I removed the TCK80 from the front of my bike yesterday. It had a very hard life and was completely goosed.

The wear on it was very odd indeed and compared to the new tyre, all of the blocks were much larger on the old tyre! The tyre was also much wider at the tread.

Cornering with the old tyre was a nightmare, you had to apply a little counter steer to get it to lean (as normal) but then turn into the corner to get the bike round, very unsettling, like riding an off-road knobbly on the road.

Removing the tyre was the easiest ever, the bead broke by hand, and I used 1 tyre lever to get the bead over the rim, then pulled the tyre off the wheel, again by hand. The sidewalls had no stiffness in them at all, I've seen MTB tyres with more strength.

Looking at the tyre, you can press every block of the remaining tread right inside the carcase of the tyre. It's very bizzare, I've never seen a tyre go bad like this.

When I put the tyre back on the bike, I had to raise the front of the bike further off the ground, so despite there only being 5mm difference in tread depth, the old tyre had 'squashed' meaning the difference in radius was around 30mm.

Having said all that. The old tyre had done god-knows how many very hard miles on the trails of potrugal, sometimes at speeds of 60-70mph. but the degridation was very strange.

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Never underestimate the power of stupid people in large groups.