Team Associated B4.1 12mm hex drive
Team Associated is pleased to introduce a 12mm hex drive front wheels for the RC10B4 and RC10B4.1 buggies. Available soon or already are plastic wheel hex adapters including shims and drive pins, B4 front axles for hex use, SC10 steering blocks to go with the hex axles as well as white and yellow 12mm hex disc front wheels. The rear hex adapter allows the TLR22 rear wheel offset to be used and the front wheels also fit the Kyosho RB5 buggy.
Source: Associated [rc10.com]