Suspension - forks, shocks, stems and so forth (but not seat posts, they have their own thread)

think I'd rather adjust bar height at the bars, rather than the fork

This

Tempted by a 160mm B1, if it’s going to ride lower… but the mid-stroke should be higher than before with a 150.

I was initially tempted to switch to a 180 b1 spring to see if it would rider higher. I never got round to it as I couldn’t really figure out if doing that actually made sense or not.

After a while I stopped thinking about it and realised that at no point ever while riding did I think I needed more mid travel support.

Similar fettling with my C1 Lyrik at 140mm led me to that conclusion too. Contemplated a different air spring, coil conversion, different damper, etc. What I found really made it feel much better was putting it at the recommended base tune, dropping the PSI a touch, then adding compression when it felt like I needed it. Astonishingly, it feels very supple, supportive and has a tiny bit of travel in reserve for when things get a bit squeaky bum time and I need rescuing.

My mid-stroke was/is good, issue that I’d like to address is that to get that mid-stroke support my small bump is harsh and I don’t get full travel unless I do a massive drop.

I’m sure I can balance the mid and end stroke, but to do all three needs more negative air spring - or so I have read, and that’s where the Secus comes in.

Which, of course, may not work! But we’ll see, the point of life is to experiment and learn.

This was the post that I saw, and having just spoken with TF Tuned they are swapping my C1 to the B1.

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The B1 spring is the one that sat 10mm lower in its travel/sucked down, right? Hence the C1 correcting that. And this Secus thing means it sits even lower, so will you need a 30mm longer spring? Maths was never my strong point

I think the C1 addresses the B1 “suck down” issue by reducing the size of the negative air spring, which directly opposes what the Secus does.