Hi, I am competing in London triathlon (charity day) for the first time this year an need to buy a suitable road bike. All I know is that it needs to be light! I am looking to spend around £200-£300 but have been told not to get a new bike for this price as won't be very good quality! Other than this I don't know where to start - please help! I am female about 5-6" and weigh about 8 and half stone. What sort of bike should I be looking for? Thanks in advance!! Abi