SRAM team James Meyer and Nate Keck broke the Leadville tandem course record this weekend, setting a new mark at 7:46:04 and knocking 28 minutes off the 8:14:11 ride set by Roca Roja Rollers in 2018.
Breaking records and tackling 103 miles on a bicycle built for two requires strategy, communication, and a bike that is up to the task. Meyer and Keck chose Ventana’s El Conquistador de Montañas to power through the grueling climbs as they raced to the finish line.
Scroll through the gallery below for equipment breakdown and ride analysis.
The team averaged a combined 380 watts for the day. Leadville has 5 major climbs. Keeping the effort even for the full day was key. Average power on the climbs: -St. Kevins: 586 -Sugarloaf: 519 -Columbine: 464 -Powerline: 435 -Carter Summit: 482 Final effort was Captain at 77kg, 230 NP, 3.0 W/kg and Stoker at 68kg, 210 NP, 3.1 W/kg.
MagicZero is a new algorithm from Quarq that automatically sets the zero-offset of your power meter as you ride. The goal of MagicZero is to let the riders forget that power meter Zero-offsets even exist. Zero-offset management by the user is an unneeded complexity that can be solved with thoughtful engineering.
MagicZero: Learning As You Ride
MagicZero works by continuously monitoring the torque signals from the strain gages as you ride. When the torque signals meet specific criteria for a period of time, a torque snapshot is recorded. Over time, these snapshots accumulate. When enough snapshots within a given tolerance are collected, then a new Zero-offset is computed and set in the power meter.
MagicZero allows the Zero-offset to be automatically managed by the power meter without any specific user actions. Typically, the MagicZero measurements occur when the bike is stationary, coasting, or slowly backpedaling. But as noted above, the criteria is designed to reject snapshots incongruent with recent observations. The MagicZero algorithm is intended to be continuously operating and reaching stable convergence on the correct Zero-offset. If at any point a misleading Zero-offset is applied, the algorithm is designed to self-correct without user intervention.
Powering Rides For Any Condition
MagicZero was developed over thousands of riding miles, in all kinds of disciplines; from Road to Gravel to Mountain Bike to Fat Bikes, going from 70°F houses to -4° South Dakota winters. We are not aware of any specific environments where MagicZero is inappropriate for use. However, it is still possible to turn off MagicZero and only use Manual Zero from the head unit. To do this, turn off AutoZero on your power meter from the SRAM AXS App.
Lots of things happen during a 206 mile adventure like The Dirty Kanza that make it a must for anybody interested in two wheels. The preparation and execution require the perfect combination of emotional, physical and mechanical fortitude and the different approaches to this challenge are part of what makes the event so special. Continue reading What happens to tire pressure during a race?
Finding the right tire pressure involves a large number of related variables such as tire size, rim width, bike and rider weight and of course ride style and conditions.
Perhaps the most important variable to consider is bike and rider weight. Ultimately the tire is a spring with air pressure determining how soft (or hard) that spring is. The more weight the spring is supporting the more air pressure will be needed to keep the spring from being in a constant state of compression and unable to absorb obstacles. Continue reading Tire Pressure Explained
On a mountain bike, suspension tuning can seem more of an art than a science. Once you start to achieve a good tune, aspects such as personal preference and how you want to use your bike become important.
The ShockWiz app offers three Tuning Styles: Balanced, Playful and Custom. When tuning mountain bike suspension, there is variance in how people like to ride and variance in different models of bikes. The Tuning Styles within the ShockWiz account for these variances. Continue reading ShockWiz Custom Tuning Mode
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