the classic jokes just never get old.

but seriously... it took this long for me to notice that Alfred's bike looks pretty much like a standard "stayer" bike used in motorpaced track races. Even the helmet is from that activity.
For those not familiar with this rather unique activity, Cycling Weekly has a nice article on it:
https://www.cyclingweekly.com/news/l...r-bikes-316992

The change from motorpacing behind a motorcycle to a sprint(?) car isn't too huge, aside from that chainring and the magnitude of the potential injuries.

Steve in Peoria