Brompton lower stop disc set - MK 3 - QLSDA

Brompton lower stop disc

The lower stop disk keeps the rear wheel locked in place in conjunction with the seat post when the Brompton is folded

Using the thread / locknut it can be adjusted to get the optimal position 

If the gap between the seatpost and lower stop disc is too small, then the seatpost will catch / rub on the lower stop disc when raised lowered

if the gap between the seatpost and the lower stop disc is too big then the frame hook (on the front forks) which keeps the bike folded may come un-hooked when you pick up the folded Brompton. We have found this doesn't happen too much. What tends to happen more is that the locknut works loose and the lower stop disk falls off!

The lower stop disc (or LSD) assembly supplied here is a Mk 3 type (we have never actually seen a Mk1 or Mk2 - as the Mk3 has been around for such a long time)

It can be used equally well as a replacement on your bike already fitted with a Mk 3 type as on a bike fitted with a Mk 2 type

Brompton 2020 Q part code: 102074
Brompton Q part code: QLSDA
Brompton part number: 9040070