Throughout the 24-month process that had its share of ups and downs, Yeti’s faith was steadfast and Shimano’s commitment unwavering, as it sent engineers to every single race and countless off-site test sessions.
"The Yeti and Shimano partnership spans over decades,” shares Damion Smith, Sports Marketing Manager for Yeti Cycles. “In the past two years, Shimano's focused effort and dedication to delivering the Yeti/Shimano EP Racing Team a power-stage and race-winning drive unit have been truly impressive. Dedicated partners like Shimano keep Yeti Cycles' Race Programs at the cutting edge and on the podium. Witnessing their unwavering commitment to racing development firsthand has been both rewarding and inspiring. I am proud and honored to partner with such a legendary and committed brand."
Through this relentless work, a host of innovations have been developed and put to use. At the outset of the project, power output was increased by 20% to 600 watts with the then still-in-development EP801 drive unit. Riders can now enjoy the increased technical capability of EP801 equipped bikes, with other race developed improvements coming soon.
Besides increased power, the first requests from Hannah were a higher level of assist ratio, assist that remains at full strength up to the cut-off speed, and extended carry-over when the pedals stop turning. Those features can help any rider tackle more technical terrain and will be released as a no cost firmware update for EP801 bikes soon. The unique race development format of the EP Racing program allows for constant exploration of new customization options that will continue to elevate Shimano E-Bike Systems for years to come.
Like all Shimano athletes, the riders have had the freedom to choose their components and decide what is best for their race performance. The result of the first team camp in 2022 was Hannah’s choice for Di2 shifting over mechanical. The obvious benefit was the ability to Free Shift. From the very first ride, Hannah could find speed on the trail by pre-shifting to the right gear while coasting, letting Free Shift technology spin the chain ring and move the derailleur so that he could accelerate out of every corner.
The somewhat surprising benefit of Di2 came later with the first Auto Shift tests. While fully automatic shifting that keeps up with a hard charging World Cup racer remained out of reach, it proved to be relatively easy to predict the shifts to the right gear while the rider is coasting. The benefit of being able to trust the gear when pedaling out of any corner was a big motivator to give it a shot, and Hannah chose to let the computer do his Free Shifting automatically for select stages at his first EWS race ever. It was a valuable tool in his first stage win that day and set the team on a course for Auto Shift development with lofty goals, to let the racer forget about shifting almost entirely.
Whether they use HYPERGLIDE+ or LINKGLIDE, all EP801 bikes equipped with XT Di2 shifting have the ability to use the best version of Auto Shift for aggressive riding, where the computer chooses the gear while coasting but the rider has complete manual control whenever the pedals are turning.
Two years of Auto Shift development brought clever improvements to the algorithm bit by bit. The additional speed and confidence to be gained from fully trusting Auto Shift through the one or two gear changes needed to continue accelerating after exiting a corner started to come within reach. During the off-season, Hannah found he was finally able to keep his focus on the trail and his thumb wrapped around the bar for those hard charging bursts of pedaling. In keeping with other race inspired improvements, this updated Auto Shift algorithm will be available by firmware update on XT Di2 equipped bikes soon.