Home

Am currently build up a 1974 Mercian as a Single Speed "about town" bike, new BB has landed but is really, really tight should my LBS have a tool to "ream"?
(Have tried Muckoff + Toothbrush + grease)

Si

7 comments

Avatar
Fringe [1047 posts] 7 years ago
0 likes

I'd find a local frame builder if i were you, they will have the know-how as well as the tools..

post a pic. when yer done sounds like a nice retro town bike. ta.

Avatar
cat1commuter [1422 posts] 7 years ago
0 likes

Are you sure your new BB has the correct sized threads?

Avatar
cat1commuter [1422 posts] 7 years ago
0 likes

Actually, you would only get this behaviour if the frame has a Raleigh bottom bracket shell and you're trying to fit a British/ISO BB. So it is unlikely that you have the wrong BB.

Avatar
dave atkinson [6295 posts] 7 years ago
0 likes

shouldn't cost you much to get your LBS to chase the threads and ream the ends. if the threads have rusted at all – not uncommon if the frame hasn't had a BB in for a while – then it'll need doing. don't force it!

Avatar
canyonsi [31 posts] 7 years ago
0 likes

Cheers guys

si

Avatar
bicycleworld [26 posts] 7 years ago
0 likes

The thread on your Mercian will be a 1.37x24tpi.
Which is the standard british frame thread.
Raleigh used to use a totally different thread.
Your Mercian will not use that thread.
We would charge about £15 to Tap & Face a frame.
So unless you are in the centre of London.
You may find a comparable price at your LBS.
They will definately have the tools & knowledge.

Avatar
canyonsi [31 posts] 7 years ago
0 likes

I guess it could be a good excuse to visit Grant at Mercian, although we have a newish LBS new me so might try him first.

Oh, Fringe, will post pic when complete.

si