See: Exotek Racing

Exotek Racing have introduced the new “Spec” center spool set for the TLR 22-4. The super light slipper greatly reduces the rotating mass for improved acceleration and lower motor temps which are needed in the very competitive 13.5 and 17.5 Spec classes. The complete stock slipper assembly is 32gr and the complete Exotek spool is 19.75gr. The axle is made of titanium to reduce weight but maintain durability and the locking plates are lightened polished aluminum. These eliminates the heavy steel shaft, slipper pads, springs and plates all while using the TLR spur gears and pulleys for easy replacement when needed (works with the TLR alloy small pulley as well).