Pro Bike Gallery: Tom Zirbel’s hour record ride

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.

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Up until this week, Tom Zirbel kept pretty quiet about his plans to go for the hour record. Photo: Rally Cycling
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Zirbel rode a 53-13T gear combination. Photo: Rally Cycling
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As is the case with nearly all hour record rides, Zirbel had a power meter, an SRM unit in this case. However, during the effort, he was not allowed to look at wattage numbers, per UCI rules. Photo: Rally Cycling
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Out back, Zirbel had a 1,070-gram Hed Volo disc wheel. Photo: Rally Cycling
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The matching Volo front wheel weighs in at 1,000 grams. Photo: Rally Cycling
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Hed Corsair E Flat aero bars were positioned fairly high off the head tube, due to Zirbel’s height. Photo: Rally Cycling
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The Diamondback Serios, a TT bike modified for track use, cuts a narrow profile. Photo: Rally Cycling
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The unconventionally shaped Adamo saddle is actually pretty popular among time trial specialists. Photo: Rally Cycling
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The carbon Serios frame has plenty of aero features. Photo: Rally Cycling
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The rear stays drop low to stay out of the wind. Photo: Rally Cycling
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Surely they could have found Tom a matching black top cap for his headset! Photo: Rally Cycling
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Zirbel, 37, will retire at the end of the year. Photo: Rally Cycling

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