis) 7:50 x 16 6 34 lbs. 36 lbs.
Nothing smaller than 7.60 would look or drive right. Cadillacs need the best quality tire you can afford. The 6.00 - 6.50 - 7.00 - 7.50 numbering sequence disappeared on 15'' pass. car tires somewhere around '48 to '50, but is still in use on 16'' pass. & truck sizes. The 15'' 6.70 - 7.10 - 7.60 - 8.00 - 8.20 number group is in place by 1950.
49_Caddy, that's the problem with lowering a car... Please post up a pic of your '49...I too have one only mine is a '48 sedanet...would like to see yours... Thanx, R-
first hit is Coker 4 ply rating with a 1550 load rating at max pressure. https://www.summitracing.com/parts/cok-57700/overview/
I don't always get the best response to pics of my car here on the HAMB, because of the crusty factor - but I like it
Nothing wrong with the 'krusty factor" IMHO...if they don't like it they can simply go to the next post... I sure do like it,all it needs are some wide whitewalls...FWIW, I have a good '48 rear bumper (no rust-thru) -I see yours has rust holes...I'd part with it for $200 plus the cost of shipping if you are interested... R-
Have you tried to jack the car up, with a hydraulic floor jack, on the frame rail, just in front of the rear wheel ? BY doing so, you are stretching out the axle, from the frame and car body, thereby creating more tire clearance between the axle and the fender. I have a '51 Chevy, with reverse rims, which puts the sidewall of the tire very close to the flange of the wheel opening. The above is the only way I can slide the tire / rim out, without deflating the tire. It works for me, otherwise, I would be deflating the tire, as well.
Ewwwwwwwwwww! Krusty! I've got 2 buddy's with '49 sedanettes and both of them are body-worked to death before being gloss painted. They'd quiver if they saw your car...lol
Wow ! nice Cad ... some gold '56 Sabre wheels, inchwalls, & paint the wheel wells red. Selling the sunbonnet would pay for everything.
Yeah, I have to go through that with the deflated tire! The Cadillac fender comes pretty low over the tire, you add 3" spring blocks and a tire that's significantly wider than stock and it just don't work.
I had 8.20's on my 51 Cadillac hardtop and they looked a bit hefty. The standard size was 8.00 X 15. I have 7.60 X 15's on my 56 Fairlane, which is smaller that your 49 Cadillac, and it looks anemic.
I agree with 302 GMC. Buy the best you can afford and Master Crafts IMO are not them. Their only good for rolling your car in to or around the shop. Sent from my SM-T377V using The H.A.M.B. mobile app
Hi ..... I have 49 Caddy.... I run 7.20-15 BF Goodrich ....rides good..steers well ... I'm happy them...different maintenance manuals give different sizes to suit 49 Cadillac...
Pay for everything? I've got 4 Sabre wheels that cost me a $1000 and was quoted $ 750 each to re chrome and there are only a few people who have the correct equipment to do the job properly.
6.70's were on Chevys and fords which were lighter than Caddies. I would think that's not enough tire for that car. Might look and drive bad. Your car , buy them mount them up and look. If they don't look right and you got a great deal on them . You should be able to pass that deal on to someone else.
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