The fat bikes inspire confidence over skinny-tire models, and they feel like “monster trucks,” my kids reported. Once the big wheels get rolling they are hard to stop. On singletrack dirt they spin and crush over logs, rocks, roots, and almost anything else without a blink. Suspension is not necessary for many trails with fat tires, which can be run at a low air pressure to absorb obstacles. Framed makes its bikes for all budgets. Fat bikes often cost $2,000 and up. But the kid’s model from Framed is $600, and the men’s and women’s bikes are $899 each, letting you experience the joy of fat riding more affordably than before.