New User Group: Bicycling

I think you'd better ask this guy first.

bicycle repair is good too. Gearing, spokes, brakes, cabling.

I have not done spindle extraction yet because it takes special tools.

Also materials, technology, new gearing systems (CVT's etc)

The time is due for a breakthrough in bicycle transmission systems. The derailleur seems to be at the practical limits of its evolution. Rear gear clusters now carry up to eleven sprockets on high end road bikes. This has reached the point of diminishing returns. Chain skewing reduces efficiency. Multiple sprockets add weight.

A simple, rider adjustable variable diameter sprocket is one possibility. Many have tried to solve this problem. The Nuvinci CVT is another approach. I understand it has weight issues though.

I look forward to discussions on various bicycle related topics.

What I suspect would be good, but I have never seen, is a combination of the derailleur and the old 3 speed hub. Say the 3 speed in the rear axle and perhaps 3 sprockets on the crank. That would give 9 ratios, which should be plenty for a guy like me who is a recreational rider for some exercise.

The bike I am using now is a circa 45 year old Schwinn with 10 speeds. Had to resurrect it after many years stored--new tires and lube. Shifter worked OK, but I relocated it so old-guy-me could reach it easier. Much better!

A guy in our high school had just what you describe. This was in the mid-sixties. As I recall he had a five sprocket cluster at the rear wheel in combination with the three speed hub, which gave him fifteen gear ratios. I don't remember the manufacturer. Maybe he did it himself. We were envious and amazed. It was one of the first derailleurs in this area (central Ontario). Of course, none of us could keep up with him.

Now, as you probably know, Shimano has brought back internal hub gearing with their 8-speed hub. Very nice. Too heavy for a road bike though.

Set it up and you can count me in.

I ride about 3000 miles/year, but spend more time re-building my seven bikes into new configurations. A change in seat position, saddle position, fork rake, etc. can have quite an effect on the riding quality of a bike. I have experimented quite a bit with these concepts. I would find others ideas on this interesting. The engineering of the bicycle design is a bit beyond most bicycle specific discussion sites.

I'll participate. I ride a recumbent Bike E and am interested in electrifying bikes. My favorite bike memory- riding down Haleakala volcano on Maui in 2004- watch sunrise at top of volcano then coast~30 miles down to the sea.

You better believe that I checked the brakes at the top real good before starting down.

milo

Bump

It seems to be an excellent suggestion for a user group here!

I'm resurrecting an old Super Cycle 2100S 26" mountain bike for recreational riding, and am having a heck of a time finding info and a shifter replacement for it's Shimano SIS-TY22-7 (21 speed) drive components and setup.

Please let me know when you get it on line - Loupy.