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1. Tyre pressures
Tyre pressure is important for both comfort and safety. Please note the following tips for ensuring a safe and
comfortable ride.
• It is important to keep your tyres well-inflated; soft tyres increase pedalling effort (which takes the fun out
of riding), wears tyres down quickly and has an adverse effect on handling. Keeping your tyres well-
inflated is highly recommended.
• The most appropriate pressure depends on your weight and preference. On rough roads, it’s often more
comfortable to keep the pressures near the lower end of the ranges. However, for minimum pedalling effort,
higher pressures are ideal.
• Brompton bikes are fitted with Schrader (American) valves, allowing various methods of inflation:
- The Brompton pump is well suited, and comes installed on the rear frame of all-steel Bromptons.
When replacing the pump on the bike, make sure that its seal doesn’t prevent the pump-spring from
giving full engagement with the pump locators on the rear frame.
- You can also use a standard foot or hand-pump, or an air-line found at petrol/gas service stations.
The table below shows recommended tyre pressures for tyres supplied on Brompton bicycles.
Brompton Kevlar Schwalbe Marathon Schwalbe Kojak
Min (psi) Max (psi) Min (psi) Max (psi) Min (psi) Max (psi)
Front 75 - 90 100 60 - 75 85 90 - 105 115
Rear 85 - 100 100 70 - 85 85 100 - 115 115
English
2. Gears
Brompton uses two gearing solutions: a derailleur system (left hand trigger) and a hub gear system (right hand
trigger). These systems are used independently on two- and three-speed Bromptons. When combined, the
derailleur and hub gear system create a 6-speed gearing system. Whatever your Brompton, keep pedalling while
changing gears, taking pressure off the pedals as you do so; this will ensure efficient gear changes.
From time to time, derailleurs, hub gears and triggers need adjustment; if you feel the gears are not running
smoothly or have trouble changing gears, please refer to the technical section on our website (www.brompton.
co.uk) or have them adjusted by a Brompton dealer or qualified bicycle technician as soon as possible, to avoid
any damage to the gears.
USING THE BROMPTON
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