Calf warmers were first introduced to the sporting world at the Sub7 / Sub8 challenge, the 3:Sixteen design and name a nod to the 3-hour, 16-minute bike stage that saw Joe Skipper achieve a sub-7-hour Ironman. The team was made up of some of the world's best time trialists, including Alex Dowsett and Dan Bigham, recently crowned UCI hour record holder, who crushed the opposing team to deliver one of the most incredible time trials of all time.
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- Up to 12 watts of savings.
- Designed for the Sub7 Sub 8 record challenge.
- Designed and improved by Dan Bigham.
- Precise patterns to maximize aerodynamic gains.
- Aerodynamic materials.
- TT and track tested.
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Looking for your next triathlon? Check out our Ironman 2026 Calendar Please note that the back of the product is plain, without any logo or participant names.