Hola! Sorry if this has been covered before, search is out don'tcha know...

I've got Jamis Aragon, an urban / comfort bike, that I don't use all that much. Aluminimum frame, triple w/fairly low gears, 700c (38?) wheels, suspension fork, suspension seatpost, cantilever brakes. Needs a tune-up but is in pretty good shape. I think it's got Shimano Acera components.

I'm wondering if it's possible to upgrade a few components on this bike and use it for some fairly easy trails. What would I need to do, besides put on bar ends and tires with a bit more grip?

Thanks!
- B