One bike for everything?

[nuliajuk]

A CX bike with rack mounts is probably a good do-anything bike.
...

There are lots of 'cross bikes on the market. Check out the Kona Jake, Rocky Mountain CRX, Ridley Crossbow... no doubt there are many others. Generally, the lowest priced model in the lineup will be the versatile one with the rack and fender eyelets.
My husband rode his Rocky Mountain for two years, then sold it to a young woman who wanted to do triathlons on it. She figured on using it with the fat tires for most of the training (the roads are really bad here) and then putting skinny road tires on for racing day. (DH still has a 'cross bike, now a Ridley Crossbow).