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Brompton Bottom Bracket
The bottom bracket is a bit of an unsung hero in the bike world - it sits inside the bike frame (screwed in) and then has the pedal cranks bolted onto it
Every turn of the pedal rotates the spindle inside, keeping both cranks / pedals turning together - it has bearings inside which keep it moving smoothly (until they wear...
Brompton Bottom Bracket
The bottom bracket is a bit of an unsung hero in the bike world - it sits inside the bike frame (screwed in) and then has the pedal cranks bolted onto it
Every turn of the pedal rotates the spindle inside, keeping both cranks / pedals turning together - it has bearings inside which keep it moving smoothly (until they wear out)
Brompton use a sealed bottom bracket (i.e. no replaceable parts inside) with a square taper crank fitting (older cranksets use a ISO fitting and newer spider cranksets use a JIS fitting)
Brompton use a 119mm length spindle and a 68mm shell
Brompton Bottom Brackets We have 4 products.
£20.00 In StockBrompton bottom bracket cartridge JIS119mm
Brompton JIS bottom bracket - for the Brompton spider crankset introduced in 2013 Note: Not compatible with the older fixed crankset
£20.00In Stock
£21.25 Not availableBrompton replacement ISO bottom bracket...
Brompton ISO bottom bracket - for "fixed" crankset (pre-2013) See here for the replacement bracket
£21.25Not available
£50.00 In Stock
£14.99 In StockThun Brompton fit IBEX-ML 68 x 119mm...
Thun Brompton fit IBEX-ML 68 x 119mm Bottom Bracket This is a replacement bottom bracket for use with the Brompton spider crankset introduced in 2013 Note: Not compatible with the older fixed crankset
£14.99In Stock