I have an E-type front derailleur mount. It's 3mm thick & uses a strange bottom bracket (Tange 68x110mm marked E-type).
Here's the E plate thingy the old BB goes through.
I'm eliminating the plate & OEM BB, getting a new front derailleur & Shimano UN-55 bottom bracket. What size do I get??
The original BB was an "E" model 68x110mm made to work with the 3mm thick funky plate. The OEM (Tange) BB looks like the drive side spindle might be recessed into the bracket flange a bit to compensate for the 3mm thick plate that went between the BB flange & the frame.
Do I get a UN-55 68x110mm, or a 68x113mm to use without the plate?