My thought is that your observations make perfect sense. 3000km (1850miles) and third season is just about when one would expect to have "filed away" a lot of information. That frees up mental space for other, more detailed, observations. You are likely also picking up the pace a bit and that exposes tire performance, good or bad. Get some new tires.
In my opinion, using up bad tires is like sitting through the rest of a bad comedy show just because you paid a $5 cover charge.
I’m certainly riding a bit more aggressively now that it’s “broken in” but still on the conservative side. I’ve mostly noticed the issues riding on 50km/hr roads, not in the twisties which makes me wonder.
I agree with your comedy show analogy and don’t have any issue spending the $$$ on new rubber IF that’s the issue. I certainly value safety above all else so if upgrading the rubber solves my lack of confidence I’m feeling right now, it’s money well spent as far as I’m concerned.
I just didn’t want to spend the money if the existing tires perhaps aren’t the issue and the problem lies elsewhere being that they might be adequate and still have life in them.
As far as new rubber goes for an upgrade, this a solid choice?
Bridgestone Battlax BT46’s
Rear 140/70/18 (67H)
Front 110/80/18 (58V)
Assuming I’m ok to re-use existing tubes, ya?