5 Pro Tips for Maintaining Your Mountain Bike! More details below: #5 - Bolt Check - The nature of Mountain Biking is rough terrain, so it's completely normal that things come loose all the time. However not checking your bolts can come at a cost, if your axles come loose, stem bolts or any critical bolt come loose, things can go wrong pretty fast, and not only can it cost you money, but in bad instances hospital bills... And no one wants hospital bills. #4 - Tyre pressure - Yes, it is 100% norm