Rear travel is hard to measure because of elasticity of ti plate.
I tried to release air from shock, bike upside down, push down the rear wheel and measure the vertical travel.
It is around 60mm.
I made a calculation, considering it is a single pivot, same result 60mm.
If the seat stay angle is low, the travel is bigger.
Some says they have 95mm rear travel with 38mm shock on softails. This is marketing, not truth.
If you opt for a softail, keep in mind that this is not a full suspension bike, but something between a hardtail and FS.
SAG
I ride 25% SAG on shock, and get full travel on jumps. That's perfect to me.
I lock the shock on every uphill, because i like very reactive bike when pedaling.
BB drop
I think you should have a look at hardtail BB drop with same geo, and reduce it by around 20mm.
Mine is 42mm BB drop, whereas Kona ESD hardtail is 62mm (geo quite similar).
I do have pedal strike sometimes on rocks when climbing, but i have the feeling that I am "in" the bike.
I still have the ability to manual when i want.
Thanks for the detailed response!
My backstory:
I do not know if you are familiar with the Salsa Dos Niner, but that is the softail that made me like this type of frame. Seeing your thread, made me want to get back on one. The Dos Niner is one of my all time favorite bikes. Unfortunately, Salsa made these out of "scandium" which was some kind of enhanced aluminum. They only had three model year productions of the frame. Green color, orange and finally silver. This scandium metal they used cracked around where the stays met. When Salsa reinforced this area, cracks started to happen around the shock mount. I had an orange model that cracked after just over a year of usage, but that frame rode great for an XC bike, and I have always wanted to be on a bike that took the edge off the ride, but didn't make me feel like I was riding on a sofa as full suspensions feel like for me. Plus full suspension has the hassle of having to change the pivots. Now that I am well into my 50's, I am confident that a softail of this type is the frame will let me ride hard, feel in tune with the trail, have minimal maintenance, and not beat me up so much so I have quicker recovery time. One other aspect to note, I like about your frame design, is the rear tire clearance, having a large rear tire, takes off some of the harshness, too.
I have been doing a lot of geometry research, and as I mentioned the rear travel, bottom bracket drop is the one area where I am a bit unsure on.
A difference that I have seen in many Funk frames versus the Leon frames is the dimples at the end of seat-stays. I believe this allows for additional upward flex / travel, maybe 5 to 10mm. Do you think it is accurate to make this assumption?
Also, your model is showing 35mm of stroke on the shock = 60mm of travel. I plan to use a shock with 40mm stroke. Would this equal about 70mm?
Thanks again for your insights!