It is a Philadelphia company & Joe, born in Pennsylvania, is partial to all things from that State. It appears that he & Jill Biden ride ‘Bilenky’ bikes. So, that was the hook. But, it wasn’t any old bike off-the-rack. It was bespoke. They probably even got all the relevant measurements for Boris.
I am kind of surprised it wasn’t electric. Boris is getting up there & I am sure would appreciate some assistance.
But, just in case you were wondering. A Bilenky Bike.