I suppose the "guess" comes from experience in doing such gearing with a 13-15-17-20-24-28-32 freewheel and 26/44/48 rings. What usually doesn't get expressed about half stepping is that you simply don't have to half step, or certainly not all the time ! What I'd do is simply treat it like any other triple with typical spreads(like 36/48 rings for example), and only use the half steps as a fine tuning when necessary. the efficacy of all this really comes down to knowing what gear ranges you typically ride for your local terrain. Hence, no cookie cutter formulas ! This is what I love about multiple rings and cogs, there's endless ways to configure and shift it all.
On Sunday, May 8, 2022 at 12:59:54 PM UTC-4 Drew Saunders wrote: > "A half step triple would work, like a 44/40/28 for example. The numbers > are off the top of my head, not a suggestion. Having the half step would > help split some of the large jumps in the cassette." > > You guessed pretty well. The jumps in the 13-42 average about 18%, and a > 44-40 is about a 9% change, so that's a near perfect half step. A 28-42 is > a pretty low gear, so if anyone really wanted to live through the glory > years of half-step gearing again, the 13-42 would work. I don't know why > anyone would want to shift so much if they didn't have to, but you could. > > On Wednesday, May 4, 2022 at 5:00:26 PM UTC-7 Garth wrote: > >> As long as you're within the total capacity of the RD it could work with >> one of those Wolf Tooth derailleur hanger extensions, called a Roadlink I >> think. Others make them, but Wolfies and Wheels Mfg I know for sure use a >> stainless steel bolt, while the other use aluminum. The Wolfie helps to >> clear the largest cog only, it doesn't add any capacity, that's for the >> RD. A 13-42 , at 29 teeth, doesn't leave much room for a triple with much >> spread. 45t is what most mtb RD are ? That leaves 16t spread for the rings. >> I for one never use certain combos of course so these "formulas" are >> theoretical, actual use, if you know what you're doing, can go beyond all >> that. "Know what you're doing" ... meaning .... not running say a 26t small >> cog and the last 3 cogs, and likewise, not using the big ring in at least >> the 2 largest cogs, it really depends on the crank chainline and how much >> you heed or ignore the horrible sound of cross angling of the chain. >> >> A half step triple would work, like a 44/40/28 for example. The numbers >> are off the top of my head, not a suggestion. Having the half step would >> help split some of the large jumps in the cassette. >> >> On Wednesday, May 4, 2022 at 7:11:11 PM UTC-4 Sam Perez wrote: >> >>> Any one know if a 7 speed 42 would work with a long cage silver triple? >>> Or is it only compatible with a wide double? >>> >>> Thanks >>> Samuel >>> >>> Sent from my iPhone >> >> -- 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 rbw-owners-bunch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/19465b2d-ac29-458a-9fdd-86d16b8f0510n%40googlegroups.com.
