My first feeling is that anything with a newer spring will be a bit stronger. The Deore m592 comes to mind. I've been running one for about 5 years without issue, and they're still available out there. If you're wanting to shell out, I would recommend the predecessor, the XTR M952, which has a tension adjustment screw.
Nick in Falls Church VA On Friday, July 11, 2025 at 8:39:18 PM UTC-4 Jason Hartman wrote: > Forgot the picture and sign off > > Jay Hartman > > On Fri, Jul 11, 2025 at 8:34 PM Jason Hartman <[email protected]> wrote: > >> Many models of Shimano derailleurs have adjustable cage springs. Here’s a >> picture of an xt 750 showing the two holes. The hole on the left is for low >> tension >> And the other is for higher >> >> On Fri, Jul 11, 2025 at 3:42 PM J Schwartz <[email protected]> wrote: >> >>> Thanks all >>> Yes I think that my old LX is both worn out and just a light action >>> spring. >>> Would a newer 9-speed XT or Deore be any better ...or just the same >>> thing >>> I would consider a clutch if so. >>> I'm not worried about my chain stays,...they are already >>> pockmarked...it's just the instability of the whole thing and the slapping. >>> I don't think I can take out any more links..it's not the chain length. >>> Are there any indexed 9-speed Shimano clutch derailleurs ? >>> >>> >>> >>> On Friday, July 11, 2025 at 5:55:59 AM UTC-4 Eric Daume wrote: >>> >>>> I agree with Garth that any non-clutch derailleur won’t make a big >>>> difference. >>>> >>>> But after riding modern parts, chain slap really annoys me. My off road >>>> bikes get clutch derailleurs. >>>> >>>> Eric >>>> >>>> >>>> On Friday, July 11, 2025, Garth <[email protected]> wrote: >>>> >>>>> I doubt a new RD is going to offer any less slap. To me the relatively >>>>> light spring action is part of modern indexed shift design, so the chain >>>>> moves across the cogs with ease. Shimano brand at least, I can't speak to >>>>> other brands. Use anything as a chainstay protector, even wrap an old >>>>> inner >>>>> tube. Clear racers tape cut to fit will stick well. >>>>> >>>>> My experience with modern RD's is with the Deore LX M581 I've had on >>>>> my Bombadil. Slap happy since day one. I just wrapped some old inner tube >>>>> around it. The floppiness has never caused the chain to change gears or >>>>> anything like that, it just alarming at first, but doesn't hurt anything. >>>>> On Thursday, July 10, 2025 at 8:43:05 AM UTC-4 Joe Bernard wrote: >>>>> >>>>>> Either of the derailleurs you listed will work fine. I agree with >>>>>> your thoughts about buying new, it's possible your old LX mech has a >>>>>> soft/worn spring and the pulley cage is letting the chain bounce a lot. >>>>>> >>>>>> Joe Bernard >>>>>> >>>>>> On Wednesday, July 9, 2025 at 1:45:27 PM UTC-7 J Schwartz wrote: >>>>>> >>>>>>> Greetings >>>>>>> >>>>>>> I have a 55cm Appaloosa and currently use an older but good >>>>>>> condition rapid rise Deore LX as the rear derailleur. It's 9 speed >>>>>>> with a >>>>>>> 9 speed Alivio trigger shifter. There is a lot of chain slap and I'd >>>>>>> like >>>>>>> to just replace it with a nice but basic, non-clutched, rear derailleur >>>>>>> that will keep the chain appropriately taut....given the long stays. >>>>>>> Casette is Shimano 12-36 9-speed and triple crank up front with a >>>>>>> 43t big ring, 35t middle and a 26t granny. >>>>>>> Would the current Alivio 9 speed >>>>>>> <https://www.rivbike.com/products/zzz4644hsh44fh4>that Riv sells do >>>>>>> the trick? I was also looking at some 9-speed era XT derailleurs on >>>>>>> eBay >>>>>>> but would rather just put something on that is new and not priced like >>>>>>> a >>>>>>> collectors item. What about a Microsoft Marvo 9-speed MTN >>>>>>> <https://www.microshift.com/models/rd-m46l/> ? >>>>>>> >>>>>>> [image: 67875621328__D1191EA7-0838-45A3-A6F5-3C6250736B38.JPG] >>>>>>> [image: IMG_0384.JPG] >>>>>>> [image: IMG_3466.jpg] >>>>>>> >>>>>> -- >>>>> 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 visit >>>>> https://groups.google.com/d/msgid/rbw-owners-bunch/7cd65667-0ea7-49b5-a2f8-3d00f5a1162cn%40googlegroups.com >>>>> >>>>> <https://groups.google.com/d/msgid/rbw-owners-bunch/7cd65667-0ea7-49b5-a2f8-3d00f5a1162cn%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>> . >>>>> >>>> -- >>> 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 visit >>> https://groups.google.com/d/msgid/rbw-owners-bunch/90993510-4ed1-4eaf-b4fc-0d8229c062e0n%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/rbw-owners-bunch/90993510-4ed1-4eaf-b4fc-0d8229c062e0n%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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