Following testing and feedback from the professional athlete community, IRONMAN and DATEV Challenge Roth have announced a shift to a 20m drafting zone for professional racing.
The move, which will be implemented in the 2026 season, marks a change from the longstanding 12m standard. It also aligns major organisers with a rule first introduced by the Challenge Family international series in 2014. (The 20m drafting rule was implemented at Challenge Family’s The Championship event in Slovakia back in 2017.)
In recent days IRONMAN confirmed that its updated professional draft zone of 20m will take effect from March 1, 2026. This adjustment follows a testing initiative led by aerodynamics specialist Marc Graveline and IRONMAN CEO Scott DeRue. The testing utilized RaceRanger technology to measure the impact of various distances on athlete performance and race dynamics.
According to IRONMAN, the data demonstrated that at professional racing speeds, increasing the distance from 12m to 16m offered no material change in aerodynamic benefit. However, a 20m distance significantly reduced the drafting effect, helping to ensure competition remains consistent with the intent of non-drafting rules.
Scott DeRue, CEO of The IRONMAN Group, said “The data produced through this process delivered clear insights that a 20-metre draft zone meaningfully impacts race dynamics in the ways that uphold the integrity of our sport.
“Based on those findings, we are confident this change represents the right next step for the evolution of fair and competitive racing at the professional level.”
In Roth, Germany, the organisers of DATEV Challenge Roth have also committed to the 20m rule for the professional field in 2026. The decision follows a survey conducted by Pro Tri News, which found that over 85% of elite athletes were in favour of the increase.
The organisers noted that cycling speeds have increased dramatically since the early 2000s. In 2002, Thomas Hellriegel completed the 180km bike course in 04:24:05, whereas top male professionals now regularly finish in under four hours. Three-time Roth winner Magnus Ditlev noted that at 45km/h, a 12m distance can save between 20W and 50W of power.
Felix Walchshöfer, Race Director at DATEV Challenge Roth, said “We are in constant communication with the professional athletes. Many professionals who will be competing in 2026 have approached us with the request to increase the drafting zone from 12 to 20 metres.”
For both IRONMAN and Challenge Roth, the 20m rule will apply strictly to professional athletes. The age-group draft zone will remain at 12m. This is due to lower average speeds in the amateur fields and the higher density of event participants.
The DATEV Challenge Roth organising team added that enforcing a 20m rule for thousands of age-groupers would require massive interventions in race structure and potentially lead to higher entry fees or reduced participant numbers.
Jort Vlam, CEO of Challenge Family, welcomed the wider adoption of the standard, noting that 9t was Challenge Family that first introduced the 20m zone over a decade ago to create more equitable racing conditions.
Jort Vlam said “We are proud to see our 20-metre drafting rule being embraced by other leading organisations. Our commitment is not just to maintain this standard but to continue innovating and finding new ways to make triathlon as fair as possible for every athlete.”
RaceRanger will continue to provide technical support for events, allowing both athletes and judges to monitor distances more precisely.
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