I followed up with Action Tec on the questions of life expectancy and interchangeability. Russ told me life expectancy should be at least 3X that of Shimano steel cogs, depending on cleanliness and lubrication. That seems reasonable. One of my touring buds just paid $85 for a complete Ultegra 9 speed. Russ says in my app (8 speed friction) that using individual cogs would work. He advised using their complete cassette for best results with 9 speed index, and that makes sense, given the tight tolerances req'd in that app. One major plus they offer is custom mixes. If you blow thru a cog set every year, this may be a higher cost but better value alternative.
dougP On Nov 3, 10:34 am, doug peterson <dougpn...@cox.net> wrote: > > Don't you need to start with a complete cassette, so that when the > > individual sprockets wear out you can replace them? I don't think > > they're meant to be replacement items for rehabilitating worn Shimano > > cassettes. > > This is a fair question - does anyone know why they wouldn't work? > > > Actually, given cost and availability, rather than rehabbing an 8, > > wouldn't you be better off switching to 7 speed? > > 7 & 8 sp cogs are close enough in thickness that either works for me. > I'm now up to 5 7 sp cogs on my 8 sp. I had a couple of spare 7sp > cassettes when my bike came with 8, and just pick up the odd 7 sp when > I see one. Great good fun and I get to pick my own gearing, just like > in the days of Uni-Glide. > > > > > AFAIK the life span of Shimano Dura Ace cassetted with Ti sprockets is > > dramatically shorter than steel Ultegra level cassettes. > > I did not know this. Steel can be treated in many ways to change it's > characteristics of hardness, durability, etc. I know the various "HG" > designatiions perform differently. Maybe DA is meant to wear out? > The Actiontec stuff looks like the intended market is MTB. If so, it > would have to be abrasion resistant. > > dougP --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bunch@googlegroups.com To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en -~----------~----~----~----~------~----~------~--~---
