I used a variation of the stay-only mounting in order to hold the fender in place while I made a template for a fork crown mount and it was pretty wiggly. I think with three sets like @drandalls drew I think it could work.
So when I had Johnny Coast put new seatstays on this bike I was like pffft fenders? Don’t put a hole in the brake bridge, I’m never gonna bother. Now I ask: is there a good way to mount a fender on here other than ‘drill a hole in the brake bridge’
Seatstay bridge on this bike has a threaded boss that you can use to mount a fender with an L bracket. I took a fender eyelet bolt, tapped it to M5, and used that to attach the fender.
The other nuts are more for decoration and hiding the threads of the bolt, but I kind of like how it looks. Might eventually trim the bolt down so that the end is flush with the fender eyelet.
Only thing I’m not really happy with is the boss that this is threaded in to isn’t perpendicular to the seat stays, but there’s nothing I can do about that. I was very pleased that I can get the thru hole aligned without the need for a jam nut. It’s like it was made for this!
That’s what I do with my frames and it’s a mixed blessing; it’s a bunch harder to clean up the fender line w/o first building a clearance tool and if the fender starts to rattle you need to pop the rear wheel to check that connection
if you’re building/supplying fenders with the frameset though it makes such a nice interface— threaded bolt from underside, jam nut either side of the boss OR a captive threaded adjuster within the seat stay bridge
My Jamis (aurora elite) is a similar color with silver accents, but sadly it’s from 2010 when they thought 700x32 was all you needed. It converted to 650x42 pretty well but the fender is a real wonky fit because the stays were never designed for a fender that wide.
I think published clearance for this thing is 50mm on a 700c wheel. 35mm max with fenders but I’ve got so much room I think I could do a 38 no problem. Tires on there are GP5000 ASTR that are just under 32mm after a few hundred miles.
It’s a really nice bike that I can see myself holding on to for a while. Sometimes when I’m riding I’ll think I wish I had a normal light road bike again, but then like last night I’ll come up on wet or salted roads and remember that a bike with fenders is the best thing ever.