Brompton 54T chain ring - black
The new Brompton "Spider" crankset was introduced on new Brompton bicycles at the beginning of 2013. This is the BLACK edition version - where the chainring is black instead of silver.
This is a replacement 54 tooth chain ring complete with guard - BLACK edition
It can be used to replace the 44, 50 or 54 teeth chain rings on a "spider" type crank.
Changing from the standard 50 tooth 3 speed to 54 tooth will increase your gearing by approx. 10% making getting up hills slightly tougher but giving a higher top speed on the flat.
A standard 1 or 2 speed Brompton comes with this 54 tooth front chain ring
Brompton Q part code: QCHRINGA-SPI-54-BK
Brompton part number: 9000083