http://www.babystrollercity.com/instep_grand_safari_swivel_wheel_single_jogger.html The Instep Grand Safari is one great swivel wheel single jogging stroller. The swivel wheel has a "zero degree" turning radius that is great for getting through crowds or crowded malls. But if you want, you can lock-out the front wheel and turn this jogger into a great fixed wheel running stroller.