I want some idea in advance of how much more I need to file the dropouts.
On Fri, Dec 20, 2013 at 8:41 PM, dougP <[email protected]> wrote: > Patrick: > > So you've given up the Dremel for hand files? Good call! To your > questions, I'm clueless. Why not just ride it until your Park tool says > "replace"? > > dougP > > On Friday, December 20, 2013 5:03:22 PM UTC-8, Patrick Moore wrote: >> >> Yeah, if one is uptight enough to worry about gears when all you ride is >> fixed/ss, then one does have a problem. >> >> Back in the day, I used (he blushingly admitted) to print out little gear >> charts and tape them to my stem, and stare at them lovingly as I rode. In >> boring staff meetings, I'd "manually" work out gear combos on my doodle >> pads. >> >> Seriously, if you can believe that, a knowledge of gearing, if you care >> to take the trouble to acquire it, makes cycling just a little bit more >> fun. I "know", in a very bodily-conscious way, what "70 gear inches" means >> for a given bike, tires, load, incline, wind, surface, etc etc etc. And, if >> you bother to use multiple gears, you can multiply this satisfaction by N, >> where N is the number of usable and non-duplicate gears on your drivetrain. >> >> My brother, Peter, is just the opposite: he slings on a cassette that he >> picked up cheap and slings on a crankset that he picked up cheap and just >> rides what feels comfortable until it is no longer comfortable, then >> changes. He gives no damn at all about what cog combos he has. >> >> We are complete opposites in so many different ways -- he a hoarder and a >> slob, me a "throw it away goddammit!" and a fussbudget. >> >> O Freud, where is thy slip? >> >> >> On Fri, Dec 20, 2013 at 5:54 PM, Peter Morgano <[email protected]>wrote: >> >>> Patrick, you are an inspiration for me... to keep buying IGH hubs and >>> learn nothing about gear inches, haha.! :-D >>> On Dec 20, 2013 7:50 PM, "Patrick Moore" <[email protected]> wrote: >>> >>>> I've bitched and moaned on this list about the annoying position of the >>>> retrofit Campy 1010s on the '03 Curt (installed by local builder Dave >>>> Porter some 6-7 years ago), that, with my preferred ring-and-cog combos, >>>> leave the axle at the 1/2 or even the 3/5 point along the dropouts in the >>>> cruising cog, so that I am limited to another 2 teeth before I run out of >>>> dropout room. Since I lika-da-Dingle, this has limited me to a 17/19 >>>> instead of the 17/20. >>>> >>>> (Tho' I found after grudgingly installing the 17/19 that the 19/63" is >>>> the perfect chugging-along gear for extended hills and headwinds when I am >>>> carrying a heavy load.) >>>> >>>> I talked to other local builder Chauncey Matthews about re-positioning >>>> the dropouts, but he was reluctant to undertake the job, so after much >>>> fretting and internal anguish, today I took big and small rattails and a >>>> flat file to them and laboriously filed them back by a couple of mm. >>>> >>>> Lo and behold, a very little horizontal distance takes up a >>>> heckuvalotta chain slack. The axle is now within a mm of the back-end of >>>> the dropout in the 48/17, and there is ample room for, not only a 20, but, >>>> I daresay, even a 22 or 23. Not that my mighty quads need such piddling >>>> gears. >>>> >>>> I may have to file the dropouts back another mm or so to take up chain >>>> slack as the chain "stretches", but that should be no problem. The backend >>>> of the dropouts is noticeably thinner now, but there is ample metal to >>>> support the axle. >>>> >>>> I had to do the same thing to the '99 Joe gofast when I got it in '99, >>>> since I had -- thou fool! -- neglected to specify long dropouts and got >>>> Riv's then-current short horizontals. But the file did its work and the >>>> gofast can take a 5-tooth jump: I've installed a 20 t (or was it a 21?); >>>> the crusing 75" is a 46/15. >>>> >>>> All of this leading up to a couple of questions: >>>> >>>> 1. How much linear "stretch constitutes sufficient chain wear to >>>> require replacing the chain? (I use a Park tool, and I've found that, on >>>> the '99 Joe, when I just begin to notice that I cannot any longer take up >>>> sufficient slack, the tool measures close to 100% worn. So the dropouts >>>> make up a kind of on-bike chain check setup.) It can't be more than a very >>>> few mm. >>>> >>>> 2. Is it true, or is it false, that the lateral movement of the axle as >>>> you move it back and forth to accommodate smaller and bigger cogs, is 1/2 >>>> the distance that would be required if the chain were a mere single run, >>>> instead of being the double run it is? My head can't wrap around this one >>>> enough to picture the results of looping the chain versus a single line of >>>> chain. (That question makes sense to me, buddy.) >>>> >>>> 3. Is there a formula to convert linear axle movement to vertical chain >>>> deflection? That is: if I measure 1 3/4? of chain sag from the horizontal, >>>> then pull the axle back so that the chain is now horizontal (I know that >>>> this term is inexact), is there a formula that will tell me how much the >>>> axle will move laterally? >>>> >>>> (For Steve P.: Steve: it's *great* fun filing away energetically with >>>> crude hand tools at a $3,500 custom frame!) >>>> >>>> Patrick Moore, who would be at a total loss if he hadn't such trivial >>>> esoterica to fret about, in Burque, NM. >>>> -- >>>> *RESUMES THAT GET YOU NOTICED!* >>>> Certified Resume Writer >>>> http://resumespecialties.com/index.html >>>> [email protected] >>>> http://www.linkedin.com/in/patrickmooreresumespec/ >>>> >>>> Albuquerque, NM >>>> >>>> -- >>>> 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 post to this group, send email to [email protected]. >>>> Visit this group at http://groups.google.com/group/rbw-owners-bunch. >>>> For more options, visit https://groups.google.com/groups/opt_out. >>>> >>> -- >>> 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 post to this group, send email to [email protected]. >>> Visit this group at http://groups.google.com/group/rbw-owners-bunch. >>> For more options, visit https://groups.google.com/groups/opt_out. >>> >> >> >> >> -- >> *RESUMES THAT GET YOU NOTICED!* >> Certified Resume Writer >> http://resumespecialties.com/index.html >> [email protected] >> http://www.linkedin.com/in/patrickmooreresumespec/ >> >> Albuquerque, NM >> > -- > 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 post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/rbw-owners-bunch. > For more options, visit https://groups.google.com/groups/opt_out. > -- *FOR A RESUME THAT GETS YOU AN INTERVIEW, CONTACT:* http://resumespecialties.com/index.html [email protected] http://www.linkedin.com/in/patrickmooreresumespec/ Certified Resume Writer Albuquerque, NM -- 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 post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/groups/opt_out.
