Sir Chris Hoy knows all about the problems of seams and chafing when it comes to riding a bike, so his advice on what to wear under cycling shorts should be heeded.

Either nothing (if you’re wearing padded cycle shorts they’re designed to be worn solo) or perhaps a pair of merino boxer shorts. Now there’s a thought…

The difference lies between competitive cyclists clocking up mile after mile at speed and commuters on bikes in need of comfort and temperature control.

The golden rule, he says, is no seams between your bits and the seat.

http://www.gq-magazine.co.uk/article/chris-hoy-on-what-to-wear-when-you-ride

Chris Hoy cycle length short underwear