Dangerfield won his first RTTC national time trial championship in 1992 in the hill-climb event - a victory he repeated in 1993, 1995, 1996 and 1997. In 1997, he was also a 25-mile (40 km) time trial champion; he also won the event four consecutive times from 2000 to 2003. He won his first national 10-mile (16 km) championship in 2001, with repeat victories in 2003 and 2004. In 2001 he broke 10 miles (16 km) competition record with a time of 18'19" (32.76 mph), knocking eight seconds off the previous record, set by Graeme Obree in 1993.
Dangerfield was little known outside club cycling circles in Britain, having grown up in the shadow of firstly Chris Boardman and then David Millar. However, Millar's admission to using the illegal drug EPO and consequent expulsion from the Great Britain squad for the 2004 Summer Olympics meant that Dangerfield was called up into the Olympic squad to race the time trial. An injury to GB cyclist Jeremy Hunt also saw Dangerfield entered into the men's road race. Dangerfield finished 30th in the time trial, but did not finish the road race.[2]
At the Commonwealth Games in 2002 Dangerfield was disqualified for riding in the slipstream of a rider who had caught and passed him.[3]
Dangerfield retired from time trialling competition in 2009.[4]
