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 <[email protected]> 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 [email protected]. > To unsubscribe from this group, send email to > [email protected]. > 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. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
