Like its older sibling the mantra 20 features a lightweight alloy frame and is designed for go anywhere riding with a spinner grind air suspension fork a serious set up features a dedicated 1x8 drivetrain and simple to use shimano trigger shifters after debating the pros and cons of disc brakes on a 20 bike we bucked the fashion trend and went for a good quality set of v brakes kids from five years old can ride this bike and dont really need the associated power and additional weight of