None that I'm aware of and they don't need to be equipped as such. In the event you are not getting a good GPS signal, the easiest solution is to add what is know as a Speed Sensor. It mounts on F or R wheel, rotates and senses the earths magnetic field and tells the unit the distance travelled. They are very accurate and over-ride a flaky GPS signal, which can happen in canyons, or densely wooded area's.