can anyone help me decide please
I want to get a bike for general daily use, mostly to and from the gym which is a 10 mile round trip.
The route is mostly rough track so chunky tires would be ideal, but I also live in a flat and have to lug it up and down a few flights of stairs.
I'm short and it's no fun trying to hold a heavy bike high enough to clear the stairs :(
I dont want to spend more than around £400, I'll have to leave it locked outside the gym for an hour or so and I dont want anything too nickable.
Really I want something as light as possible but with fat mountain bike tires, I've looked at lots of lists of specs online but very very few actually give the weight of the bike....very annoying 
Any suggestions bikers?
I know hybrids are usually lighter (and perhaps not as nickable?) but I dont know if it's going to be rugged enough for the route!