Hey RC enthusiasts! If you're running an HPI Micro RS4 on-road car, these D-Compound slick tires are exactly what you need for optimal performance. Each package comes with four tires measuring 36x17.5mm - the perfect size for your Micro RS4. The rubber construction is seriously durable and the D-Compound formulation gives you that sweet spot between grip and longevity. These are slick tires, meaning no tread pattern, which is ideal for smooth surfaces like parking lots, indoor tracks, or clean pavement where you want maximum contact patch. The compound is specifically designed to handle the demands of electric RC cars without wearing out too quickly. Now, just so you know - these are tires only, so you'll need to pair them with wheels and use some tire glue (like HPIC1837 or DTXR2000/2002) to mount them properly. But once you've got them installed, you'll notice the difference in handling and speed. Whether you're replacing worn-out tires or setting up your car for specific track conditions, these D-Compound slicks deliver consistent performance race after race. They're made by Associated Electronics, which has been in the RC game for ages, so you know you're getting quality that'll keep your Micro RS4 running at its best.