i have no fat on me at all so the only weight will be that of the bike, which is not the heaviest or lightest of bikes.

was thinking of thinner tyres, but the cost is quite a bit for them, and i have only just recently got this new bike.

by intervals do you mean go at high speed for 20 mins? i will start to incorporate this into my ride i think, I have a cycle computer so i can try and keep a decent speed for a while before dropping down to normal.

thanks

daven