All Prices current to
PRICE LIST for Brompton
Complete Folding Bicycles
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Complete Folding Bicycles Index

For more gear options consider our “after market” Six Speed Brompton conversions.
C. M Wasson Co now offers two “after market” six speed conversions for the T and L model 3 or 6 speed Bromptons. Each system is described below.

1. Front derailleur conversion: We use our custom made down tube bracket clamp to hold a Nexus braze on derailleur shifter.  Cranks are changed out for an alloy set with 53tt and 39tt chain rings.  A friction shifting mechanism is installed on the left handlebar. The gearing range is now considerably widened with six speeds. The resulting gears for each position are:
From low to high:  35”,  47”,  48”,  63”,  65”,  86”.
Cost:  $219 for hardware plus $45 to install at time of Brompton purchase. This system is simple and provides a very useful gearing range.
Total option cost $264


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2. Swiss Mountain Drive: System consists of a Swiss precision made planetary gear system integral with front crank.  This patented system lowers the entire gear range 250% The resulting gears are as follows:
From low to high:  21”,  28”,  38”,  52”,  71”,  98”.  This system is the “ultimate” for maximum gearing range.
Cost:  Mountain Drive with 54tt chain ring, 170 mm cranks and Easy Shifter feature $617.
Installation charge $45 additional. Total installed $662


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Shipping information:

Our normal shipping is by UPS Ground Service. Expect delivery in 5 to 10 days from date shipped from our shop in California. To ship a complete Brompton Bike to farthest or nearer USA points by a Ground Service, ranges from $50 to $70.

Note: Shipments outside USA are usually sent by Fed Ex Economy Air. Call us to ask about a delivery charge to your city and country. Example Singapore $325

You are encouraged to contact us by phone to discuss particulars of your Brompton order as with a large variety of options, choices and new Brompton models available you could find making your choices a bit confusing. We are here to help you!

Call us at: 650 321 0808 or 800 783 3447

or send email to:

C.M. Wasson Co