Bike Forums - View Single Post - Questions About An Old Schwinn Sports Tourer

08-10-09 | 05:54 AM

#11

Road Fan

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Joined: Apr 2005

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From: Ann Arbor, MI

Bikes: 1980 Masi, 1984 Mondonico, 1984 Trek 610, 1980 Woodrup Giro, 2005 Mondonico Futura Leggera ELOS, 1967 PX10E, 1971 Peugeot UO-8

Quote:

Originally Posted by mparker326

Scooper, this is just an observation I have made recently regarding the Gran Turismo:

I have a '72 Sports Tourer with a Gran Turismo derailleur. Shifting was poor with the Schwinn approved 14 to 34 5 speed freewheel. Since the rear spacing was already 126 mm, I put a 13 to 30 7 speed Suntour freewheel on it. The Gran Tursimo shifts very good now. Maybe part of the GT's problem was the huge jumps between gears on some of those old 5 speed touring clusters?

I think that's very plausible. First, big jumps are harder to shift than smaller, and the SunTour tooth could be sharper-edged than the old freewheels.

Should work nicely with a Shimano or Sachs freewheel, which have grabby teeth.

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