Hi!! I live in spain, and I also have a NX 250.I found that this bike is very useful for the city, and for initiate into trail uses(excuse my poor english).But it´s not enough for me.I´m now trying to buy another bike.If you want to reglate your rear suspension, you can do two things: Elevate it with a piece for those purpose, and leave it as soft as it is,but with more free space to the ground;or change the rear suspension for another one for enduro bikes.For the problem we have about the bike, the best option is the last,but changing the suspension is a little expensive, you can spend all you want for do that. In a especialized shop you can buy the piece you want, and they can expose you the advantages and problems of each model.