The UCI says bike computers are big enough, moves to impose size limit to protect 'cognitive load' of riders

The Union Cycliste Internationale (UCI) has announced new regulations aimed at limiting the size of bike computers used in professional cycling races, citing concerns over rider safety and cognitive overload. Starting from 1 January 2028, bike computers will be restricted to a maximum size of 126mm by 71mm. This move is intended to curb the increasing volume of data displayed to riders during competition, which the UCI believes contributes to heightened cognitive demands and a greater risk of accidents on the road. Modern cycling computers have evolved to provide a wide range of physiological and navigational data, including heart rate, body temperature, and sweat rate, although the UCI continues to prohibit glucose and lactate monitoring during races. The federation’s decision follows studies indicating that excessive data can overwhelm riders, potentially compromising their focus and safety. Manufacturers have been given a generous lead time to ensure their products comply with the new size restrictions, with many current popular models, such as the Garmin Edge 1050 and Wahoo ELEMNT ROAM, already falling within the proposed limits. In addition to the bike computer size cap, the UCI will implement a ban from 1 July 2026 on the use of inside front jersey pockets, which have been exploited by riders to carry race radios, nutritional products, and hydration bladders. This practice has been criticised for providing aerodynamic advantages and altering rider morphology, factors linked to increased speeds and more severe accidents. The new rule mandates that jersey pockets be located exclusively on the rear, with the sole exception of a pocket designed for radio communication devices. The UCI’s latest measures also include the introduction of new penalties targeting bike accessories and rider equipment to ensure consistent enforcement and enhance deterrence. The governing body emphasises the importance of ongoing dialogue with stakeholders to better understand how riders interact with data during races and to balance technological innovation with safety and fairness. These changes reflect the UCI’s broader commitment to maintaining competitive integrity while safeguarding athletes in an era of rapidly advancing cycling technology.