Once you have decided on whether to go for speed or comfort
Consideration 3: Make and model.
Once you have decided on whether to go for speed or comfort, it's now time to zoom in on the different makes and models. For instance, mountain bikes may be made from different materials such as aluminum (cheap) or carbon fibre (a lot more expensive). Carbon bikes are extremely light, and they handle better and also go a lot faster. However, they come with a hefty price tag. Then you have to consider other features such as the type of wheels, the suspension, and the type of brakes.
Consideration 4: Your budget.
It all comes down to budget. Everyone wants a carbon bike with all the bells and whistles. But if budget is a concern, you want to do away with all the fancy features. Just stick with what's useful and functional. You can always upgrade when you have more cash.