There's something up with my Brommie. It won't hold together folded. It was fine last light and this morning on the train but when I got to work it wouldn't hold in the folded position. What seems to be happening is that the seat-post isn't locking the rear triangle when it is fully down. Looking at the bike there is nothing to lock against and so I am concerned that something has fallen off. I heard a noise as I was coming in to work but I thought I'd cycled over something and it was that. I will cycle back to where I heard the noise but I don't know what I am looking for. Can any Brommie owners look at their folded bike and tell me what bit does the bottom of the seat-post lock against?
There's something up with my Brommie. It won't hold together folded. It was fine last light and this morning on the train but when I got to work it wouldn't hold in the folded position. What seems to be happening is that the seat-post isn't locking the rear triangle when it is fully down.
Assuming my Mk 3 is basically the same as others (including yours) in this respect...
There's a circular pad that lives close to the suspension rubber block and trolley casters. When you fold the back under this will be positioned just forward of the bottom of the seatpost tube, so when the bottom of the post pokes out the bottom of the tube it will rest against that pad and lock the fold.
That's from memory rather than the bike beside me, so ICBW.
HTH, Pete. -- Peter Clinch University of Dundee Tel 44 1382 660111 ext. 33637 Medical Physics, Ninewells Hospital Fax 44 1382 640177 Dundee DD1 9SY Scotland UK net [email hidden] dundee.ac.uk~pjclinchOpen ↗
In article <[email hidden]>, [email hidden] says...
Quoted message said:
There's a circular pad that lives close to the suspension rubber block and trolley casters. When you fold the back under this will be positioned just forward of the bottom of the seatpost tube, so when the bottom of the post pokes out the bottom of the tube it will rest against that pad and lock the fold.
Thanks Peter, that's spot on. That bit screws onto the back of the rear brake mounting---in fact it serves as the nut to hold the brake on so it is a bit more important than just losing foldability. I just cycled back to where I heard the tickle and I have recovered the bits. The metal nut/bolt bit is okay but the plastic disc is smashed. It just about holds the bike together without the disc but I think I'll have to get a new part.
Lesson? Check that all the bits are tightened regularly!
In message <[email hidden]>, Peter Clinch <[email hidden]> writes
Quoted message said:
Colin Blackburn said:
There's something up with my Brommie. It won't hold together folded. It was fine last light and this morning on the train but when I got to work it wouldn't hold in the folded position. What seems to be happening is that the seat-post isn't locking the rear triangle when it is fully down.
Assuming my Mk 3 is basically the same as others (including yours) in this respect...
There's a circular pad that lives close to the suspension rubber block and trolley casters. When you fold the back under this will be positioned just forward of the bottom of the seatpost tube, so when the bottom of the post pokes out the bottom of the tube it will rest against that pad and lock the fold.
That's from memory rather than the bike beside me, so ICBW.
I was just checking mine as this post came in....
On mine there is a plastic 'stop' mounted behind the rear brake caliper that seems to do this job, sounds like what you are talking about.
Piccie of the bike folded at (part circled in red):
There's something up with my Brommie. It won't hold together folded. It was fine last light and this morning on the train but when I got to work it wouldn't hold in the folded position. What seems to be happening is that the seat-post isn't locking the rear triangle when it is fully down.
Assuming my Mk 3 is basically the same as others (including yours) in this respect...
There's a circular pad that lives close to the suspension rubber block and trolley casters. When you fold the back under this will be positioned just forward of the bottom of the seatpost tube, so when the bottom of the post pokes out the bottom of the tube it will rest against that pad and lock the fold.
That's from memory rather than the bike beside me, so ICBW.
No, you are pretty close.
After a visit to 'behind the curtain in the hall" i can confirm that.....
This 'circular pad', about 1" in diameter, is in fact fastened to the rear of the rear brake bolt. When the folded bike is picked up the seatpost is forced against it, thus preventing unfolding. It looks as if after much use it could crack and fall off or perhaps become loose.
It looks as if after much use it could crack and fall off or perhaps become loose.
If it isn't adjusted properly the seat post will land on it when telescoped, and this may give it too much of a hard time.
The other thing to check when having folding problems is that the hook on the left of the front wheel hasn't been bent.
Tony. -- f.a.n.finch <[email hidden]> dotat.atdotat.atOpen ↗ SELSEY BILL TO LYME REGIS: NORTHWEST TO WEST 2 OR 3 LOCALLY 4 BECOMING VARIABLE 2 OR 3, THEN EAST 3 OR 4 LOCALLY 2. FAIR. GOOD. SLIGHT.
The other thing to check when having folding problems is that the hook on the left of the front wheel hasn't been bent.
And if the bars are too far forward (or is it back...) then they'll push against the wheel when folded and tend to pop out of the, umm, popper thing that usually keeps them in place. A few degrees rotation of the bars where they attach to the stem will solve that one.
Pete. -- Peter Clinch University of Dundee Tel 44 1382 660111 ext. 33637 Medical Physics, Ninewells Hospital Fax 44 1382 640177 Dundee DD1 9SY Scotland UK net [email hidden] dundee.ac.uk~pjclinchOpen ↗
