A cyclist who mowed down a mother-of-two could have avoided her if he had a front brake attached to his Olympics-style bike, a court was told today.
Charlie Alliston, 20, crashed into Kim Briggs, 44, on his bike on February 12 last year, the Old Bailey heard.
Investigators carried out tests using his bike, and found the stopping distance was roughly four times more than a conventional pedal cycle, jurors were told.
Edward Small, a forensic collision investigator with the Met Police, said:
He said Alliston was cycling at an average speed of 18mph along Old Street, central London.
Alliston was between 6.5 and 9.5m from Mrs Briggs. He had slowed down to between ten and 14mph before the collision, but was unable to stop in time, jurors were told.
In one set of tests, investigators found a conventional bike with brakes could be stopped at about 3m.
But, referring to Alliston's bike, prosecutor Duncan Penny QC said:
Tests were also carried out in wet conditions on a fixed wheel bike with a front brake, travelling at 15-16mph, which could still be stopped within 4.8-5.6m, it was said.
When police seized Alliston's bike, they found the wheels had been changed, the officer said.
Videos were shown of the tests carried out at Redbridge Cycling Centre in April last year.
Widower Matthew Briggs sat in the well of the court as the footage was played.
Under cross examination, Mark Wyeth QC, defending, asked:
Alliston, of Bermondsey, south east London, denies manslaughter, and causing bodily harm by wanton or furious driving. The trial continues.