Mongoose Bikes: Mountain Bike, Bmx Bike, Fats Tire Bike & Extra For that purpose, it doesn’t make sense to run something wider than the two.25? tires specced despite what seems to be plenty of frame clearance. The rims aren’t taped inside, and they’re drilled for Schrader valves, so IMO going tubeless isn’t really well value the trouble, either. The bike has a clear, trendy look thanks to inside cable routing and a short 40mm stem with medium-wide, 720mm bars. The geometry is fairly modern for a division store bike, with a sixty six.5° head tube angle and a 75° seat tube angle. Mongoose bikes and scooters are crafted with high-quality materials and innovative features.