The Saris Bike Beam Bike Frame Adapter Bar # SA3040 uses a telescoping arm that locks into place to provide a mounting point for hanging style bike racks. Since it only needs to attach to the bike frame and is secured by the straps of the bike rack, you don't need any built-in tension or bungee cords to provide support. We do not offer any bike frame adapter bars that use spring loaded arms. view full answer...
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