In the end I think it'll all work out, though, because I have found a very promising balloon tire Rollfast on CL. Thanks for all the help guys!
What size is the early 90s Spesh?
No gearing seems to help me with skinny 2.1 - 2.3 tires in deep slush or snow more that 3 inches. I even tried 30 x 36 with a 36 tooth front sprocket modified to become a rear sprocket. I really could go through deep snow and slush but I couldn't go fast enough to get good gyroscopic effect and kept going off into the snow bank. I went about 6 miles for a test after about 3 inches of snow. I was able to go through where the plow had thrown up snow, but just barely. It took way too much cranking on the two mile flat straightaway. I tossed it.
The snow gets pushed around by car tires, gets deep in places and rutted and mixed with sand and salt and becomes heavy, which makes it hard, but not impossible to ride in with my gearing. The low gear helps, but not enough to matter. You can push through slush with low gearing, but it is so had that you can't keep it up, and it is impossible to keep in a straight line as the heavy ruts and ridges dictate where you are going. It would probably help in shallow slush. The low gearing I use (30 x 22) is to compensate for the extreme weight of the bike and tires and the big hills we have that lead away from Lake Superior. It also allows me go slow while still peddling over ice. If the snow bike trails are hard enough then the low gearing allows me to ride on a lot of it with out pushing, but it is seldom hard enough for skinny tires. Slush is not usually a problem for us until spring as they keep the bike trails plowed, except after a big storm. In the summer I use 46 or 48 X 22 or 23. This works perfect for our hills for me, as I can ride up almost all our hills.
What I learned from my experience would be to try a lighter cruiser than my tank Wally World Huffy and to use commercial ice tires that are a lot lighter than my homemade jobs. I would like to try 1.75 because of the weight savings and see if that made it easier to ride on our ice covered bike path (we have about 20 miles of paved bike path that are plowed in the winter, a little more in the summer). The bike path is asphalt so after plowing the remaining snow melts and freezes and we always have a lot of bare ice on it. Sounds like you have a different weather situation than I do. I am retired and ride for the enjoyment while you have to ride each day for work. You could try 46 X 23 if you have a modern coaster hub. All you would need is a new $10 chain or some extra links. The rear gear change on these modern hubs is easy. You use two small screwdrivers to pry off the "C" spring and the old gear lifts right off. Drop the new one on and hold one end of the "C in the grove and stretch the other end of the "C" with needle nose pliers and in it goes. The most this conversion would cost you is $20 and I think it would help some. My low gearing probably would not work any better than that for your situation.
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