Back tires wearing quickly

Man, it's just one thing after another! While I was working on my tail light, I noticed that both of my back tires, which only have 3,000 miles on them, are wearing quickly on the insides. Both tires are wearing this way, but the front ones look fine. Is this common?

Thanks,
Brian

Sounds like your tire pressure in back is way too low. I think it is good to run at least 4 lbs more rear than front. Personally I run about 28 front, 32 back and my tires seem to be wearing fine.

Sounds like you have negative camber. You can try and raise the spring plates, but this'll also affect you ride height.

Hi,
the adverse tire wear (due to negative camber)is much worse on swing axle cars than on the later/automatic IRS rear suspensions.
The only way to combat negative camber on a swing axle car is to increase the ride height.
Cheers
Nick

Don't worry Brian; it's normal. The ones in my swingaxle car are also wearing inside due to negative camber; who cares when the car looks way cool riding low in the back right?

Brian -

My Speedster experiences 'negative camber' everytime I plop my fat ass into the car.

Peace - Out!

Yelp ride height is one way to combat this kind of wear.

But the rear alinement is the best thing to have checked.

The axle ends on a swing axle car can be slid forward a little to comemsate for wear.

The trailing arms are sloted just for this reason. There should be factory punch marks on the arms that show as a referance.

A alinement shop uses them when they check old bugs with rear wheel problems, then adjust acordingly.

But don't take my word , Go ask a alinement specialest.
If your happy with your ride height . just check the alinment

I feel your pain, Brian........... I freaked out when I noticed the same thing on my rear tires at 3200 miles. Imeadiatly, I reported to an old German mechanic with my perceived problem. He told me to rotate 'em and chill out....
He also mentioned that only the later year swing axles were built with the negative camber.. Perhaps this is why my '74 chasis seems to "stick" to the road way better than the earlier models I have owned.

Actually, Ernie, after '69 swingaxles were no more, at least in Germany and the US (Mexico and Brazil used swingaxles until their end of production). That's when the IRS (independent rear suspension) started so those problems were minimized. I've also read advice about not rotating your tires on swingaxle cars; if I remember correctly it's on John Muir's "idiot" book.