- The TWIST vario base redefines versatility by offering a variable magnetic-mechanical mount for bike frames and forks. The new TWIST vario base features 4 elongated slots, which serve as flexible attachment points for mounting. Depending on the requirements and mounting method, the vario base can be mounted to the bike at 2 to 3 attachment points using screws and cable ties. All together, this versatile TWIST base offers 10 different mounting options.– offering the right one, for every one, for every case.