The rear bag (Rack Sack) is designed for use
exclusively on the rear rack of the Brompton.
The maximum recommended load for the rear
rack is 10kgs" but the greater the weight being
carried here" the more noticeable will be the
impact on handling" especially over longer rides.
So" although the Rack Sack is fine for heavy loads"
we recommend putting heavier luggage on the
Brompton Front Carrier system and reserving the
rear-rack for lighter luggage which cannot be
accommodated on the front.