Rally Cycling documents Tom Zirbel's hour record ride in Mexico. The U.S. TT specialist broke U.S. hour record in September 2016.

The 37-year-old talks about his career on the road and his historic, hour-long effort in September.

A look at the Diamondback Serios, which Tom Zirbel rode to a new U.S. hour record in Mexico. He was second only to Bradley Wiggins in the world.

Tom Zirbel sets new U.S. hour record in Mexico. The American rode 53.037km, which is also the second-best ride to Bradley Wiggins.

Tom Zirbel and Brianna Walle win a short opening time trial at the North Star Grand Prix.

Pre-race favorites Kristin Armstrong and Tom Zirbel don't disappoint, winning the Tour of the Gila's stage 3 time trial.

A huge bike for a rider that puts out huge watts. Zirbel will ride this Serios TT bike in the Amgen Tour's stage 6, which should suit him

A late crash at the Amgen Tour of California saw Ben Jacques-Maynes leave the race in an ambulance, while Giant's Warren Barguil was able to finish, barely

Tom Zirbel and Lauren Stephens prove fastest on a calm day in New Mexico, as Abbott and Montiel keep their overall leads

Rhae Shaw and Tom Zirbel turn in the fastest times in stage 2, and Jasmin Glaesser and Ryan Roth move into the overall lead in California