The issue revolves around making sure that you monitor the tires for wear, any size changes, and that you keep track of the durometer. The more the tire is used the harder it will get. These elements are equally important on both dirt and pavement tires. You need to keep track of every measurable feature on the tire. That said, there always seems to be people who are willing to buy old tires. If you do not run them until the chords are showing, then used tires still have value. In some Street Stock classes, when running a DOT tire (a street tire) you can usually run the tires for a number of races and then sell them and help underwrite the cost of new tires. You get to run newer tires and another racer who may not be able to consistently purchase new tires is racing on better rubber as well. It can be a win-win scenario.
ConclusionThe value you get from your racing dollar is dependent on a variety of factors. Concern yourself with the factors you can control. The importance of measuring, tracking, and planning cannot be overstated. To get the most value from every dollar you spend will require a bit of work on your part. Looking for the best deal from a cost perspective may not always be the best deal. You need to consider not only the cost of the part, but also the need for the part and any transportation costs if you are buying out of state and additional shipping is required. Factor this into the price you are paying.
This is not a complex process. However, it does require additional work and planning. If you are really trying to save money, then it can be accomplished.
This is a variable expense...
This is a variable expense in the making. It is never a good sign when your racecar has to come in from the track on a hook.
While this car is racing it...
While this car is racing it is still letting any prospective sponsor know that this space is available. While it's not the best way to attract a sponsor, it does help get the word out.