I'm not a mechanic or an expert. But I've set up two compact doubles in the past year:
- On my Hillborne: A SunXCD 42/24 with a Suntour Cyclone (Mark I) - On my MB-2: A TA Specialities 42/28 with a Suntour AR In both instances I had to run the derailer a lot higher than I thought I should to get the jump. It looked so wrong I almost abandoned the crank. But then I looked closely at other compact doubles and found FDs run higher than conventional wisdom dictates. The same was true when setting up an SR mixte, had to run the FD pretty high to miss the chainstay but it shifts fine. Your mileage may vary. On Monday, March 6, 2023 at 12:32:18 PM UTC-5 mmille...@gmail.com wrote: > Picked up a used CX70. Initial installation and quick ride is promising. > Slight rub on little ring, large in rear, but I don't think I've ever used > that combination. Thanks all for your thoughts. (mostly wanted to update in > case anyone else has issues.) TL:DR Triple bad, double good. > > [image: IMG_2415 Large.jpeg] > > On Saturday, February 25, 2023 at 7:50:02 AM UTC-6 Bill Schairer wrote: > >> I agree with Garth and Andy. I've got an old Campy shifting a 50/45/26, >> a Suntour AR or Vx (I can't remember which) shifting 42/34/19 on my >> Atlantis, and whichever isn't on the Atlantis is on my Trek shifting >> 45/42/24. I've also used Cyclones. It often takes a bunch of fiddling and >> trial and error - I've had derailleurs work well on one bike but not >> another so, as Garth said, having a choice of several on hand and doing >> one's own work is the best way to go. The old derailleurs are elegant, >> light, plentiful, cheap, and they just work. I picked one of the Suntours >> up for free from a bike shop parts bin, all it needed was a cable clamping >> screw. >> >> Bill S >> San Diego >> >> On Saturday, February 25, 2023 at 2:47:13 AM UTC-8 ascpgh wrote: >> >>> Shaped inner plates hate wide chainring choices, they're made for >>> corporate combinations to assure legal counsel of perfect shifting with >>> their derailleurs, shifters cassette combos and other spec. What I found >>> when building up my wide double (46/30) rando with RH cranks was that with >>> all the new FDs to try, my mechanic found the SunTour Superbe from my bag >>> of nearly NOS FD options fit and worked the best. Plus it doesn't try to >>> hide that it is made of metal, it is bright silver. >>> >>> A couple shots in album form: >>> >>> https://photos.app.goo.gl/eSqnCSt3WxrtfmkCA >>> >>> Tail of the cage not hitting the right chain stay, limiting how close to >>> the 46t ring it could be, chain line when on on the 30t not below the >>> intended interface of an origami inner plate sculpted for a very narrow >>> range of OEM chainring size combinations and a width of parallel cage >>> plates that permits operation across several cogs before trimming is >>> necessary. I'm quite happy with it. >>> >>> Andy Cheatham >>> Pittsburgh >>> >>> On Thursday, February 23, 2023 at 12:45:08 PM UTC-5 mmille...@gmail.com >>> wrote: >>> >>>> I've been having a heckuva time getting my front derailleur to go from >>>> little to big without hopping over. Eventually, if I talked sweetly to it >>>> and said Hail Mary three times, it would usually settle. Even took it to >>>> an >>>> experience mechanic. He also lowered it, then slowly kept raising it up, >>>> and also kept working the limit screw. A fraction of a turn was difference >>>> between not reaching the big ring, or going over! >>>> >>>> It's a White Industries VBC with 46-28. FD is IRD compact triple >>>> Aplina. Friction Microshift thumbie. I think it's bottom pull. >>>> >>>> [image: IMG_2391 Medium.jpeg] >>>> >>>> Any suggestions for different FD? May need different chain rings >>>> because of that big jump, but if I do that, I may be best off buying >>>> something else and selling these. >>>> >>>> Thanks, >>>> Matt >>>> >>> -- 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/afbac499-5f6f-4ad4-be20-2b7f58dadee5n%40googlegroups.com.
