Freewheels & Cassettes (WikiBooks)
http://blog.centurycycles.com/2009/07/techtalk-freewheels-vs-freehubs.html
http://forums.bicycletutor.com/thread-4492.html
http://trianglecycling.com/threads/possible-to-build-a-27-wheel-with-a-shimano-freehub.30802/
http://www.bikeforums.net/archive/index.php/t-609690.html
http://www.bikeforums.net/archive/index.php/t-803350.html
http://www.bikeforums.net/archive/index.php/t-719469.html
Shimano 6 speed: 11-28; 11-30; 11-32;
Shimano 7 Speed: http://sheldonbrown.com/k7-7.shtml; 11-28; 12-28; 13-28; 13-30; 13-34; 14-32]
Shimano 8 Speed: http://sheldonbrown.com/k8.shtml
converting 7 to 8 or 9: http://sheldonbrown.com/k7.html#897
2 X 9 Drivetrains: http://www.bike198.com/mountain-bike-setup-2x9-drivetrains/
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RANDO'S CASSETTE
Shimano Deore DX Hyperglide 7speed (CS-HG70) [VeloBase]: [13 - 15 - 17 - 19 - 23 - 26 - 30] (1990-1993)
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MINTY'S FREEWHEEL - ORIGINAL
6 speed: 13 - 26
Possibilities:
With original derailleur, 28 is the maximum
Sheldon Brown: 6 Speed Freewheel; conversion to a 7-speed
Shimano 6 speed: 14-28
Shimano 7 Speed: http://sheldonbrown.com/k7-7.shtml; 11-28; 12-28; 13-28; 13-30; 13-34; 14-32]
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MINTY'S FREEWHEEL - NEW
Shimano 600 MF-6208 6 speed (14-32T) (14-17-20-24-28-32); 126mm threaded hub. [VeloBase 6208] [mid to late 1980s]
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SYNAPSE
Rear cogs- New: Shimano 105, 11-28, 10-speed [CS-5700: Sprocket Sizes 11-12-13-14-15-17-19-21-24-28]
Rear cogs- Original: Shimano 105, 12-25, 10-speed [CS-5700: Sprocket Sizes 12-13-14-15-16-17-19-21-23-25]