Axiom's Journey Uni-Fit MK3 ALU Rack is made of solid, hand-welded 10mm aluminum tubing. The Uni-Fit modular foot design provides adjustable setback and height so the rack is compatible with an extraordinarily wide range of bicycle frames, wheel sizes and geometry types. This rack is specially designed to handle large, heavy panniers (sold separately) with additional looped struts that stabilize the bags and let them mount lower for additional stability.