[RBW] Re: Platy front derailleur with Riv wide-low double (39x28)?

As soon as I posted that last item I opened this gem that substantiates some of my suspicions about Shimano's intents. Lordy. I just want to ride my bike as an escape from other complexities. They are going to force me to call

[RBW] Re: Platy front derailleur with Riv wide-low double (39x28)?

Long cage designs are trying to make initial contact with the chain by the side plates at a place where the most effective use of lateral movement is. FD design to accommodate more gears on triples and integrated brake/shifters has to deal with both trim and rapid contact with the chain at a

[RBW] Re: Platy front derailleur with Riv wide-low double (39x28)?

I'm finding this thread more helpful than expected. I wanted to add this in order to simplify: "Front derailers don't generally care how many gears you have in back, though models designated for higher numbers of speeds may have slightly narrower cages , so they might be a bit more fussy in

[RBW] Re: Platy front derailleur with Riv wide-low double (39x28)?

I'm going to try one of Joe's vintage derailleurs next. Stay tuned. Thanks, Joe for the parts connection and the offer to help! Tom > > On Tuesday, May 25, 2021 at 9:27:10 AM UTC-4 Tom Wyland wrote: > >> OK, I'm still struggling to find a FD. I tried a Microsoft R9 and that >> didn't

[RBW] Re: Platy front derailleur with Riv wide-low double (39x28)?

Andy, I think you're onto something with the long tail of that particular mech. It appears to be a clone of the "9-speed" Shimano 105 that Riv used to spec on their triples 15-20 years ago, and they had a problem with them landing on the chainstay because of a combination of low BB (creating a

[RBW] Re: Platy front derailleur with Riv wide-low double (39x28)?

I meant too long, but I see what you're getting at here: The chainstay clearance might be what's preventing the small ring shift. SO..let's get a derailer mounted properly first, then we can see if the problem is solved before moving to spindle length  On Wednesday, May 26, 2021 at 1:23:48

[RBW] Re: Platy front derailleur with Riv wide-low double (39x28)?

Did you mean to say that the spindle may be too short? If the derailleur cage cannot move far enough inward, shortening the spindle will only make the situation worse. Agree with the rest. Laing On Wednesday, May 26, 2021 at 4:17:58 PM UTC-4 Joe Bernard wrote: > Two potential issues I see

[RBW] Re: Platy front derailleur with Riv wide-low double (39x28)?

Um, it seemed like the cage wouldn't clear the stay? Also it didn't appear to move far enough for the "low" gear when I pushed it all the way in. Maybe it could be modified. I could re-purchase it (LBS) and try again, I supposed. Seems like you're all saying that most of them should work.

[RBW] Re: Platy front derailleur with Riv wide-low double (39x28)?

Tom, what exactly is/was the problem with the Microshift you tried? Joe Bernard On Tuesday, May 25, 2021 at 6:27:10 AM UTC-7 Tom Wyland wrote: > OK, I'm still struggling to find a FD. I tried a Microsoft R9 and that > didn't seem to work. The local bike shop said 10 speed won't work with 9

Re: [RBW] Re: Platy front derailleur with Riv wide-low double (39x28)?

The Roadini had the "baseball bat" seat tube that flared at the bottom and took a large diameter FD (same as an early Clem), and I was just wondering if the Platypus was the same, which would eliminate a lot of 28.6 FDs. You can shim a large diameter FD down, but you cannot shim a small

Re: [RBW] Re: Platy front derailleur with Riv wide-low double (39x28)?

Its 28.6? It can be shimmed from a larger sized clamp. Tom Sent from my iPad > On May 26, 2021, at 7:30 AM, lconley wrote: > > What is the external diameter of the Platypus seat tube that the front > derailleur clamps to? > > Laing > Delray Beach FL -- You received this message because

[RBW] Re: Platy front derailleur with Riv wide-low double (39x28)?

What is the external diameter of the Platypus seat tube that the front derailleur clamps to? Laing Delray Beach FL On Tuesday, May 25, 2021 at 9:27:10 AM UTC-4 Tom Wyland wrote: > OK, I'm still struggling to find a FD. I tried a Microsoft R9 and that > didn't seem to work. The local bike

Re: [RBW] Re: Platy front derailleur with Riv wide-low double (39x28)?

Garth is right, you can use a road derailleur (or any other) and simply raise it high enough to clear the stay. I've done than many times with no shifting problems. On Tue, May 25, 2021 at 10:55 AM Garth wrote: > Tom it helps us readers to know what "doesn't seem to work", as in how ? > The

[RBW] Re: Platy front derailleur with Riv wide-low double (39x28)?

Tom, Have you tried a Shimano 9 speed Sora? Available as a double or triple. I have one of these (double) on a frame and it works fine. Friction shifting 7 cogs with a 46x34 in the front. Mine is shimmed but so far no issues. The number of front and rear derailers on the market today is indeed

[RBW] Re: Platy front derailleur with Riv wide-low double (39x28)?

Tom it helps us readers to know what "doesn't seem to work", as in how ? The road FD's that I've set up with 24/26 low rings have all shifted brilliantly. If the FD is hitting the frame raise it until it does clear, then test it by riding around wherever you are. The FD doesn't need to be as

[RBW] Re: Platy front derailleur with Riv wide-low double (39x28)?

Thanks, Pam. I'm in the DC area (Herndon, VA) but it's spring and all mechanics are booked. I'll ask Tim/Daniel at Bikes at Vienna when I can get there. I'm trying to do this build all by myself as a project. I would rather not order and return 5 FD if possible. Tom On Tuesday, May 25,

[RBW] Re: Platy front derailleur with Riv wide-low double (39x28)?

I have an older derailleur I got from the used bin at our Recyclery bike shop. Most old school derailleurs will work for friction. I don't even know the name of it. It's all metal. The newer derailleurs are sized for different tubing and it had a plastic shim that did not hold. Where are