Originally Posted by
base2
If you study the picture, it appears that at the dropout there is a bolt that joins the top of the drop out to the seat stay. There is no substitute for seeing the thing in person in real life, but it appears that it would allow for a belt.
Now as to whether or not an $1800 Rohloff hub (the only tandem rated hub I know of) and modifying the frame spacing to accommodate it's 135mm disc spacings within the OP's budget is a different matter. *Thinking out loud*Tig in a 2.5 (or 5mm) washer on the inboard side of each dropout & use an extra long skewer?
But yeah, disc tabs are probably left to a frame builder who knows what he's doing. Definitely not worth the trouble.
Ahh, yes, thanks. I see the bolt now.
Regarding the disc brake, though -- my understanding is that it's more than just adding the mounts. The stays (or fork legs for a front brake) must be strong enough to withstand the forces applied to them by hard braking. That's difficult (uneconomical) to add to a frame.