I saw the catalog which says that the ESTA gets slacker as the sizes go up, which I found bit perplexing. But Norco is also the only company which varies chainstay length by size so maybe that's got something to do with it. I'm an XL rider and I like where 74' puts me relative to the BB for climbing. Not sure I'd want it any slacker regardless of chainstay length. Does someone in the loop know more about their reasoning for this?
Looks to me that the just keep the seat tube profile exactly the same for all sizes and just extend it for the larger sizes. Since the esta is generally measured from the top-centre of the head tube this makes sense.
To me this is just lazy design because I don't know a single tall person that likes a slack sta. Totally bags out the back end on steep climbs having this much mass so far over the rear of the bike.