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SECTION A: SAFETY.
1. Before riding, see that the seat pillar clamp is properly secured, and that the hinge clamps are in place, with levers firmly screwed up.
2. Carrying the Brompton: it is obviously less critical that the bike is correctly folded than assembled, but bear in mind that, if the machine is not properly locked together, unexpected unfolding of the folded package, for instance on a staircase or lifting it off a luggage rack, could cause injury.
3. When riding on a gritty surface, or obliquely across a groove or step, small wheels have less grip. Take due care, especially in the wet. Wet metal is particularly slippery.
4. Keep the gears properly adjusted, and brakes and control cables in good condition. Remember that in rain the brakes may be less effective.
5. During folding and unfolding, avoid putting your hands anywhere that they may be trapped.
6. High mileage and hard riding: aluminium alloy is used on the Brompton and this has a limited fatigue life. Failure in use can cause injury, so follow the recommendations in section K regarding routine replacements of ALLOY components of the bike.
7. On an S-type, do not use any front luggage except the S-bag (other luggage items are taller, and interfere with steering). For the same reason, avoid overfilling panniers or basket on a P-type.
8. When riding a P-type, remember you have no brakes to hand when using the lower grips. Also, take care when changing your hand-position.
9. The Brompton is designed a) for loads not exceeding 110kgs, and b) for use on roads and well made paths. It is not designed for cross country riding or for higher loads: this can overstress the frame, and the tyres and wheels are unsuitable.
10. Do NOT try to alter the height of the handlebar stem where it enters the front forks.
11. Use lights, front and rear, when riding after dark.

Before using your Brompton, we recommend you read the sections on safety and folding. You should also be aware how important it is to keep your tyres well pumped-up: soft tyres make for a lot more pedalling effort (which takes much of the fun out of riding), wear out quickly, and also have an adverse effect on handling. We cannot over-emphasise the need to keep tyres well inflated.
If you carry out any adjustments or maintenance work yourself, do read the relevant section of this manual first, as it's quite easy to get things wrong, and to impair the folding process or damage the machine. If you take your bike to a dealer for any servicing work, wherever possible use an authorised Brompton stockist.
Serial and Frame Numbers. The label at the back of the seat tube on the main frame carries the serial number. The frame number is stamped on the main frame just forward of the rear suspension pivot: it's a good idea to keep a record of both numbers. The serial number will be useful if you have any maintenance or technical queries.

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