You were on the right web site; you just didn't go far enough. For a discussion about bottom bracket interchangeability go to http://www.sheldonbrown.com/bbtaper.html
For a discussion about chain line, which you'll need to determine before selecting your BB spindle length go to http://www.sheldonbrown.com/chainline.html For a database of different BB manufacturers, their dimensions, and how they affect chain line go to http://www.sheldonbrown.com/bbsize.html 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 -~----------~----~----~----~------~----~------~--~---
