Before the advent of geared drivetrains for bicycles, the pedals and cranks were directly connected to the hub. On these “direct-drive” bikes, one rotation of the pedals corresponded with one rotation of the drive wheel. Accordingly, wheel size and pedaling rate alone determined a rider’s speed. If a standard modern road bike used a direct-drive transmission, a rider pedaling at 80 revolutions per minute would travel at a speed of just 6 miles per hour. With virtually all cyclists pedaling under 100 revolutions per minute for any sustained period, the bikes required comically large wheels to achieve a reasonable speed.
In this post, I’ll share some tips on how to have a fun, fast, and safe XTERRA racing experience. If you are unfamiliar with off-road triathlons and why you might want to join in on the action in 2014, check out my introductory article here.
It’s fitting that Rock Creek Park, one of the oldest federally managed parks in the country, is situated in our nation’s capital. In the District, the park boasts 4.4 square miles of serene nature stretching from the northernmost point of DC to the Potomac River. The park is popular among hikers, bikers, horse riders, bird watchers, painters, photographers, budding scientists, and history enthusiasts. In my case however, it’s the extensive network of running trails that keeps me coming back.
As a former Knowles Science Teaching Fellow, I remain committed to high quality math and science education in the United States. I’m particularly interested in math and science education that is grounded in real-life application and develops marketable skills. In my Powered by Physics series, I aim to provide content on the interplay between triathlon and science for students, educators, and triathletes alike. The series is inspired by the enlightening text Bicycling Science by David Gordon Wilson. In this post, I will focus on how an understanding of physics can help you maximize your hill climbing potential.
The off-road trails at Gambrill State Park and neighboring Frederick Watershed are the steepest, rockiest, and most technical riding within an hour drive of DC. I’ve had so much fun riding off-road in this area than I went almost a year without discovering a second biking gem within this pristine natural preserve: the access roads.
After a full season of racing with De Soto triathlon apparel and three first out of the water performances, here are my thoughts on the T1 First Wave wetsuit…
Glover Archbold Park is tranquil getaway from concrete and city noise in Northwest Washington DC. The long and narrow park runs three miles due south from Wisconsin Ave and Van Ness St to the Capital Crescent and C&O Canal trails at Canal and Foxhall Rd on the Potomac.
I jumped on the Cervelo bandwagon rather early in the game, buying their “Dual” aluminum tri bike in 2004. It was by far the best value for the coin, with the best adjustability and the most confidence-inspiring geometry on the market. Nine years later, it still works flawlessly as a tri bike and even holds its own on gravel roads and mountain passes. Last year, Gerard Vroomen, co-founder of Cervelo, announced he was branching off to start a new company along with ex BMC CEO Andy Kessler. Together they founded OPEN, with a carbon hardtail 29er as their first offering. I knew it would be something special.