If the tyre is worn down to the groove (see red arrow)
is it time for the skip, seems like still a bit of tread but that groove has gone?
Didnt last very long. 🙁
Would you change it?
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If they cause you to crash constantly get shot.. but if they're still working why change.
save it for summer ?
No. And Yes.
[zx spectrum basic]
10 when the front tyre tread loses its sharp edges remove it.
20 replace front tyre with a new 60a tyre.
30 put the worn front tyre on the rear.
40 bin the old rear tyre.
50 goto 10.
[/zx spectrum basic]
unless it's for racing DH.
I keep 'em and use them on the back in summer till they're pretty much bald.
For some reason then I still can't bring myself to chuck them out, so I have a mini stash of completely useless rollers...