

Hi everyone, need a little help š cleaning up the bike and found that the front hook pushes the rear d inwards when folding. happening to one of them but not another.
Seeing that the front hook isnāt adjustable, is some amiss? Nothing seems bent out of shape. Been trying to figure it out!
by gominimal
2 Comments
This Brompton data sheet might help with troubleshooting:
Data sheet below give views of the necessary alignment for the hook,
https://trade.brompton.com/Uploads/QPart/QPart-Datasheets/ds-mgsfhook.pdf
Front hook
From your description, it is possible, the front hook position has changed a small amount, due to the front fenderās stainless steel wire stay becoming bent, which has caused the hook to catch against the derailleur.
See if the front fender stays should to be bent back into their position, a bit of trial and error.
Then it is recommended to apply a rubber bumper shown in the Reddit below. The rubber bumper will help keep the front hook in proper position by preventing bending distortion of the fender stay.
https://www.reddit.com/r/Brompton/s/El4cr8gYsD