Schwinn Varsity and Collegiate Sport upgrades
09-18-20, 10:22 AM
#76
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Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
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Sealed BB for a one piece crank, anybody? 24tpi. There was once even a hollow chromoly OPC, believe it or not. https://www.planetbmx.com/shop/tange...pc-cranks.html
I love the one piece crank. For a city bike, commuter, etc., they are ideal. Nice thin steel arms look good. Plenty of good platform pedals available. Weight weenies can go eat a steak and walk up some stairs. It is a great design in its simplicity, strength, and low cost.
I love the one piece crank. For a city bike, commuter, etc., they are ideal. Nice thin steel arms look good. Plenty of good platform pedals available. Weight weenies can go eat a steak and walk up some stairs. It is a great design in its simplicity, strength, and low cost.
09-18-20, 11:08 AM
#77
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I'm aware, which is why I stated the threading on that sealed unit. I am glad you pointed that out for those who may not be. I was merely showing that there was some attempts at evolution of the OPC design. With a 24 tpi crank, instead of the Schwinn 28 tpi, one could "upgrade" to a sealed bottom bracket. Such a setup might be preferable for certain environments for some riders. In a technical sense, 28 tpi might hold an edge, but a 24 tpi crank/bottom bracket is perfectly fine.
09-18-20, 01:13 PM
#78
Ride, Wrench, Swap, Race
Join Date: Jan 2010
Location: Northern California
Posts: 9,194
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
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I see, I was more worried that the OP might not be aware of Schwinn's (unique?) threading!
