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.

Question: What other features does his bike have?
Self-contained rewrite: What other features did Graeme Obree's bike have in addition to the bearings?