Refining a prior posted question. 15 speed 1986 Specialized Stumpjumper-Sport has original 5 cog freewheel, 14-30. Original Analog shifters. Biggest cog needs replacement. Individual cogs are no longer available. 5 cogs is plenty for my needs, but 5 cog freewheels seem pretty rare these days. Shimano makes two versions of a 6 cog freewheel that are sold through Walmart.com for $10 - $15. 14-28 (MF-TZ20), or 14-34 (MF-ZH30). Prices seems pretty good. What are the issues involved in transitioning from a 5 cog to one of these 6 coggers?
- Would it fit in the same axel space?
- 6 cog chain compatibility spec states 3/32". Does that imply a Shimano Hyperglide chain?
- If so, would SH chain be compatible with existing front chainwheel cogs?
- Any derailleur/cog clearance issues switching from 30 to 34 cog?