Excelsior Radial Tires

[steve s]

oops

[Dave in MN]

Originally Posted by steve s

...... Tire wear in the photo looks like an alignment issue........

Denis,
Looks like camber problem to me. What else are you seeing?

Dave,
Did your friend have the same problem irrespective of where the tires were mounted on the car?

Steve[/QUOTE]


I just spoke to him on the phone for the third time in two days to clarify and gather more info:
The worst bald spot showed up when the tires were on the rear of the car. The replacement tire he received from Coker has only been run on the front and it is developing the same flat spot at between 5-6000 miles.
Coker suggests that these tires be run at the maximum rated tire pressure of 44#. The tires with the bald spots are being run at 35#. The owner said that if he would run these tires at 44#: "It would shake the car to pieces".
Obviously this owner drives his car often and far; he as put on about 19K miles over the past 3 summers.
Good Day!

[steve s]

Originally Posted by Dave in MN

Denis,
Looks like camber problem to me. What else are you seeing?

Dave,
Did your friend have the same problem irrespective of where the tires were mounted on the car?

Steve

I just spoke to him on the phone for the third time in two days to clarify and gather more info:
The worst bald spot showed up when the tires were on the rear of the car. The replacement tire he received from Coker has only been run on the front and it is developing the same flat spot at between 5-6000 miles.
Coker suggests that these tires be run at the maximum rated tire pressure of 44#. The tires with the bald spots are being run at 35#. The owner said that if he would run these tires at 44#: "It would shake the car to pieces".
Obviously this owner drives his car often and far; he as put on about 19K miles over the past 3 summers.
Good Day![/QUOTE]

That's an important clue: the smaller tires would require more air pressure, but I'm surprised they would recommend teh maximum! Not a lot of margin of error or for occasional heavy loads.

DOes not sound like an alignment issue.

[Synchro909]

Originally Posted by steve s

Is your friend using the 500R or the 550R?

His were 5.00RX19 tyres. They all ended up showing this uneven wear pattern, even the rear ones. From reports here, it seems his experience is not uncommon. I wonder if the manufacturer has improved the product. I'm now inclined to go with 16 inch wheels rather than use these.

[steve s]

All of the bad reports are for the 500R19, and all reports for 550R19 have been good--I think.

[CarlG]

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I have had no problems with my 550R19's. Close to 10K miles on them now.

[Dave in MN]

Originally Posted by steve s

All of the bad reports are for the 500R19, and all reports for 550R19 have been good--I think.

I agree. Good Day!

[Synchro909]

Seems Excelsior need to bring quality up to scratch on the 5.00 X 19 tyres!

[Benson]

Maybe the mold used to make the 500-19 is defective and the depth of the bottom of the tread varies so it appears that the tire is wearing unevenly?

Maybe some measurements of distance from center of tires to bottom of tread on tires with little or moderate wear are in order?

Additional changes made to original post.

[wensum]

I have Excelsior 5.00 19s on my Speedster and when fitted required relocating on the rim and in one case quite a lot of balance weights to get them properly balanced.
However, I have had no problems since and the improvement to the steering is simply wonderful!