After countless hours of riding my Snowshoe ''3XL'' 5.6's at 0-1psi, I noticed that the side knobs on the rear nondrive side were starting to separate from the casing, with one knob actually gone.
As far as I know, these are two of only three such tires in existence, so I didn't feel like watching them fall apart.
I have used superglue and Shoe Goo to repair tires since the first time I laid my hands on the Goo back in Utah in the mid 90s.
Having only used the clear Goo, I had decent results, but it tended not to last to long, sort of flaked off after a while. First I did a test with super glue only, but that did not last more than a few minutes, as the side knobs see a lot of stress and would start to shear. I realized that I needed to smooth/minimize the stress riser at the interface.
Enter black Shoe Goo.
I first used super glue to secure the edge of the knobs that were starting to separate and then covered with black Shoe Goo to reduce the shear stresses at the knob/sidewall interface.
This worked like gold, as we say over on these Nordic shores.
Did the fix last weekend and have by now 20 hours + at 0-2psi riding on them, and the knobs are staying right where the boys at Vee put them.
Very, very relieved, as these tires are pretty much irreplaceable.
The secret is, as far as I can tell, that the black Shoe Goo has a more liquid like consistency than the clear version and it seems to stick much better to rubber than the clear stuff.
Could probably be used to reinforce sidewalls that are starting to show a lot of cord as well.
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Thread: Black Shoe Goo for tire repairs.