Brompton’s new and improved Spider crankset is stiffer and stronger. Now available for the first time as a separate part. Introduced in 2013, this crankset is stiffer and stronger with better power transfer than the old style.
This 44-tooth setup will provide -12% reduced gearing on any 6-speed Brompton, -12% or -18% on any 3-speed Brompton, or -18% reduced gearing on any 1- or 2-speed Brompton.
Requires Brompton JIS bottom bracket (part 9044016) sold for $20