It might be a minor consideration but it does matter where you put the timing strap. If you look around there is no consensus. I was looking at pictures of the pros on this site (not in English) to see if the pros had a preference. Nope - the pros don’t do it uniformly.
Andreas Raelert (GER) – RIGHT
Chris McCormack (AUS) – LEFT
Dirk Bockel (LUX) – RIGHT
Pete Jacobs (AUS) – LEFT
Andy Potts (USA) – LEFT
Terenzo Bozzone (NZL) – RIGHT
Maik Twelsiek (ALE) – RIGHT
Mathias Hecht (SUI) – RIGHT
Eneko Llanos (ESP) – RIGHT
Luke McKenzie (AUS) - LEFT
Does it just not matter? Well, it matters to me. There is a very remote chance but the sprocket, the crank arm or even the chain can pull the timing chip from your ankle. And even if these rotating parts of the bicycle drivetrain do not remove the strap from your leg the rubbing would definitely be distracting. I had a timing strip strap that did not fit just right and the end of the Velcro was not held down. This little tab would brush the drivetrain on every rotation. Nothing bad happened but I was ‘worried’ about it the entire ride.
When I checked out the photographs of the pros I was certain that they would all have their chips on their left ankles. I was surprised to see that there is no rhyme or reason.
But, I always wear mine on the left.









