Joined: Aug 2003
Posts: 3,520
Likes: 12
From: Colorado Springs, CO
Bikes: 1959 Bottecchia Milano-Sanremo (frame), 1966 Bottecchia Professional (frame), 1971 Bottecchia Professional (frame), 1973 Bottecchia Gran Turismo, 1974 Bottecchia Special, 1977 Bottecchia Special (frame), 1974 Peugeot UO-8
The official max tooth capacity is 26t for NR and 28t for SR (I'm guessing that is for the later models since the original SR seems to have been identical to the NR except for the titanium bits. I ran a NR 14-28 in the back and 52-42 in the front with no problems. That seems to be the maximum chain wrap capacity as the chain had to be exactly the right size - I couldn't go one link less or it would lock up and or one link more or the chain would sag in the little/little combination (yeah I know you're not supposed to).
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1959 Bottecchia Milano-Sanremo(frame), 1966 Bottecchia Professional (frame), 1971 Bottecchia Professional (frame),
1973 Bottecchia Gran Turismo, 1974 Bottecchia Special, 1977 Bottecchia Special (frame),
1974 Peugeot UO-8, 1988 Panasonic PT-3500, 2002 Bianchi Veloce, 2004 Bianchi Pista