- covered by Weir at these Games - in the stadium and on London's roads 7 races - in 10 days, including heats and finals 23mm - the width of his tyres in Sunday's marathon, 2mm wider than his wheels for the track 5 - hours' sleep a night, due to his hectic schedule and the adrenaline keeping him awake 50mph - top road speed - his usual track speed is around 22mph 4,000 - the approximate cost of the 8kg racing wheelchair He has been unable to use his legs after difficulties at birth and suffered a spine injury that left him walking with calipers. Even after his victory celebrations, there was more to cheer for the patriotic crowd as Shelly Woods powered home to win silver in the women's marathon. Coming into the home straight in a breakaway group of four, she held off Sandra Graf of Switzerland, who took bronze, and Amanda McGrory of the US. The American Shirley Reilly won in 1hr 46min 33sec, a second ahead of the Briton. It was Woods's first medal of  the Games at her fourth attempt after missing out in her three previous events. A delighted Woods, 26, said: 'I can't describe how great it feels. That was such a hard race, probably the hardest marathon I've done in my life. It's been such a tough week physically and mentally but I still had the speed for the finish in the marathon. 'To sprint after 26 miles, it hurts. It