If you want to take a 3rd and / or 4th bicycle with you on the BusBiker, you must order one or two extension sets.
The XM250 series is expandable to 4 bicycles, the 290 Series is expandable to 3 bicycles.
The extension set consists of a Wheel Gutter Rail Premium and a variable Bikeholder Block D1.
The mounting holes are usually already present on the BusBiker.
The extension set is easy to assemble yourself.

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