Brompton Bicycle Owner's Manual download pdf (Page 22)

fig HK4

fig HK1

CHS

fig

HK3

ECTION H: OTHER DESIGN POINTS TO DO WITH

ant

front

ed. It is

r, if

ire

ar out (the gap G (fig HK4) between inside

f chain and hinge plate RHPL when the bike is

it may catch on the rear

pokes, and b) it may slide off the tube CHS,

causing the bike to unfold inadvertently. If it is bent

down too far, then the hook will contact the tube

CHS at C before the front wheel (and the rest of the

bike) has dropped to its fully folded position. If it

is bent fore/aft it may strike the chainwheel or (if

fitted) the derailleur changer, and if the stay is

"crushed" in, the front wheel spokes will clash

with the chain tensioner nut as the bike is

folded.

If the hook is ineffective, and/or sticks during

unfolding, then, bearing the above in mind,

judicious bending of the wire stay (say by pulling

on the hook) should cure the problem.

FOLDING

Hook:

Correct function of the hook is import

for satisfactory folding: it retains the

wheel in place when the bike is fold

attached to the front mudguard stay (o

there are no mudguards, to a special w

form, not illustrated). If it is knocked out of

osition, the design allows it to be bent p

back. For the function to be correct:-

1. The chainwheel mustn't be too far out.

ig HK1), acts as a Part of the stay, B (f

buffer against the chain wheel during folding, and

steadies the folded front wheel. If the chainwheel

lies too f

parked, should be 0-3mm, not more), then the hook

will be a tight fit over the chainstay CHS, and may

stick when trying to unfold the front wheel.

2. The hook must not be bent wrong (fig HK3): if it

bent up too far, then a)is

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Brompton Bicycle Owner's Manual Page 22

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