JT Do you ride up to the peak in the 42-19 gear? I live a couple of miles from base of Mt Diablo on the Danville side but was always afraid to ride up on my low 44-19.
AD On May 8, 10:05 pm, Jeremy Till <jeremy.t...@gmail.com> wrote: > I'd agree that chainline doesn't need to be nuts on on a singlespeed > setup, but for fixed gear riding, especially on rough ground (paved or > no), having a chainline that's within 2-3mm is important, not so much > for efficiency as for preventing the chain coming off under high RPM > pedaling. Had that happen a few times due to bad chainline and it's > not fun. > > My multi-gear derailer-less setup uses a Salsa Casseroll frame (nice > long, sloping, front opening, horizontal dropouts) with a single 42t > chairing (on the inboard shoulder of a sugino xd double with a shimano > 107mm BB), and a Phil QR flip-flop with a 17-19t dingle fixed cog and > a 22t bailout/downhill freewheel. The chainline is setup so the > chainring is just between the chainlines of the two dingle cogs > (around 40mm, IIRC). On the dingle cog the two cogs are even closer > together than on the DOS freewheel, from what I've seen--Surly > recommends (and I use) a narrow 9spd chain. So chainline isn't perfect > there but it is close enough. > > Been using this setup or something similar for a few years now and > really like it. Last weekend I rode it up Mt. Diablo in the 42-19 > gear, flipped to the freewheel to bomb the descent, and then back to > the 42-17 fixed at the bottom for the ride back to the BART. A good > samaritan saw me on the side of the road and asked if i was all right, > and I replied "I'm fine, just shifting gears!" > > On May 8, 7:38 pm, "Bill Gibson (III)" <bill.bgib...@gmail.com> wrote: > > > > > Chainline is not an issue, unless you are a mid-century Brit... I run stock > > chainrings, 32/40 and the 17/19 Dos. The limitation on the Quickbeam is my > > Berthoud fender stays, which, strictly speaking, is not a Quickbeam issue. > > They could be longer, to let me use the whole range. Low-profile fasteners > > and a flaring fenderline allow me to use all the combos, but I rarely do. I > > gut things out. Huh. No problem climbing South Mountain in Phoenix, but soon > > I will build a wheel and play with an SRAM 9-speed internal hub... summer > > fun... seriously, you feel drag on the chainline? What about my internal > > gear friction box? Please, get an ergometer or some sort of watt-o-matic > > meter, and quantify that drag! Chainline is an aesthetic issue, not a drag, > > son. Humph... (Please don't get mad, I'm just playin'...) > > > On Sun, May 8, 2011 at 5:34 PM, charlie <charles_v...@hotmail.com> wrote: > > > It doesn't appear to me that the chain drag would be that > > > noticeable......are you using a regular 8-9 speed chain? > > > > On May 8, 11:58 am, Ron MH <visio...@gmail.com> wrote: > > > > This question is to all. How does the fixed gear side chainline work > > > > out with the various combinations you use? I ask because the fixed > > > > gear chainline on my Quickbeam sucks and the drag/lack of efficiency > > > > is easy to feel. I'm running the stock bashguard/40/32 Sugino triple > > > > combination and a 16t fixed cog in back. The chainline on the 40x16 > > > > fixed combination is more than 5mm off (the cog being inboard of the > > > > chainring). And the fixed setup is much more "draggy" than the 40x16 > > > > freewheel combination on the other side when using the 16-19 White > > > > Industries DOS freewheel. Of course, that's because the DOS freewheel > > > > places the 16t cog further outboard. The whole issue has me about to > > > > ditch the Sugino triple in favor of a decent single speed crankset. > > > > > Ron > > > > > On May 8, 8:50 am, A D <deguzman.al...@gmail.com> wrote: > > > > > > On my Simpleone I have a dos 16/19 on the freewheel side and a 17/19 > > > > > surly dingle cog on the fixed side. In front I have 44/48 rings on > > > > > the front. I use the 48/16 when I commute and ride down to Rivendell > > > > > and change gears to 44/19 when I go back home which is mostly > > > > > uphill. I usually flip to the fixed side on weekend rides when I > > > > > don't have anywhere to be. > > > > > > I haven't tried the extremes of the gears but the dropouts on my > > > > > prototype appear long enough. > > > > > > There is just something about the Qb/SO that feels so right. I can't > > > > > figure it out but it has me considering picking up an AHH even though > > > > > I have an Ebisu AR. > > > > > > On May 7, 6:54 pm, Robert Harrison <rfharri...@gmail.com> wrote: > > > > > > > My QB has a 40/32 in front and the 16/19 in the rear. It also has a > > > solo 22 back the which does come in handy when laden down with camping > > > gear > > > and facing a couple of hills around here. In town I tend to run 40/19 > > > because I can get "off the line" faster in traffic. Once out on the open > > > road it's back to 40/16. > > > > > > > Not thinking about what gear I'm in is great. During the week I'm in > > > commuter mode, on weekend it's open road mode and maybe once a quarter I > > > camp. > > > > > > > Aloha, > > > > > > > Bob > > > > > > > Sent from my iPad > > > > > > > On May 7, 2011, at 11:00 AM, newenglandbike > > > > > > <matthiasbe...@gmail.com> > > > wrote: > > > > > > > > It is a cool concept, made even cooler, IMHO, by the copious > > > > > > > length > > > of > > > > > > > the QB dropout. It's about 2". So, whereas with the WI > > > 'double/ > > > > > > > double', you get to choose between front rings 3-teeth apart, the > > > > > > > extra length of the Rivendell dropout gives you a mind-boggling > > > span > > > > > > > of 8 teeth to play with on the front rings-- and with the 16/19 in > > > the > > > > > > > rear, you can make that up to 11 teeth diff up front. Dang. > > > > > > > > So basically, you can run a 16/19 in the rear, and a 40/32 double > > > up > > > > > > > front, which comes stock with the new Simple One I believe. Then > > > you > > > > > > > put a 22t ACS f/w on the other side, and suddenly derailleurs > > > > > > > start > > > to > > > > > > > look quaint.* > > > > > > > > -Matt > > > > > > > > *OK not really > > > > > > > > On May 7, 4:50 pm, andrew hill <neurod...@gmail.com> wrote: > > > > > > >> Has anyone run a White Industries "Double/Double" drivetrain > > > > > > >> setup > > > on their Quickbeam? > > > > > > >> Or maybe has plans to on their SimpleOne? > > > > > > > >> Seems like a nice combination - rear Duo freewheel of 16/19, and > > > front of either 38/35 or 34/31. > > > > > > > >> They suggest the 38/35 for a 26" mtn bike, and the 38/35 for a > > > 29'er... but it seems to me that the 38/35 would be best for a 700c mostly > > > on-road riding bike. > > > > > > > >> Am I confused? e.g. 38/16 and 35/19 seem like they would be > > > better than 31/19 and 34/16... > > > > > > > >> Anyone try this yet, or have a thought as to why this wouldn't be > > > a great idea? :) > > > > > > > >> Best, > > > > > > >> andrew > > > > > > > > -- > > > > > > > You received this message because you are subscribed to the Google > > > Groups "RBW Owners Bunch" group. > > > > > > > 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 athttp:// > > > groups.google.com/group/rbw-owners-bunch?hl=en. > > > > -- > > > You received this message because you are subscribed to the Google Groups > > > "RBW Owners Bunch" group. > > > 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. > > > -- > > Bill Gibson > > Tempe, Arizona, USA -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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