Most forklifts are used indoors, or a combination of indoors and outdoors. Some, forklifts, however, spend their work lives outdoors and they need some special considerations.
Let’s start with the lot you’re working in and around. Paving matters. Ideally, a blacktop or concrete is preferred over a dirt lot that can be uneven and develop holes and irregularities that can cause a forklift to roll over. Fix these immediately as they happen.
Moving up, consider solid or foam-filled tires. Sharp objects and other debris can puncture an air-filled tire- and while the initial expense of a solid or foam-filled tires is more, at least you’ll never have to call someone out to fix a flat.