Thanks for the responses. Great stuff. The triple with a guard on the big ring presents a conundrum for me. If I have a triple crankset, then it is probably most useful as a triple. Yet, I don't think I need a triple; a double can do the job, while simplifying. But I don't want a "crippled triple" - a triple with the big ring taken away.
Highlighting the importance of the cassette is a great call, and I hope wider ranges become more commonplace and less pricey. The high gears and big cassette ring are not the crucial point for me. Yes, I'd like to get over 38 T on the big ring. I get to the 46/11 combination on my touring bike somewhat regularly in hilly San Diego. But about 40-48 T is fine for the big(gest) ring. Anywhere in there. More tricky is the low end: how to have a small ring up front that isn't just for climbing, but to still be able to climb. This is where the wide range cassette seems to be most useful. Thank you Abe (& James @ Analog Cycles) for the link to the Turkey Vulture Supreme gearing <https://www.analogcycles.com/2018/03/30/get-your-clutches-into-turkey-vulture-supreme-gearing/> article. I think its right on. I was unaware of Middleburn and had only heard of a derailer clutc; I didn't know what it does or that apparently the SRAM version is better than Shimano (thoughts?). Take care all. -Matthew (formerly MAP, my initials, but no longer, to not confuse with MAP Cycles) San Diego On Saturday, March 14, 2020 at 10:22:36 AM UTC-7, Pancake wrote: > > Thanks to recommendations on this list (and from looking at Analog's > article > <https://www.analogcycles.com/2018/03/30/get-your-clutches-into-turkey-vulture-supreme-gearing/>) > > I ended up with: > 46/30 front rings on Velo Orange double crankset with Shimano RX100 > derailleur > 11-40t sunrace cassette 9 speed with Shimano XT long cage derailleur (the > LX also worked) > > *Huge range (exactly the same as my prior 46/36/24 triple and 11-34t > cassette*), normal and widely available derailleurs/cassette, and similar > cranksets can be found for less than $100 (though not at pretty as this > shiny VO model that's not available anymore). > > When cross chained small front, small rear, there's a chain rub on the > teeth of the large chainring which some .6mm spacers will eventually > correct, but for now it doesn't happen that I'm ever cross chained that way > so no problem! > > Abe "in a valley where he wants range for flats and hills" > > On Friday, March 13, 2020 at 11:41:37 AM UTC-7, James / Analog Cycles > wrote: >> >> We've run 46/20 with a 12-36 out back with fine success. Middleburn lets >> you run a 110 big ring, no middle ring and 58 bcd granny gear for said >> combo. Friction shifts fine with TA rings. The resulting gear range is >> super wide. 690% gear range. >> >> -James / Analog Cycles / Tanglefoot Cycles / Fifth Season Canvas / >> Discord Components >> >> On Friday, March 5, 2010 at 5:38:42 PM UTC-5, Bill Lindsay wrote: >>> >>> I'm running Ritchey/Sugino cranks on my Hillborne and another set >>> waiting for me to pay off my Bombadil. These are 94/58mm bolt circle >>> cranks. I love them and would but 5 more sets in 172.5 if I could. >>> They both came with 22/32/42 chainrings. I am running the Hilborne >>> right now as a wider range triple: 22/34/46. The cranks that are >>> going on to the Bombadil were last used as a double on a cyclocross >>> bike and worked great with a 30/44 with Campy ergo brifters. I'm >>> wondering what's the biggest jump on a double you've run. Kevens >>> dream Bomba has a 24/40, for 16t of jump. 34/50 is standard on >>> compact road cranks nowadays. I'm thinking of trying a 46/29 on these >>> Ritchey arms. I've never run TA or TA-style cranks that I think allow >>> even more flexibility. Has anyone ever run a 20+ tooth jump between >>> two chainrings? >>> >> -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/7aef4c3c-5bb7-44a7-9a35-1de5f26ed1ee%40googlegroups.com.
