Home > RockNRoller Multi-Cart > Rock'N'Roller Wheels « Back 4" G-Force Castor with Brake For R2 & R6 Model: R4CSTR/Y/B Product Brand: Rock'N'Roller MPN: R4CSTR/Y/B £9.00 (£10.80 inc VAT) Print Send to a friend Description Replacement castor with brake for Rock-n-Roller cart models R2 and R6. 4"x1" yellow castor with brake (1/2"-13 threaded stem). Polymer hub bonded to soft TPR tread. Reviews Write a customer review and share your thoughts with other customers. Be the first to review this product.