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Brompton lower stop disc set - MK 3 - QLSDA

QLSDA

Brompton

Brompton lower stop disc set - MK 3 - QLSDA

The rear stop disc stops your Bromptons front wheel from unhooking itself from the chainstay tube when you pick it up.

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We have 30 in stock

£11.00

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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

The lower stop disc (or LSD) assembly supplied here is a Mk 3 type

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

The assembly consists of the following parts:
Plastic lower stop disc  (with thread)
Washer
Nut
Bolt
(These parts are supplier pre-assembled)

It comes complete with a flat washer and a concave washer (in case you lost yours from the rear brake caliper)

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

See the downloads section below for instructions

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Brompton lower stop disc set - MK 3 - QLSDA

Brompton lower stop disc set - MK 3 - QLSDA

Brompton lower stop disc set - MK 3 - QLSDA

The rear stop disc stops your Bromptons front wheel from unhooking itself from the chainstay tube when you pick it up.

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1 Question(s) answered - see below

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    Answered questions

  • Asked by Glyn Morton
    on 05/02/2021
    Hi, I've been looking at the lower stop disc on my Brompton (mk3) and familiarising myself with it's function. However, I'm unable to reduce the gap between it (LSD) and the seat post to between 1mm and 2mm without the disc dropping off the end of the thread. Screwing the disc back on, thus increasing the gap doesn't affect the 'locking' of the folded bike as the hook on the front fork is sufficiently engaged, it was just beginning to niggle me that I couldn't obtain a 1 - 2mm gap. Maybe I'm misunderstanding something? I'd welcome any advise or explanation. Many thanks, Glyn Answer:
    The 1-2 mm is a guide, the key thing is that it function correctly. If it is not unhooking when you pick the bike up or snagging on the seat post when you put it down, then you have it set up correctly.

Download

QLSDA-DS

Lower Stop Disc Data Sheet

Download (0)

Data sheet

OriginUK
Comm Code87149990