Conversation so far:
What did Obree do with bikes?
Obree had built frames for his bike shop and made another for his record attempt.
What kind of bikes did he build?
Instead of traditional dropped handlebars it had straight bars like those of a mountain bike.
What was special about his bike?
Watching a washing machine spin at 1,200rpm led him to take the bearings, which he assumed must be of superior quality, and fit them to his bike.
What other features does his bike have?
It has a narrow bottom bracket, around which the cranks revolve, to bring his legs closer together.
Does the bike have other custom features?
The bike has no top tube, so that his knees did not hit the frame.
The chainstays are not horizontal to the ground.

Question: What other things did he add to the bike?
Self-contained rewrite: Aside from the narrow bottom bracket, what other things did Graeme Obree add to the bike?