Re: you could read that two ways...
"Apparently the Germans practised tank manoeuvres on bicycles which I thought was an impressive act, considering the USSR churned out much better tanks with much better armour and still lost to panzers."
Training + Tactics.
Before rearming, in the 1920's the Gernan army was prohibited from having tanks, so they worked around the issue. By 1928 they had dummies using sheet metal, according to Guderian.
They got a lot of their ideas from the British tank pioneers.
That said, bicycle troops are a thing: