so what make of bike do you suggest for everyday use. Given that I'm over 50 and do not like racing bikes. I would like a bike for stability. I have one from Halfords but it does not fullfill my requirements.

First off, stability of the bike is more a function of the rider than the bike. Second, age has very little to do with the question. I suspect that your dislike for racing bikes is preconcieved, not from experience. Distributing your weight between arms and butt is actually more comfortable over the long haul, and a skinny saddle is often more comfortable than a wide one because it generates less friction. The shape of the racing bars gives you the option to change hand positions often to change pressure points. Once you get accustomed to the 'bent over' position, its not an issue. Actually, I find getting on a bike is a relief when my back is hurting. Setup and fit makes all the difference on a bike, both for speed and comfort. Older inexperienced riders often choose and setup bikes for an extremely upright position, thinking that this is easier on their back. Instead, it puts all the pressure on some rather sensitive nether regions, maximizes wind resistance, and reduces stability and handling by putting too much weight on the rear wheel vs. the front. All that said, even though I race, and have a good racing bike, I put most of my miles on a mountain bike. Most of my riding is on a crushed limestone trail, so the sturdier tires and shocks take out the vibration. Replacement tires are also cheaper and more durable on the MTB. I've put aero bars on it also, not so much for aerodynamics as for more choices of hand and riding position on long rides. So what to do? Go to a reputable bike shop and use their experience, both for choice of bike, and setup. Be prepared to open the wallet a bit. I would destroy a department store bike in a week. The frames and components just won't stand up to hard use. Need a brand recommendation? There's lots of good ones, but you won't regret a Cannondale (or Giant, or Trek)P.S. Don't forget the helmet. Its cheap insurance against the unexpected. P.P.S. Of course, there's always the recumbents. I have no personal experience with them but some of them look really cool. You would, of course, be expected to grow facial hair, as that is a requirement of the Human Powered Vehicle Association

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