FR 4D 243mm 4x80mm 165 Flat Inline Frames

FR 4D 243mm 4x80mm 165 Flat Inline Frames. The FR 4D 243mm frames are ideal for those who want a strong freeride 4-wheel frame with 80mm wheels. The FR 4D Flat frames are compatible with almost all FR, Micro, and Seba inline skate boots and with a lot of Rollerblade inline skate boots (and among them the Rollerblade Twister models). These frames have a flat set-up (all four wheels touch the ground at the same time), so they will provide very good stability and balance.