I am no good with the calculator posted because I don't know some of the ratios.
I have a new (1/2 gallon of 32-1 synthetic oil mix used) Silver Grubee Sky Hawk 66/80 in a Schwinn Mesa. I made a speed run on flat pavement a few minutes ago with my Tiny-Tach and my GPS.
The tires are 26X1.95 and the gearing is stock the way it came from Bikeberry.com. 44t wheel sprocket.
The tach read 7500 rpm at 30 mph. Is that close to what you guys are seeing? I am getting a SBP shifter kit tomorrow. It being a small world I find out that Jim from SBP lives less than a mile from me.
Jim
I have a new (1/2 gallon of 32-1 synthetic oil mix used) Silver Grubee Sky Hawk 66/80 in a Schwinn Mesa. I made a speed run on flat pavement a few minutes ago with my Tiny-Tach and my GPS.
The tires are 26X1.95 and the gearing is stock the way it came from Bikeberry.com. 44t wheel sprocket.
The tach read 7500 rpm at 30 mph. Is that close to what you guys are seeing? I am getting a SBP shifter kit tomorrow. It being a small world I find out that Jim from SBP lives less than a mile from me.
Jim
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