I’ve just installed the 2019 Debonair air spring upgrade to my 2018 Lyrik RCs, in order to reduce their 170mm to 160mm for my new Bronson frame. While the 170mm version perhaps sat 5mm into its travel, I’ve noticed the ?upgraded 160mm airshaft now sits about 15mm into its travel at rest before I’ve even sat on it. (Unless I lift the front wheel and pull down on it.) The fork looks pretty much identical now to the Fox 34 140mm on the bike sat next to it. When I emailed the supplier, he explained that it’s a feature of the negative air spring, and what makes the small bump sensitivity of the fork so good. He added that it’s still got 160mm travel. I understand and appreciate that to a point, but am struggling to understand how a fork that at rest has about as much stanchion showing as a 140mm fork of another brand, is still considered suitable from a frame speccing a fork of at least 160mm. And to ride it just feels steep and horrible at the front. And I guess it will do, given that it’s got less travel (that I can see) than the 150mm shock out back.
I know Rockshox introduced the 2021 air shaft upgrade a few months ago for those who wanted to reduce their fork’s off the top sensitivity, but I’m starting to wonder if it’s because they’ve still not quite got the negative/positive air chamber thing right, but don’t want a raft of warranty claims on their hands.
Any experiences/thoughts? Am I failing to see the emperor’s new clothes, and is a trip to Specsavers on the cards?
(Plan B is just to pop the 170mm shaft back in there (the Bronson takes 160-170mm), and just go ride my bike.)