Joined: Apr 2010
Posts: 13,501
Likes: 995
From: Boston-ish, MA
Bikes: 72 Peugeot UO-8, 82 Peugeot TH8, 87 Bianchi Brava, 76? Masi Grand Criterium, 74 Motobecane Champion Team, 86 & 77 Gazelle champion mondial, 81? Grandis, 82? Tommasini, 83 Peugeot PF10
Ummmmm, I've never used a high-end Simplex derailleur which used a stop, but the old Prestige had a spring at the top and the bottom so the position of the parallelogram and therefore the jockey pulley was never deterministic. Rather, it was the balance between the upper and lower pivot springs. Of course that might explain some of its unpredictability, but that feature per se never seemed to be an issue. But what to I know?
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Real cyclists use toe clips.
With great bikes comes great responsibility.
jimmuller