Yeah, HX. They are 'Stretch Proof' though as you mentioned (I have found they do stretch a little less actually)... could be a factor in long-term strength as you said too!
710SL =
The Z510 and 610 actually have a lower breaking load (1200kg) than a Kool (1300kg)... I've used both and not snapped either with an 18T up front (yet).. was annihilating Kools with a 16T front though, very much doubt a 510/610 would last on that size ring either.
That is certainly not what we said! The warranty coves manufacturing defect and material defects - constantly landing the chainstay on a wall/obstacle is clearly outside of this.
Anyway, back on topic, hope your frame gets replaced quickly adad
T6 = the heat treating process.
Why are the Trialtech bars expensive? Monty and Try-All both cost more, personally I think £49 is more than competitive!
That's normal for a 20" bike... as the rear end is so narrow, it's virtually impossible to line the sprockets up. I think mine are 12mm out of alignment with each other.
How old was the chain that broke?