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comparison_new_gears_brompton

The new Brompton'gears range (top gear/bottom gear) of 302%; by comparison, the current SRAM 6-speed arrangement offers a range of 215%.* Like our existing 6-speed offering, however, the gearing may be raised or lowered by fitting a 54-tooth (+8%) or 44-tooth (-12%) chain wheel in place of the standard.

The graph on the next page illustrates how the new Brompton 6-speed offering fares against competitors’ products and how it performs in the wider context of bicycle gearing. The gear range is almost identical to that offered by Shimano’s Nexus 8, as employed on the Birdy and Dahon Ciao, while it is superior to the range offered on the Dahon Curve, Dahon Boardwalk, Ori/Mezzo d9 and the Birdy with 9-speed derailleur.

While the new 6-speed Brompton offering naturally cannot compete with the gear range found on modern MTB and road bikes (or with the heavy 14-speed Rohloff), it represents a significant advance for those would-be Brompton-owners who wanted the advantages offered by our bikes but were put off in the past by concerns about the Brompton’s ability in very hilly/mountainous terrain.

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Uploaded on October 6, 2008
Taken on October 6, 2008