The Omnicalculator works too. https://www.omnicalculator.com/sports/chain-length
Or use #3, the math forumula. Most useful for overly long chainstays where the standard chain isn't long enough to begin with and will be added to. https://ilovebicycling.com/determine-bike-chain-length/ On Saturday, November 2, 2024 at 5:24:17 AM UTC-4 okeeffe...@gmail.com wrote: > Quick update for the curious. In the end, for a 48T big chainring and 34T > rear sprocket on a 54cm Hillbourne, the chain length was 116 rivets + a > quicklink. Almost standard chain-length but not quite. > > On Saturday, October 19, 2024 at 1:56:48 PM UTC+2 Cormac O'Keeffe wrote: > >> Thanks to everyone for sharing their experience and advice on chain >> length and sizing techniques. It's all been very helpful. You've confirmed >> my suspicion that my chain was indeed too short — I'd taken a 116 link >> chain (mangled a link or two) and ended up with an 114 link chain. This >> meant that as soon as I was on the big chainwheel up front, once I went >> past 14 teeth in the back it locked up the transmission. >> >> One of the things they don't tell you, as obvious as it seems thinking >> back, is when you move the world of long chainstays, is that you are also >> in the land of long derailleur cables and long chains! >> >> - Cormac >> Paris, FR >> >> On Friday, October 18, 2024 at 10:53:02 PM UTC+2 cjus...@gmail.com wrote: >> >>> Pretty sure you are all saying the same thing differently. >>> >>> Bill's method is just fine I bet and is probably the same method as >>> Shimano documents, but with a different baseline for what a link is, >>> regardless of what is technically correct. >>> >>> I checked the Shimano site and they show every rivet as a link count >>> where I suspect both Bill and I have always considered a link to be a full >>> plate with a leading loop perhaps (2-3 links in Shimano doc). The Shimano >>> interpretation seems odd to me but what seems clear is the picture of their >>> 5 links plus a quick-link looks like big/big+2 to me. Next time I pull a >>> chain, I guess I will verify if 116L is # of plates or rivets...whatever... >>> >>> 2 full plates and an open loop for my quick-link is always where I start >>> and if I can remove a plate later to optimize, great, if not I am probably >>> about perfect already. >>> >>> I do also have 2 x 1x Hardtails and both were sized with what I define >>> as big/big+2 per above and setup is about perfect. >>> >>> Just my thoughts. Hope that helps... >>> >>> -Justus >>> Mpls, MN >>> >>> On Friday, October 18, 2024 at 2:18:06 PM UTC-5 pi...@gmail.com wrote: >>> >>>> Bill's method will not work for 1x. Shimano's specifications are big >>>> sprocket and chainring + 5-6 links. >>>> >>>> On Friday, October 18, 2024 at 10:56:13 AM UTC-7 DavidP wrote: >>>> >>>>> Yes - bypass the rear derailleur when wrapping the cog. >>>>> >>>>> https://www.sheldonbrown.com/derailer-adjustment.html#chain >>>>> https://www.parktool.com/en-us/blog/repair-help/chain-length-sizing >>>>> >>>>> -Dave >>>>> >>>>> On Friday, October 18, 2024 at 1:46:30 PM UTC-4 Ray Varella wrote: >>>>> >>>>>> Just to clarify my understanding and perhaps anyone else who isn’t >>>>>> 100% clear, the Big/Big plus two links is done without the chain running >>>>>> through the derailer, right? >>>>>> >>>>>> Ray >>>>>> >>>>>> On Friday, October 18, 2024 at 10:32:05 AM UTC-7 Mike Godwin wrote: >>>>>> >>>>>>> I second Bill's method, has worked for me on all bikes for decades. >>>>>>> >>>>>>> Mike SLO CA >>>>>>> >>>>>>> On Wednesday, October 16, 2024 at 11:22:28 AM UTC-7 Bill Lindsay >>>>>>> wrote: >>>>>>> >>>>>>>> I always just use the St Sheldon method and use what I have to use, >>>>>>>> on whatever the bike. big+big+2 links. >>>>>>>> >>>>>>>> Bill Lindsay >>>>>>>> El Cerrito, CA >>>>>>>> >>>>>>>> On Wednesday, October 16, 2024 at 9:42:04 AM UTC-7 DavidP wrote: >>>>>>>> >>>>>>>>> My 60cm Platypus with 46t big ring and 34t big cog took 116+12 >>>>>>>>> links. I used two 116 link chains and two quick links and kept the >>>>>>>>> remnants >>>>>>>>> of the second one for future use. >>>>>>>>> >>>>>>>>> -Dave >>>>>>>>> >>>>>>>>> On Wednesday, October 16, 2024 at 11:03:05 AM UTC-4 >>>>>>>>> wesley.a...@gmail.com wrote: >>>>>>>>> >>>>>>>>>> A big ring like that up front is going to require a long chain. >>>>>>>>>> With 118 links, I've got just enough for a Homer running a 34/24 and >>>>>>>>>> something similar for the cassette. E-bike chains are a good shout >>>>>>>>>> for >>>>>>>>>> sure: https://kmcchain.us/collections/e-bike-9-speed/products/e9 >>>>>>>>>> On Saturday, October 12, 2024 at 9:50:48 AM UTC-5 >>>>>>>>>> fra...@gmail.com wrote: >>>>>>>>>> >>>>>>>>>>> I’m have been using a KMC 10 speed e-bike chain. 136 links. I >>>>>>>>>>> only removed 2 for my Clem with 34/24 rings and 11-42 cassette. As >>>>>>>>>>> an extra >>>>>>>>>>> bonus, they last forever! >>>>>>>>>>> >>>>>>>>>>> On Saturday, October 12, 2024 at 3:02:11 AM UTC-7 >>>>>>>>>>> okeeffe...@gmail.com wrote: >>>>>>>>>>> >>>>>>>>>>>> Hi, >>>>>>>>>>>> I was wondering what your experience with chain length was. >>>>>>>>>>>> Since RBW frames have pretty long chain stays, what length chain >>>>>>>>>>>> do you >>>>>>>>>>>> tend to run?. For information I'm using a 48-38 in front and 11-34 >>>>>>>>>>>> at the >>>>>>>>>>>> back on a '24 Sam. >>>>>>>>>>>> Cheers! >>>>>>>>>>>> Cormac >>>>>>>>>>>> >>>>>>>>>>>> -- 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 visit https://groups.google.com/d/msgid/rbw-owners-bunch/bfc41bc0-22dd-4c5b-bb29-ec4fb5af044bn%40googlegroups.com.
