Originally Posted by
ironwood
Some riders finished the Paris Brest Paris event on 650B tires with respectable times. I don't know what size tires Fiona Kolbingen had on her bike in the Transcontinental.
The
Canyon Endurace WMN CF SL Disc 8.0 Di2 she rode has enough tire clearance for 30 mm. The factory tire is a
Continental Grand Prix 4000s II 28 mm, but I'm not sure what she went with.