Scott, the capacity math works out but it looks like the specs for that rear derailer list a max sprocket of 34t (https://bike.shimano.com/en-EU/product/component/alivio-t4000/RD-T4000.html). It may still work outright (specs are conservative) but, if not, one of the links/tabs (e.g., WolfTooth road or goat link) to drop the derailer down will likely make it all work out.
On Monday, May 2, 2022 at 11:02:14 AM UTC-7 greenteadrinkers wrote: > Was hoping for some advice... on my Sam, I'm interested in the Jim 7s > 13-42, with a 40 x 24 upfront, and Silver shifters in friction. The big > question I have is rear derailer choice, would the Shimano Alivio T4000 > make sense? it's rated as a 9-speed with a total capacity of 45T. > > Thanks, > Scott > > On Monday, May 2, 2022 at 1:03:09 PM UTC-4 lconley wrote: > >> Nerding-out on gearing: >> >> The % changes on the S-ride 13-34 are 14%, 18%, 15%, 13%, 15%, 19%. >> maximum delta % in lower 6 is 5% (13% to 18%) >> >> The % changes on the Shimano 13-34 are 14%, 13%, 16%, 18%, 19%, 16%. >> maximum delta % in lower 6 is 6% (13% to 19%) >> >> I thing the S ride is better, but this is much ado about nothing. >> I personally think the biggest jump should always be on the biggest >> (lowest) gear as is the case with the Riv S-ride. I don't need two bailout >> gears. >> >> I still ride freewheels on some bikes - My Rivendell sourced Shimano 7 >> speed freewheel on my 1x Riv commuter is 14-16-18-20-22-24-34 for 13%, 12%, >> 11%, 10%, 9%, 34%. -maximum delta % in lower 6 is 4% (9% to 13%) I think >> this about ideal, could have maybe substituted a 25 for the 24, but again - >> much ado about nothing. >> >> My NOS Suntour Winner 7 is 12-14-16-18-21-24-30 for 15%, 13%, 12%, 15%, >> 13%, 22%. maximum delta % in lower 6 is 3% (12% to 15%), It is going on my >> Bombadil with a triple crank. >> >> Laing >> >> On Sunday, May 1, 2022 at 9:17:20 AM UTC-4 John Hawrylak wrote: >> >>> I agree with Garth about the poor gear progressions on the 13-34 Jim. >>> The Shimano HG-50-K 13-134 is >>> 13-15-17-20-24-29-34 >>> which IMHO is much better, it avoids the 15-18 problem and has 2-3-4-5-5 >>> spacing above 15 vs the Jim's 3-3-3-4-6 spacing. I used the HG-50-K on >>> my 88 Voyageur and gives very good spacing. IRD also sold the same copy >>> of a HG-50-K for about $30 2 years ago. I do not see it in the IRD store >>> now. Maybe they changed suppliers. >>> >>> The 13-42 is also poor do to the 13-16 jump leaving NO 2 step drop for >>> the high gears. My 1975 Shimano 14-32 5 speed had a 14-17 jump and was >>> always frustrating on level terrain finding a good high cog. The 13-15 >>> solves that. >>> >>> In all, why does anyone want to go from 9 speed to 7 speed??? I can >>> see them saying here is a supply of 7 speed for folks with 126 OLD rears, >>> but if you have a 130 OLD rear just use the 9 speeds out there. They have >>> better progression. >>> >>> I think RBW is pitching folks a lemon with these as saying convert from >>> 9 to 7 speeds. >>> >>> John Hawrylak >>> Woodstown NJ >>> On Saturday, April 30, 2022 at 7:30:36 PM UTC-4 Garth wrote: >>> >>>> I had some bit of hope that these would use an consistent gear >>>> progression of 15-17-20-24 on the 13-34, but no ..... S-Works does the >>>> overly big 15-18 jump along with the 18-21-24 which is unnecessarily >>>> close. >>>> I often wonder of anyone who designs these actually rides it. IRD does >>>> some >>>> weird cog progression with some of their offerings as well. >>>> On Saturday, April 30, 2022 at 5:00:50 PM UTC-4 hinton...@gmail.com >>>> wrote: >>>> >>>>> In 2022, pretty cool to see 7-speed cassettes sell out in less than 12 >>>>> hours. But, if you missed out, this is a PSA that Soma has them in stock >>>>> still, though they don’t include the spacers like Riv did. >>>>> >>>>> 13-34: >>>>> https://www.somafabshop.com/shop/product/590906-s-ride-cassette-7sp-13-34t-cs-m200-6765?category=735 >>>>> >>>>> 13-42: >>>>> https://www.somafabshop.com/shop/product/590907-s-ride-cassette-7sp-13-42t-cs-e500-6766?category=735 >>>>> >>>> -- 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/9df0e2b6-bfc3-4936-ad13-1d303d53cf80n%40googlegroups.com.
