mjr wrote:farnorth wrote:There's research 'out there' that suggests a fore and aft distance of more like 20 m is appropriate.
No, there's a newspaper interview about unpublished research in progress which has itself been rereported in English, often with mistakes. While bike haters like to push that extreme upper limit, the highest credible I've seen yet is the 5m advice on Belgian TV or the similar triathlon non-drafting rule of 7m behind the front of the bike in front.
British Triathlon drafting rules vary by length of event.
Sprint and standard distance = 10m behind the front of the bike in front.
Middle and Long distance = 12m behind the front of the bike in front.