When the cord shows through the tread...they are done.
Start getting lots of flats through the thin tread...they are done.
Crappy looking sidewalls...unless the structure of the casing is
damaged...I keep going.

I generally get quite a few years out of a pair of tires and try and
extract every cent of useful life from them...probably to a fault.

Angus "who is not yet convinced that all 'cracks' in the sidewalls are
all bad"

On Jan 3, 2:24 pm, Michael Shaljian <mikeshalj...@gmail.com> wrote:
> I've had a set of Jack Browns on my Quickbeam since getting it in May
> '09, and I've probably got near 2500 miles on them. They seem to ride
> just fine, but I'm wondering what I should be looking for to know if
> the tread is worn out. I'm 180 lbs., for what it's worth, and I assume
> these should have a max lifespan of about 3000 miles?
>
> If the original 'checkerboard tread' has been worn down to totally
> smooth, are they worn out? Or are they basically fine until all tread
> is gone? As expensive as good tires are I'm not eager to change sooner
> than necessary, but I do have a set of Schwalbes waiting that I'd like
> to try out, maybe just to mix up my riding with new rubber?

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