The problem with most training tires is exactly what the name implies, they're training tires. That usually means higher mileage tread compounds and added protection belts for added durability at the expense of performance. In sharp contrast, the Closer Plus offers excellent performance with low rolling resistance and good grip with all the durability and reliability in the field to be billed a training tire. This is achieved through proven Panaracer technology, contemporary manufacturing process and a supreme focus on the product. Simply put, Panaracer chose to focus on the Closer Plus (which is rare for a tire in this price point) and offer a high quality trainer, that can double as a race tire in a pinch.
The Zero Slip Grip (ZSG) tread is based on a natural rubber compound but has some silica added to the mix to achieve longer wear times and less rolling resistance. It works well in both dry and inclement conditions and is extremely durable and cut resistant. The Closer Plus has Panaracer's flexible and pliant bead to bead PT protection layer belt that acts as a barrier between the casing and tube. This added feature makes it almost impossible for average debris from the outside world to enter the inner casing and cause a flat. Panaracer uses their 400D Lite Cord casing to increase the sidewall durability and stiffness without adding weight. The Closer Plus is lightweight, durable and offers long wear times. Considering the quality construction and materials used at this price point, this tire's value vs. performance cannot be denied.