Tires

Tires are a currency exclusive to Scrap Clicker 2, unlockable at x130 Stars through the Skill Tree.

Obtainment
Once unlocked, a Tire will bounce from the left to the right of the screen once every 60 seconds. Swiping it will collect it, initially awarding 1 Tire.

Tire yield is upgraded by upgrading the "More Tires" upgrade which gives a chance to permanently double the yield of Tires when collected.

Tire Upgrades
There are five tire upgrades. All except the first one add new storms. They decrease the chance of getting a magnet storm and increase the chance for their own storm. But for example, the GS Storm upgrade doesn't decrease the chance for a beam storm.

Trivia

 * Tire production is exponential and the quickest increasing among all currencies, allowing some players to reach $$10^{500}$$ Tires within 2 weeks of introduction
 * Some have noted that Bricks, Steel Beams, Wrenches and Tires appear to be an evolution representing a growing and advancing civilization! This has led to speculation among the player base.
 * Some people didn't upgrade the More Storms magnet upgrade and Better Storms scrap upgrade, before there weren't tires and the new storms.