You are reading a single comment by @crossedthread and its replies.
Click here to read the full conversation.
-
Again, got to hand it to you for knowing and sharing all this stuff :))
At least I know there’s potentially such a part (thought I was going round the bend.)
Also, will remember to set the Vernier to old money!
crossedthread-
Oversized Chater Lea BB which I think is what you are looking for https://www.ebay.co.uk/itm/114474065434
SideshowBob
If you had asked Mr. Chater-Lea (there was such a person) he would have said 'I think you mean an inch and three eighths'. That is the size of Chater BB cups, so you need the complete set - two cups, lock ring and spindle plus some 5/16th balls.
I can't tell you the part no. you'll need for the spindle, but I know that '1007' is standard width for use with a single chain ring, so that won't do for the tandem.
You might try The Tandem Club - I think they have some special tandem parts.