Brompton 50T chain ring / guard assembly for spider crankset

Brompton 50T spider chain ring / guard

This 50 tooth chain ring is the standard on the 3 speed (utility) and 6 speed (explore) Brompton folding bike

The "new" Brompton "Spider" crankset was introduced on new Brompton bicycles at the beginning of 2013 (so not really that new any more!)

This is a replacement 50 tooth chain ring complete with chain guard

Colour: Silver (also available in black)

It can be used to replace the 44, 50 or 54 teeth chain rings on a "spider" type crank. (a different chain length will be required if you change the chainring size)

Brompton Q part code: QCHRINGA-SPI-50
Brompton part number: 9020171

This is now also available as a black chain ring (introduced on Brompton BLACK edition bikes) - using Brompton Q part code: QCHRINGA-SPI-50-BK

The below video show how to change the Brompton chain ring