Large backpack for epic riding and weekends on the bike. 4 stage adjustable back length, load compression ‘Adaptive Carrier System’ with mouldable aluminium ribs for form following shape. The BX4 boasts a 1830 + 305 cubic inches (30 + 5 litres) volume, 4 compartments and a completely separate bladder compartment. The front section and hip strap has small pockets to keep tools, tubes, and a pump oraganized. A loop on the shoulder straps allows a Topeak iPhone Drybag to be fitted, while a large external helmet / wet clothes compartment allows sensible storage. The wide, elastic hip strap can be adjusted with a single hand. For increased visablity HiLumen reflectors have been integrated.

Model black
Size small, large
Material Nylon, Polyester
Capacity / Max. load 1830 + 305 cu.in. (30 + 5 l)
recommended up to 26 lbs (12 kg)
MSRP $ 149.95


Adaptive Carrier System

BA / BX Series

Ergon shoulder straps with load compression -
Load stabalised at the lower back.

Traditional shoulder straps -
instable loads movement while riding

Perfect Fit Backpack

Exact fit achieved through 4 steps back adjustment
and the 4 point self adjusting shoulder straps.

Contour Fit Aluminum Bar: body specific fitting through a formable aluminum bar
located in the rear area of the backpack. (3 aluminum close-fitting profiles on BX4).