Really??? What tire? We are still searching for one that gets more than 9K. On our second Yokahama S-Drive which is supposed to get better mileage but the first sure didn't. But that second tire was put on after getting the trike laser aligned and they said it was way out. So we shall see. But we are always open for suggestions for that rear tire. Wife drives the RT Limited following me and my hotrod days are well behind me. So it isn't throttle twisting that is limiting her to 9K. Got 11K on the OEM Kenda.
MAn my first Kenda only got 5800 miles..Then went with the Vee Rubber and was OK but replaced it around 8000 miles because I was going on a trip and figured it would be bald by the time I got back home. Now using a car tire for the rear Kuhmo ESTA all weather. Think its up to around 14 k on it now and still got rubber left. Then put Federals on the front. Boy what a difference in handling. Those tires still look like new.
I am sure I would remove the rear Kenda on the Slingshot if I ever got one and find a car tire