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 -~----------~----~----~----~------~----~------~--~---
