I 'd been riding a second - hand mountain bike for about two years .
I 'd was thinking of changing to a road - bike , having used it more and more on the road ; The hum of mountain bike tyres had begun to get to me !
I 'd been riding a second - hand mountain bike for about two years but was thinking of changing to a road - bike , having used it more and more on the road ; The hum of mountain bike tyres had begun to get to me !