Mystery solved - it's the ID of the lock ring. The original Tange BBs came with an aluminum ring that measures nominally 23 mm ID where it contacts the cartridge. Shimano uses a plastic ring measuring 24.5 mm at the same point. Attempting to use the Tange lockring on a Shimano cartridge places an end load on the cartridge as the ring is tightened.
When I replaced the original, Riv installed BB on my Atlantis (after 5-6 years and 20,000 miles ??), I recall being wary of the plastic lock ring but figuring I'd use what came with the Shimano BB. I hung onto the original aluminum one "just in case". Yesterday I was attempting to re-use the Tange aluminum lockring with the new Shimano cartridge, hence the binding. So Shimano & Tange are interchangeable, but can't be mixed & matched. If the plastic lockring gives trouble I'll just file out the aluminum lockring to give clearance. dougP On Feb 14, 7:25 am, Jon Jandoc <j...@starfanglednut.com> wrote: > Did you check to make sure the bolt holding the cable guide under the bottom > bracket isn't interfering? > > Jon Jandoc > Los Angeles, CA > > On Feb 13, 2011, at 8:06 PM, doug peterson wrote: > > > > > Just puttering about with the new-to-us minilantis today & decided to > > check the BB. Bike is used, several years old but few miles. BB > > seems a bit "notchy" & not smooth like new. I have a spare, new > > Shimano UN 54 in 113 mm size. Pull the original & it's 116 mm Tange. > > Both for 68 mm shell. Pop in the 113 and the spindle binds when the > > lock ring is tightened. Weird. Put the 116 back in & no binding. > > Several iterations of removing & replacing, checking both units for > > differences, trying both offside rings (aluminum) with both BBs & I'm > > baffled. > > > When I replaced the BB in my 03 Atlantis a couple of years ago, I > > replaced the 116 with a 110, don't recall if Tange or Shimano but it > > just went in with no problems. > > > As far as I know, Tange & Shimano are interchangeable. What am I > > missing? I guess you're never too old to learn something new. > > > dougP > > > -- > > You received this message because you are subscribed to the Google Groups > > "RBW Owners Bunch" group. > > To post to this group, send email to rbw-owners-bunch@googlegroups.com. > > To unsubscribe from this group, send email to > > rbw-owners-bunch+unsubscr...@googlegroups.com. > > For more options, visit this group > > athttp://groups.google.com/group/rbw-owners-bunch?hl=en.- Hide quoted text - > > - Show quoted text - -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bunch@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
