Lefebeaver, I'll add to the chain questions with a shifter one: Are you using friction or index? Your problem on the second-biggest rear cog sounds like the pulley wheels are landing slightly off-center and towards the biggest cog, which would create that crunchy sound. Like you're going to get that crunch when shifting to the big cog, and the chain is already halfway there and crunching before you start the shift.
I've had this exact issue with an Altus and indexing, it's not a terribly precise derailleur for clicky-shifting. This theory is moot if you use friction and can't trim that sound out. Joe Bernard On Tuesday, June 22, 2021 at 6:59:32 AM UTC-7 Lefebeaver wrote: > My Atlantis is set up with an Altus, 24-34-44 up front, and 11-34 8-spd in > back. I set up the chain length according to guidelines I got from Riv, but > my Altus grinds on the second biggest gear in back when shifting to the > innermost one - it scrapes on the gear on its way up and makes a horrendous > noise, and although it'll run in that second gear, it's clunky so I rarely > use it, but the biggest gear works fine once you get up there. I'm > wondering if anyone else has had this issue - should I add some more links > to the chain? I ultimately wish to go bigger in back - was on a loaded dirt > road tour in Brazil where there were some hills I didn't have a low enough > gear to climb and I had to walk it up, while my companions on mountain > bikes just went grinding up in their 1X setups. Thinking I need to get a > goat link for that next step to a larger cassette in back; what is the > guidance for choosing chain length with a link? > > > On Monday, June 21, 2021 at 4:34:55 PM UTC-4 dougP wrote: > >> Same here. My Atlantis has a 24/34/44 triple, and the Altus handles it >> fine. IIRC, the Altus is less than $30 at Rivendell (if they have them to >> sell). >> >> dougP >> >> On Monday, June 21, 2021 at 6:01:46 AM UTC-7 Bill Schairer wrote: >> >>> I ran an Altus on my Atlantis with a 12-36 9 speed cassette and a >>> 42/34/19 triple for a week on the GDMBR and had no troubles other than >>> being laughed at by another cyclist for my selection of a rear derailleur. >>> What can I say - it worked. I decided to switch to the Altus for that ride >>> because I had it and it has amazing chain wrap, which I thought would be >>> desirable with that 19t granny. It has been two years now and it is still >>> on the bike. >>> >>> Bill S >>> San Diego >>> >>> On Sunday, June 20, 2021 at 8:51:11 PM UTC-7 Joe Bernard wrote: >>> >>>> What Doug said, it should be fine, Shimano rear derailers are usually >>>> good for pushing a couple teeth bigger than listed. I believe - this is >>>> math stuff I don't fully understand - some of the concern comes from if >>>> you're running a wide-range triple crank *and *a big cassette..at some >>>> point in there things get screwy. But most of us don't run triples that >>>> way >>>> and you may not even have a big ring, just guard-middle-small. I say give >>>> it a whirl! >>>> >>>> Joe Bernard >>>> >>>> On Sunday, June 20, 2021 at 6:20:31 PM UTC-7 Michael Baquerizo wrote: >>>> >>>>> bought a 11-36t cassette for my new appa and already have some altus' >>>>> that i'd like to use ( i guess i have back up shimano rear in case they >>>>> dont) but i realized it's supposed to be 34t max. anyone get it past >>>>> that? >>>>> tried looking elsewhere to no avail. >>>>> >>>>> keep seeing altus' on riv builds and it's growing on me aesthetically, >>>>> in a riv sort of way. my back up is an m952 xtr rear. not a huge fan of >>>>> the >>>>> charcoal color so i'm not super excited to use it, but i guess i can get >>>>> over that pretty quickly >>>>> >>>>> >>>>> -- 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/f80c6ee0-5b42-4d94-a447-a025f7917378n%40googlegroups.com.
