I am building an Open Up now. The shop that I bought it at had a demo bike (an Open Up in size medium). I took the rear wheel from my S-Works Diverge and put it in their Open Up to test clearance. The wheel is an Enve G23 with Hurricane Ridge (endurance casing) tires. The tire measures about 43-43.5 mm wide at about 34 PSI and the knobs appear to be about 2.8 mm in depth.Zdog wrote: ↑Fri Aug 20, 2021 4:23 pmNice Build and tire stash! I have an Open Up that I just installed the Barlow Pass EL's on and I really like them. I would like to try the Snoqualmie Pass and Hurricane Ridge tires but the spec on the Open frame says 40mm max @ 700c so I did not want to buy them without knowing they would fit first. Do the Snoqualmie Pass tires work fine with enough clearance? Have you tried the Hurricane Ridge?
The wheel would spin, but it was really tight. The limiting factor was the clearance to the seat tube. I am surprised that Open built in so much clearance for the chainstays, but that the seat tube clearance is so low. Maybe they intend for riders to go to a 650b once the tire is bigger than 40 mm.
I think that I read somewhere on the Open website that they recommend at least 6 mm of clearance. I did not measure, but it was likely less than that. The guys at the shop agreed that it was a "no go." The tires are awesome, even in the endurace casing, but I probably would not go bigger than a RH Steilacoom in my Open UP. I am actually worried about that size too. It gets expensive to buy a tire only to find out it is too big. I recently did that with a Rene Herse Stampede Pass on my Moots road bike. It would spin, but the tire was too close to the drive side seat stay of all things.
I assume that you are running the Barlow Pass EL's tubeless? I have heard they are hard to get to seal. Was that your experience? I have a set of Barlow Passes in the standard casing and they have held air well, with no seeping sealant. I think that I used the standard Orange Seal.
Would love to hear if there is enough clearance on the Snoqualmie Pass. If you look at the actual widths they list on the RH site, the Snoqualmie Pass and the Hurricane Ridge appear to have the same size casing (despite them listing the Hurricane Ridge as 42 and the Snoqualmie as 44). So maybe without knobs, there is enough clearance to the seat tube.