Conversation so far:
What did Graeme Obree do with bikes?
Nicknamed The Flying Scotsman, Graeme Obree is a Scottish racing cyclist who twice broke the world hour record, in July 1993 and April 1994.
What kind of bike did Graeme Obree build?
Graeme Obree's bicycle was built with parts from a washing machine.
What was special about Graeme Obree's bike?
Obree called his bike Old Faithful. It has a narrow bottom bracket, around which the cranks revolve, to bring his legs closer together.

Question: What other features does his bike have?
Self-contained rewrite: What other features does Graeme Obree's bike Old Faithful have other than a narrow bottom?