Breaking Assumptions

One world record - Sixty Three Triathlons

A lifetime of proving assumptions wrong.

the book

Most people see the finish line.

They often don’t get to see the miles before it.

Breaking Assumptions follows Tom Scheer's journey through three years of 70.3 triathlons on a quest to break a World Record — but the real race began decades earlier.

Each race tells a different story: childhood, identity, adversity, leadership, family, resilience, and the moments when life challenges the assumptions others place on us.

Follow the Journey

Follow the Journey ⦁

Growing Up

Learning how identity, perception, and expectations shape the way the world sees you.

The Races

70.3 miles.
Swim. Bike. Run. Repeat.
The physical challenge becomes a classroom for life.

The Lessons

Every chapter reveals a lesson earned through struggle, discipline, and persistence.

The Record

A pursuit of something nobody has done before - and a reminder that the impossible is temporary.