The JConcepts Relapse 4.0" 1/8th Truggy Tires with Foam Inserts are a tire that have been optimized for indoor and outdoor tracks. This Relapse tire is the result of the research and development JConcepts put into the Detox and Rehab tires and features more forward bite. This tire is available in multiple compounds to best match your driving conditions.The design revolves around the center structure which has medium to small-sized, dense lugs arranged in a stacked and horizontal configuration. The lugs have strategically placed cuts and grooves to allow flex in the dust to perform when the track is in a deteriorating condition. The outer portion of the tread fits together like building blocks, with shapes placed together that nest well but also work together to flex laterally to provide a steadfast side bite. The tread tapers off cleanly to the outer sidewall giving a smooth transition during hard cornering.