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I have a bike with 105 triple crankset with 105 bottom bracket (Shimano 5500). If I upgrade to an Ultegra triple crankset, do I need to to replace the BB or will everything fit?
Second question, do the new ten speed Ultegra triple cranksets use the same bottom bracket: ie are 9 speed (my bike) and 10 speed cranksets the same thing?
Cheers.
rdk said:I have a bike with 105 triple crankset with 105 bottom bracket (Shimano 5500). If I upgrade to an Ultegra triple crankset, do I need to to replace the BB or will everything fit?
6500 (triple 6503) series will fit. See:
bike.shimano.comFront%20drive%20road%20compatibility.pdf.pdfOpen ↗
rdk said:Second question, do the new ten speed Ultegra triple cranksets use the same bottom bracket: ie are 9 speed (my bike) and 10 speed cranksets the same thing?
Not even close. The 6600 series are integrated/outboard bearing design (Hollowtech II) See:
bike.shimano.comcomponent.jspOpen ↗
Thanks. Great link to that compatibility chart. The three charts on this link bike.shimano.comroad compatibility.htmlOpen ↗
probably answer hundreds of questions on this and other forums.
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