Sage Parts Solidgold and Solidgold+ tires are manufactured to the most stringent specifications. Solidgold is a premium two-stage solid tire and wheel assembly and the Solidgold+ is a three-stage premium solid tire and wheel assembly. Both versions are engineered specifically for ground support applications that require a tire and wheel assembly to provide a long service life, minimal rolling resistance, and soft enough to decrease cart and dolly wear and tear. The tire is designed to dissipate the load bearing weight when baggage carts or dollies need to be driven long distances; this helps to keep tire temperatures at lower levels, creating a longer lasting solution.