Walmart offers the Mongoose Men's 26" Dolomite 7-Speed Fat Tire Mountain Bike in Navy Blue/Red, model no. R4144WM, for $199 with free shipping. That's the lowest total price we could find by $20, although we saw it for $7 less a year ago. It features an aluminum/steel frame, 7-speed rear derailleur, 4" alloy rims, and 4" x 26" tires.