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50T Brompton crank set (left and right complete) - the "new" 2013 "spider" Brompton crankset
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The Brompton "Spider" crankset was introduced on new Brompton bicycles at the beginning of 2013. In 2015 it was introduced to the after-sales market, allowing us to offer it to you
Colour: Silver (with black chain guard)
It is available in a choice of 44T, 50T and 54T sizes - the 50T is the standard one used on a 3 or 6 speed standard ratio Brompton
This is a replacement 50 tooth crank set complete with left and right hand crank - bottom bracket is NOT included - if you are upgrading from the old fixed crankset then you will also need to change the bottom bracket (the old one was ISO standard and the new one is JIS standard)
This Brompton "spider" crankset has a few advantages over the older fixed crankset:
The box contains the following:
Left hand crank and bolt
Right hand crank with 50T chainring and chainguard and crank bolt (pre-assembled)
Crank length 170mm
Brompton logo on cranks
A standard 3 or 6 speed Brompton comes with this 50 tooth front chain ring
Brompton Q part code: QCRANKSET-SPI-50
Brompton part number: 9020140