I introduce to you the mighty Sanchez. Let the cool kids and their super-cars and super-bikes rule the streets, the Sanchez rules the rest.
Kinsmen, you will bound from the highest boulder, to dune, to hill to mountain top with the dexterity of a raptor on the wing. You will strike without forewarning and vanish without trace. And when the gangs do come looking for you, your mighty steed will taunt the clumsy with her dexterity.
Let them bring their pimpest rides, full of self bravado for the speed they bring with them. You will destroy their vehicles without a single bad sport point, nor with firing a single shot - for the mountains will swallow them whole, a little shaking, a little tenderising, down they go.
Oh, they bring their helicopters and jets and other rich kid toys - well any good horsemen knows where the nearest rail tunnel is. Fly your plane into there why don't you.
The only thing you will fear is another Sanchez.... oh and the odd fence post, rock, stupid AI drivers. When you're kicked off a Sanchez, it's one hell of a kick.