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F-Cupz inserts were designed to drastically improve the functionality of standard tire foams while providing a budget friendly option. They turn any micro tire foam into a hybrid d ual stage that also gives progressive side wall support to help eliminate slipping. The F-Cupz Inserts are engineered to be modular and tunable. You can build multiple combinations this way. You can choose the amount of support/conformity you'd like by selecting a larger or smaller F-Cup. You can even pair different sizes with each other to achieve a soft or firm feel on certain sides of tires, or just running half of the F-Cup on the wheel for side wall support on just one side. The F-Cupz are a two-piece insert and are sold in pairs of two. This allows you to purchase exactly what you need, easily add pairs for tuning, or get that extra pair for the 6x6. You'll receive two standard halves and two cut-to-fit halves. This allows you to custom fit for any width wheel. The package contains 2 F-Cupz ***All products are made to order. Please check the header on the main page for approximate lead times. Thank you for your support and patience - FlubRC Show more