If you're a big guy (I am nearer 19stone), I'd recommend an aluminium bike, instead of steel. For steel to exhibit the same lack of flex, it would be far heavier in comparison. Pop round to Edwardes Cycles of Camberwell, and see what they've got in stock, in their 2nd hand range. Or just phone them, and tell them roughly you are looking for. They won't sell you any shit, as they take care to try to do things right, the first time round. Also, any servicing needs you will have in the future, they will do a sterling job there also.
For some reason, alu bikes seem to depreciate faster than steel....though it could be due to the perception of longevity of the frame. I own 2 alu bikes, and have no troubles at all. Plus, they're lighter, and therefore quicker, and to me, more rewarding. Steel, is easier to repair though, in event of a catastrophe.
If you're a big guy (I am nearer 19stone), I'd recommend an aluminium bike, instead of steel. For steel to exhibit the same lack of flex, it would be far heavier in comparison. Pop round to Edwardes Cycles of Camberwell, and see what they've got in stock, in their 2nd hand range. Or just phone them, and tell them roughly you are looking for. They won't sell you any shit, as they take care to try to do things right, the first time round. Also, any servicing needs you will have in the future, they will do a sterling job there also.
For some reason, alu bikes seem to depreciate faster than steel....though it could be due to the perception of longevity of the frame. I own 2 alu bikes, and have no troubles at all. Plus, they're lighter, and therefore quicker, and to me, more rewarding. Steel, is easier to repair though, in event of a catastrophe.