Danson gearbox...now with added weirdness.
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RickTheUncivil
Old School Grand Master
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You mentioned maybe going belt drive, and the limitation of not having a gap in the stays.
Have you seen the Veers split belt system?
https://www.veercycle.com/products/sync ... ike-frames
I imagine others have tried it too, it's just one that popped out of Google . Seems a reasonable solution to me but I wonder whether it's too much of a compromise.
Have you seen the Veers split belt system?
https://www.veercycle.com/products/sync ... ike-frames
I imagine others have tried it too, it's just one that popped out of Google . Seems a reasonable solution to me but I wonder whether it's too much of a compromise.
Re:
Thanks, Rick,
Looks like a decent solution.Definitely worth a go, but I would need to get a RH dropout insert, too, as mine doesn't have the hanger to take their tensioner.
I'll probably make a new frame with more modern geometry, so I can make a seatstay splitter.
I have some 7020 billet ready...
All the best,
Thanks, Rick,
Looks like a decent solution.Definitely worth a go, but I would need to get a RH dropout insert, too, as mine doesn't have the hanger to take their tensioner.
I'll probably make a new frame with more modern geometry, so I can make a seatstay splitter.
I have some 7020 billet ready...
All the best,
Re:
URT works fine as long as you sit on the saddle, the moment you stand on your pedals your whole body adds to the unsprung weight ....
We decided to go for a concentric BB for the Rohloff belt drive and a "normal" suspension design for our Pinion fully combined with a belt tensioner a la Nicolai (still in prototype only)
URT works fine as long as you sit on the saddle, the moment you stand on your pedals your whole body adds to the unsprung weight ....
We decided to go for a concentric BB for the Rohloff belt drive and a "normal" suspension design for our Pinion fully combined with a belt tensioner a la Nicolai (still in prototype only)
I was thinking of putting the pivot inline with the seatpost and as close to the gearbox bridge as possible.
That way the body weight is technically unsprung, but there is no vertical degree of movement available to affect the suspension, just a small fore/aft travel at the BB.
I've got several URT frames (Ibis Szazbo, Breezer Twister, Ballistic, Trek Y-frame, Klein Mantra). I like to ride them as RB tech dinosaurs, so I'm ready for the disappointment
Pivot concentric with the BB is sweet. (Like the Fisher RS-1, to keep things retro)...but difficult to fit in around the Pinion stuff.
All the best,
That way the body weight is technically unsprung, but there is no vertical degree of movement available to affect the suspension, just a small fore/aft travel at the BB.
I've got several URT frames (Ibis Szazbo, Breezer Twister, Ballistic, Trek Y-frame, Klein Mantra). I like to ride them as RB tech dinosaurs, so I'm ready for the disappointment
Pivot concentric with the BB is sweet. (Like the Fisher RS-1, to keep things retro)...but difficult to fit in around the Pinion stuff.
All the best,
danson67":2wc7oawg said:I was thinking of putting the pivot inline with the seatpost and as close to the gearbox bridge as possible.
That way the body weight is technically unsprung, but there is no vertical degree of movement available to affect the suspension, just a small fore/aft travel at the BB.
I've got several URT frames (Ibis Szazbo, Breezer Twister, Ballistic, Trek Y-frame, Klein Mantra). I like to ride them as RB tech dinosaurs, so I'm ready for the disappointment
Pivot concentric with the BB is sweet. (Like the Fisher RS-1, to keep things retro)...but difficult to fit in around the Pinion stuff.
All the best,
looking forward to what you come up with, keep up the good work :!:
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