Wis. Stat. § 342.03: Motor vehicle, trailer or semitrailer leases.

Notwithstanding s. 401.201 (2) (t) or ch. 409, a transaction involving a motor vehicle, trailer or semitrailer does not create a conditional sale or a security interest merely because it includes a provision that permits or requires the rental price to be adjusted under the agreement by reference to the amount realized upon the sale or other disposition of the motor vehicle, trailer or semitrailer.