Amen. I run 9sp chains across all bikes except the 8sp bike, which is doomed. In 15 odd years of fixed gear riding, "Sure that looks okay" has been fine. The few times I've ended up with 1/8" gear, I've killed it with fire. That's like running DOS in a production environment. My Phil singlespeed mountainbike wheels are also trouble-free with a "yeah, that looks fine" chainline.
YMMV: I don't use a gram scale to measure my coffee, either. Philip www.biketinker.com On Wednesday, February 22, 2017 at 8:13:53 AM UTC-8, Eric Norris wrote: > > If you’re running a road (multi speed) chain on your QB, this is all moot > anyway. Road chains are designed to work at a variety of angles as you > shift from on cog to another and one chainring to another. > > There is perhaps a theoretical increase in efficiency from having a chain > running perfectly straight, but I don’t have the time or energy to worry > about that on my bikes. > > --Eric N > [email protected] <javascript:> > www.CampyOnly.com > Campyonlyguy.blogspot.com > @Campyonlyguy > > > On Feb 22, 2017, at 8:09 AM, iamkeith <[email protected] <javascript:>> > wrote: > > Wally, > > If I understand your question correctly, you're thinking about moving the > chain outward to match the chainline of the Phil hub, by using a front > chainring in the outer position instead of the middle position that > Quickbeams used orginally? That 'might' work fine, but it's not the > easiest way to solve this. Forgive me if I'm over-stating the obvious, but > think about it this way: > > The bike itself has no inherent chainline. The chainline is determined > by the position of the cog on the rear hub, assuming that can't be > adjusted. So you want to match that chainline by moving the chainring > laterally as necessary, until it's the same or close to that of the hub. > The EASIEST and cheapest way to do this is to get a different bottom > bracket. Going longer, which it sounds like you need, won't cause any > clearance issues between chainring or crank arm and chainstay, but going > the other way sometimes can. > > So for instance: If you currently have a 110mm bb and a 42mm chainline at > the middle chainring position, and want to achieve a 46mm chainline, then > just get a 118mm bb or whatever is close. Both crank arms are just moved > outward by 4mm, and then you could keep the chainguard. > > If you got a Phil bb (though that wouldn't be the "cheapest" any more - > especially if you have to buy the proprietary tools, too), you can then > even micro-adjust to make the chainline 100% perfect - though a mm one way > or the other really shouldn't be an issue. > > > On Wednesday, February 22, 2017 at 5:25:40 AM UTC-7, Wally Estrella wrote: >> >> HI Ted: >> >> the chainline on the QB is 42, from what I've read, the chain line on a >> PW freewheel track hub is 46. So, yeah, I guess that's what I'm >> confusingly asking. Would there be any clearance issues w/ a 46 chain line >> and going up larger on either the chain ring or cog as? Sorry, just >> overthinking the simplicity of it. Sounds like it'll work just fine, so >> I'll just do it. >> >> Thanks! >> >> >> >> >> >> >> >> >> On Tuesday, February 21, 2017 at 9:33:19 PM UTC-5, ted wrote: >>> >>> Hey Wally, >>> >>> Im not clear on what you are concerned about, and my bike is a SO >>> instead of a QB, but I've got a 44t ring at ~42mm chain line on a short >>> (107?) PW bottom bracket. No problem with clearance, if that helps at all. >>> >>> On Tuesday, February 21, 2017 at 11:24:21 AM UTC-8, Wally Estrella wrote: >>>> >>>> Hi Folks: >>>> >>>> I've seen numerous pictures of QBs with Phil Wood hubs on them, but >>>> can't recall if it was fixed or freewheel. From what I understand the >>>> fixed side of the PW track hub is 42. The freewheel hub is 46. >>>> >>>> Is 46 chainline on a QB an issue from dropout to BB/chain stay >>>> clearances? I'm using a single ring up front @ 40t ring and thinking of >>>> upping it to a 44 w/ a new PW freewheel on the rear. >>>> >>>> >>>> Thanks, >>>> Wally >>>> >>> > -- > 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] <javascript:>. > To post to this group, send email to [email protected] > <javascript:>. > Visit this group at https://groups.google.com/group/rbw-owners-bunch. > For more options, visit https://groups.google.com/d/optout. > > > > -- 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 https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
