Rotating tires at 21k miles

[delacruz.c5d]

My 1969 Cadillac was 5300 pounds dry, most of it on the front (factory screw-up, double-wall box frame from a convertible on a coupe). My old jack (purchased in 1980) had no problem with it. I recently bought a jack with a higher rating, but I do not think my older jack would have issue. What’s your current jack rated at?

I'll lodge this under "They don't build them like they used to..." Because of the need for efficiency gains in the last few decades, cars now tend to be lighter than they were 40+ years ago. But then again, those cars are built like a brick s__t house. They also got like, what...15 mpg?

I have (or had...I think I got rid of one) two jacks. One was a heavy duty-ish jack, and I "think" that was rated for 5K#s. I think that one is no longer with me, as it was unnecessary (at the time). I do have a aluminum racing jack, but I'm pretty sure that's only rated for 2 tons.

None the less, and this is just me...I want no business of jacking/jack standing a 5K# vehicle. Call me a weenie...don't care. I would love to be able to do something like this on my own, but if it just costs me less than $50 to have someone rotate tires...fine by me.

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[delacruz.c5d]

My 1969 Cadillac was 5300 pounds dry, most of it on the front (factory screw-up, double-wall box frame from a convertible on a coupe).

Also, thank goodness they don't make 'em like this anymore. Jeez...wrong frame install on a car?! I know that the big 3 back in the day used to do this stuff all the time. It does sound like car production has evolved well over the last 40+ years.

Now, if they could only get more semiconductors...

 

[HuntingPudel]

Also, thank goodness they don't make 'em like this anymore. Jeez...wrong frame install on a car?! I know that the big 3 back in the day used to do this stuff all the time. It does sound like car production has evolved well over the last 40+ years.

Now, if they could only get more semiconductors...

Heh, it made the body stiffer. I was actually thinking of pulling a frame off a wrecked convertible until I had the chance to crawl under a coupe and see the frame was different on that Coupe’s from mine. Mine was an early production car, special-ordered. I suppose GM wanted to make their delivery window on it and had a frame that “fit” (convertible was the same chassis, just double walled instead of single- Cadillac used fully boxed frames where all the other divisions used C-section frames on coupes and single-wall box frames on convertibles because the small Cadillac was bigger than the other divisions’ “big cars”).

 

[SnBGC]

Time flies.
A little over 43,000 miles now and tires measure just slightly over 5/32" at all four corners. Apparently rotating tires doesn't really matter that much in this car? This set has only been rotated the one time (at 21k miles). I will run them down to 4/32" and then get a new set.
Anyone know what these tires were rated for initially? 50k miles? Going to be close....

 

[Kamuelaflyer]

Time flies.
A little over 43,000 miles now and tires measure just slightly over 5/32" at all four corners. Apparently rotating tires doesn't really matter that much in this car? This set has only been rotated the one time (at 21k miles). I will run them down to 4/32" and then get a new set.
Anyone know what these tires were rated for initially? 50k miles? Going to be close....

I think you’re doing good with those tires Greg. A neighbor runs a chain of tire shops here and tells me that BEVs tend to average 25% to 33% faster wear on tires than an icemobile.

 

[SnBGC]

I think you’re doing good with those tires Greg. A neighbor runs a chain of tire shops here and tells me that BEVs tend to average 25% to 33% faster wear on tires than an icemobile.

I have made an adjustment to my driving style. The OEM set on my Focus Electric only lasted 30k miles while my niece with the very same car achieved 50k miles. It is very easy to punish the tires on a BEV compared to an ICE so I would agree with your neighbor.

 

[SnBGC]

The driving style change mentioned above is probably why I am seeing higher estimated range figures compared to last year around this time. Pretty warm today....feels like 105F or so....

 

[sukhoi_584th]

@SnBGC how wide is the cross-bar for your jack? I'm thinking of getting a 3 ft piece of 2" x 3" x 0.25" rectangle tube steel and gluing pucks on each end to use as a cross-bar for my jack. I'm mostly wondering if 3 ft is wide enough to keep the MME happy, and from your pics it looks like it will be. Only about $90 shipped https://www.onlinemetals.com/en/buy...rectangle-tube-a500-a513-hot-rolled/pid/10175 Per https://www.roguefab.com/tube-calculator/ I'd only be about halfway to the yield point with a 3000 lb load.

@Fat Mach I'm in the exact same boat regarding a new jack. What did you end up buying? My old Craftsman 3 ton works for the MME but I need to get a new jack for my '19 GT350. It'd be nice for the same jack to work for both vehicles so I can just get rid of the Craftsman when it dies. I've narrowed it down to the cheapo Chinese Arcan/JEGS 3 ton low-profile and the Norco 71233A 2 ton. I can't decide if it's worth paying 2x and going down to 2 ton to get a "better" jack, and after reading the first post in this thread now I'm worried the 2 ton is too small for the MME. I'm annoyingly limited on the length of the jack itself with the space in my garage and can't go with any of the 30+ inch frames that are typical for 3 ton low-profile. Currently leaning toward the Arcan/JEGS.

 

[Fat Mach]

@sukhoi_584th I still haven't bought a jack yet.

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