Hi,
I've been borrowing a friend's bike and have decided it's time to get my own.
I need a bike to cycle mostly on roads but also on towpaths and footpaths.
I used the borrowed bike to compete in a taster Tri and will be intending to do a Sprint Tri next but these are mostly on gravel paths of a local NT property.
I don't know much about bikes but have been looking at Hybrids....budget £500 max....oh and I'd like it to be white!! 
Please share your knowledge with me!!
Thanks 