Carp Porter - BIG BOY TRI PORTER KIT fits mk4s, evo , fat boy and all mk2 barrows. this kit includes rear axle which bolts in place and folds as original leg.
Nash - Trax Power Barrow - Rear Wheel Kit
Carp Porter MK4S Evo > Barrows
Cocoon 2G Barrow Wide Wheel – JRC® EU
ELEMENT COMPACT CARP BARROW
Carp Porter
Barrow Wheel Conversion Kit | Avid Carp
BCUK Rear Wheel Conversion Kits - To fit Carp Zone Barrow | BarrowConversions.co
Trax Power Barrow Wheel Kit
NGT Dynamic Carp Barrow > Barrows
Source Carp Fishing Camping Outdoor Steel Hand Wheel Trolley on m.alibaba.com