Start Dating schwinn varsity

Dating schwinn varsity

It seems to have fairly stiff springs, a well-made precision built mechanism with little if any play, and really cool machined steel pulleys that should last a lifetime.

There are necked-down parts that fit into the top tube and down tube, like internal lugs. Muller has a very detailed explanation of this process, in his superb article: , also on this site. The Typhoon probably dates from the late '50's or '60's.

If I recall, it was what Schwinn called a "cantilever" frame, where the seat stays pass by the seat cluster and continue on in a graceful curve to join the bottom of the head tube.

To gather more information I acquired a couple of GT-100s to study as I've never had one before myself.

On inspection the first thing I found is that it must be the absolute heaviest derailleur ever made at 1lb 0.4 oz!

With the hanger pivot spring properly engaged, when the GT-100 is not installed the spring tension will force the hanger all the way rearward until it almost contacts the cable adjuster as seen here: When the pivot spring is either broken or disengaged the hanger can flop forward like this: I had to modify the bend of the hooked end of the spring in order to get it to stay engaged in the "5" or "10" marked holes in the hanger, and noted that it was extremely difficult to reassemble with the spring set on the higher 10-speed tension setting.

On the one where the spring was actually broken, fortunately it was just the hooked end that was broken off so I was able to repair it by bending a new 90 degree hook in the end of the spring so it would re-engage in the hanger.

Older Schwinn "cruisers", such as the Excelsior that was the inspiration of the first mountain bikes, used a straight lower top tube from the bottom of the head tube to the seat tube.

They also manufactured their own rims in the Chicago factory, the "Schwinn Tubular Rim".

It was replaced in early '74 by the Shimano built GT-120 according to Schwinn bulletin 42 (Feb.

'74), which stated: The GT-100 was featured in the March 1970 Bicycling Magazine "Derailleur Reliability" article and can be seen on the GT-100 page on Disraeli Gears.

I've been researching Schwinn derailleurs lately and this post is about the Schwinn Approved GT-100/GT100.