I just wrote a response to this but it did not appear, ??? I am using the Campy competition triple: http://www.lickbike.com/productpage.php?PART_NUM_SUB='0356-35'
RBW used to carry them but seem to have stopped. Why? Maybe the price increase, I don't remember paying that much for them. RBW has now replaced them with this shimano: http://www.rivbike.com/product-p/d14.htm As Eric wrote, typically front shifting deteriorates if the derailler is set to far above the big ring. When you go down to a 46 or 44 as I have, you can expect better performance by moving to a derailler that can go lower around the ring without hitting the chain stay. Michael On Sunday, April 22, 2012 8:40:32 PM UTC-4, BCDrums wrote: > > Michael, > > Which Campy front derailleur are you using? > > BC > > On Apr 22, 7:38 pm, Michael Hechmer <mhech...@gmail.com> wrote: > > What FD are you using? I certainly appreciate your desire to minimize > > front shifts. I switched back to a 44/30 double with the expectation I > > could reduce them, and I certainly have. But I also found that my 105 > > derailler wouldn't work across such a small front and so switched to the > > Campy, and as a result got such excellent front shifting that I no > longer > > give it much thought. Instead I pay more attention to front shifts in > the > > middle of the cassettes and having a nice straight chain line. I have > > also found that having a difference of 10 teeth is optimal, because it > > produces a simple shifting pattern - after shifting rings I am always > one > > cog from the next gear. But this combo lacks range and so only really > > works well in a triple. Experimentation has taught me that a difference > of > > twelve leaves me between gears and sixteen not only creates a very slow > > upshift but also requires searching for the next gear in the back. A > > difference of 14 seems to be a nice compromise, with a decent front > shift > > and two clicks in the back to the next gear. Often, in rolling terrain, > > that front shift gives me exactly the gear I want. > > > > Michael > > > > > > > > > > > > > > > > On Sunday, April 22, 2012 12:41:48 PM UTC-4, Patrick Moore wrote: > > > > > Thanks, Michael -- more questions below. > > > > > I should have been clearer that all of this rigmarole and these > questions > > > are premised on the desire to shift between rings as little as > possible. > > > Obviously, swapping out the 46/36/24 triple to a, say, 38/24 double > would > > > help greatly, but OTOH, the current triple has its own advantages, not > the > > > least of which it is already in place. The the question about using as > many > > > cogs as possible with the 46 and the 36. > > > > > On Sat, Apr 21, 2012 at 8:39 PM, Michael Hechmer > > > <mhech...@gmail.com>wrote: > > > > > >> On Saturday, April 21, 2012 9:28:47 PM UTC-4, Patrick Moore wrote: > > > > >>> 1. Is there any harm in riding the 46 up to cog #7? Note that this > hub > > >>> is an 8/9 speed hub with extra spacers behind the big cogs. There is > plenty > > >>> of chain and the derailleur cage is just for'ard of vertical when in > the > > >>> big cog -- ie, nothing is really stretched -- I deliberately added > extra > > >>> slack for this. > > > > >>> Not such a good idea, since the chain angle increases friction and > wear > > >> on the chain, rings and cogs. Besides, If you drop from the 46x22 > down to > > >> the 36 you will get the next gear, a better gear spacing, and a > straighter > > >> chain line all the way down to 31. > > > > > Is this because of the inward position of #7, or because of its size? > Note > > > again that the 34 (or the 29) is in effect the third ring from the > inside > > > since I installed only 7 cogs out of a possible 9. Once again, there > is > > > plenty of chain slack. Second opinion, then, about the 46/34? > > > > >> 2. Can I use the 36 with cog #1? > > > > >>> Why not? It will work OK, but if you're going to be there for a > long > > >> time, the 46x20 will be a little better. > > > > > Good to know. Most of my dirt riding is in our river valley bosque > which > > > is pancake flat except for the occasional steep, short grunt up onto a > > > levee, so the 46 provides ample range (this is the context for that > "46/34" > > > question). But if I ride in dirt in hillier terrain -- say in Rio > Rancho's > > > sand hills and in the east mountain foothills -- the range on the 36 > will > > > be very desirable. > > > > >>> BIG APPLES KOJAKS *46* 36 24 *46* 36 24 16 83 65 15 83 65 18 > 74 > > >>> 58 17 73 57 *20* *67* 52 *18* *69* 54 22 61 47 32 19 65 51 34 > 26 51 > > >>> 40 27 21 59 46 31 30 44 35 23 24 52 41 27 34 39 31 20 29 43 34 22 > > >>> I am still debating whether one of these has any real advantage for > me: > > > > >>> 36 24 38 24 11 88 12 92 12 81 13 85 13 75 14 79 14 69 > 16 > > >>> 69 16 61 17 65 19 51 34 20 55 35 23 44 28 24 46 29 29 35 23 > 28 > > >>> 39 25 34 30 20 36 31 19 > > > > >> The 12 will last longer than the 11 and you have more useful gears > off > > >> the 24 than you are showing. You will need a short cage FD, like the > > >> campy, to make this work without running the derailler into the chain > stay, > > >> and still be close enough to a 38 to shift smoothly. > > > > > If I do switch to a double, it will very likely be with a 38 and a > small > > > cog of 12. I'll have to play with the current (LX?) fd. For one thing, > the > > > whole point of this exercise is to decrease fd shifting; second, I > intend > > > to install a bash guard in the outer position; and third, I rarely use > the > > > granny in the conditions I ride in: the hills are short enough that I > stand > > > and grunt or, if sand is involved on hill or flat and I can't power > through > > > it in a 50- or 60- something gear, it is usually too deep to allow > shifting > > > into the granny: by the time I manage the shift, I've bogged and fall > over. > > > (So to speak.) Also, I am sure I will be grateful for it if I ever > tour. > > > > > Fun stuff, this gearing nonsense! If I bore y'all with it, enter a > > > subscription to collect enough to buy me a nice ss 29er. > > > > >>> Don't wait up for me: I have been a gear nerd, freak, obsessive, > fanatic > > >>> for over 20 years despite fixed gear riding and I love the subject. > Frank > > >>> Berto has nothing on me. > > > > >>> Patrick Moore, who does actually ride his bikes and just had a > > >>> wonderfully pleasant and fast 20 mile dirt ride (flat) on the Fargo > in the > > >>> 46X20. > > >>> -- > > > > >>> ------------------------- > > >>> Patrick Moore, Albuquerque, NM > > >>> For professional resumes, contact Patrick Moore, ACRW > > >>>http://resumespecialties.com/**index.html< > http://resumespecialties.com/index.html> > > >>> ------------------------- > > > > >>> A billion stars go spinning through the night > > >>> Blazing high above your head; > > >>> But in you is the Presence that will be > > >>> When all the stars are dead. > > > > >>> Ranier Maria Rilke, Buddha in Glory > > > > >> -- > > >> You received this message because you are subscribed to the Google > Groups > > >> "RBW Owners Bunch" group. > > >> To view this discussion on the web visit > > >>https://groups.google.com/d/msg/rbw-owners-bunch/-/9mxwbdBI6z4J. > > >> To post to this group, send email to > rbw-owners-bunch@googlegroups.com. > > >> To unsubscribe from this group, send email to > > >> rbw-owners-bunch+unsubscr...@googlegroups.com. > > >> For more options, visit this group at > > >>http://groups.google.com/group/rbw-owners-bunch?hl=en. > > > > > -- > > > > > ------------------------- > > > Patrick Moore, Albuquerque, NM > > > For professional resumes, contact Patrick Moore, ACRW > > >http://resumespecialties.com/index.html > > > ------------------------- > > > > > A billion stars go spinning through the night > > > Blazing high above your head; > > > But in you is the Presence that will be > > > When all the stars are dead. > > > > > Ranier Maria Rilke, Buddha in Glory -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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