Made in the HOBBYSOUL Soft Sticky T8 Compound 1.9 tires with aluminum 1.9 Beadlock Wheels ( These 1.9 Crawler tires better than common rubber that is good heat resistance and good cold resistance, high wear resistance and excellent durability. Sticky Soft compound delivers maximum gripping power for loose conditions - dry and loamy, or wet and muddy and rock Crawling, Design for professional RC crawler. )