Chase Ultimate Rewards - UR Points For Car Rentals?

Any way to redeem UR points for car rentals? I don't see any car rental agencies as partners for Chase UR, but I am curious if others have found a way to do it--maybe a transfer first to another partner, then to a car rental agency? If so, was it a good (ie cost effective) way to do it?

I've booked rental cars through Southwest and you usually get a discounted rate plus bonus miles depending on length of rental. UR obviously transfers to Southwest, and you can book rentals with Southwest points. I'm not sure if you can accrue bonus miles when booking with points? Not sure if United(another UR transfer partner) offers this feature, their website has none of the ease-of-use Southwest does.
The redemption would basically just be 1 UR/SW point per cent of rental cost, so I'd consider that a poor redemption. Add in the fact that you'd forego earning bonus miles for booking the car with a rental partner promotion, I'd say save them for a flight.

The redemption would basically just be 1 UR/SW point per cent of rental cost, so I'd consider that a poor redemption. Add in the fact that you'd forego earning bonus miles for booking the car with a rental partner promotion, I'd say save them for a flight.

Yeah, that's pretty horrible--I could just redeem UR points for cash in that case and get bonus miles instead.