Or an RS6
I have a feeling the OP was looking for the cheapest way to shift a tandem, not the most expensive🙂
It's not the most expensive. Then again, it's not the cheapest, I'd agree. Even if you already have an RS6 it's probably still cheaper to hire a van for the day.
@Brommers started
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I have a feeling the OP was looking for the cheapest way to shift a tandem, not the most expensive🙂