I don't know what hub you will be using, but if by chance it is a Rohloff hub (it is an expensive bike, I understand), you should know that these suppose an mtb chainline, where the one and only chainwheel is in the outer position of an mtb chainset. So for a perfect chain line, the bottom bracket length should be the same as when you were to use the Sugino as a triple. Willem
On 3 nov, 20:18, esaner <[EMAIL PROTECTED]> wrote: > Thanks. This is helpful. I hadn't read Sheldon's page on tapers, > though I already knew that this Sugino crank is designed for JIS > taper. Sheldon also doesn't address the terms short taper, low > profile, or compact on the page...frustrating. I had looked through > the bottom bracket size chart before, but it's not helpful since the > chart assumes the crank is being use as as triple, so it gives the > measurements I've seen elsewhere (anywhere from 107-115mm). > > It's good to know, Andrew, that you've already done with out any > problems what I'd like to do. I still find it odd, though, that these > terms are out there, but no one has really addressed them. Does the > term short taper simply mean that the taper is shorter, and thus the > crank bolt is in contact with fewer threads in the spindle? I'm not > sure why that would be necessary or beneficial. > > -Eric > > On Nov 3, 2:05 pm, Andrew Karre <[EMAIL PROTECTED]> wrote: > > > I've done this, actually, and it works fine. I've used a couple of non- > > PW 103 mm BBs w/ the XD as well as a a PW 103 with a Suntour XC Pro > > used as a double.I find 103 to be a handy BB for lots of double > > cranks. > > > AK > > > On Nov 3, 12:31 pm, esaner <[EMAIL PROTECTED]> wrote: > > > > I'm installing a Sugino XD500 triple crank on a new custom frame. I've > > > taken off the inner two chainrings and will be using the crank with > > > just the single 48t outer chainring. I installed a temporary bottom > > > bracket in the frame to measure how short of a bottom bracket spindle > > > I can use so as to achieve the smallest Q-factor (tread). The > > > temporary bottom bracket has a 115mm spindle. Based on my > > > measurements, I should be able to get by with a 103mm spindle. > > > > I would like to use a Phil Wood bottom bracket and their 103mm version > > > is listed as "short taper." I haven't been able to find a clear > > > definition of what this means. There is confusing information > > > especially on the Harrisy Cyclery web site, which seems to use the > > > terms "short taper" "low profile" and "compact" interchangeably when > > > describing bottom brackets of this type. Sheldon describes low profile > > > cranks here:http://www.sheldonbrown.com/cranks.html, and my > > > understanding of the term compact crank is that it refers to cranks > > > with 110/74 bcds. I'm also pretty sure that this has nothing to do > > > with difference between JIS and ISO tapers. > > > > So my questions (finally) are: > > > > What exactly is a short taper bottom bracket? (there is an obvious > > > answer based on its name...i'm looking for a more technical answer). > > > > What types of cranks can be used with it? > > > > What is the relationship between the terms short taper, low profile, > > > and compact? > > > > Can a short taper bottom bracket be safely and appropriately used with > > > a Sugino XD crank? > > > > Will a Sugino XD crank fit differently on a short taper bottom > > > bracket, such that I will need to re-think my measurements? > > > > Lots of questions! Thanks for all your help. > > > > -Eric --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Bicycle Lifestyle" 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/bicyclelifestyle?hl=en -~----------~----~----~----~------~----~------~--~---
