TOBI Amusan's record-breaking performance in the 100 metres hurdles event at the World Championships dragged the spotlight back on shoe technology but the Nigerian said her display had little to do with her footwear. Amusan, who was wearing Adidas Adizero Avanti shoes designed for runners who compete in 5-10 km races, cruised to the 100m hurdles gold in what was announced as a world record 12.06 seconds but later ruled ineligible due to excessive wind speed. She had already broken the world record earlier in the day by running 12.12 in her semi-final at Hayward Field. "My abilities are not…