narrow section SPA V-belts are intended for installation on SPA section pulleys.
Minimum diameter of a pulley: 90 mm.
The SP-series of V-belts (aka Wedge Belts) is an improved version of the Classic (Conventional) V-Belt.
The SP-series due to its design with more contact area is capable of transmitting greater power than Classic V-belts thus providing a more compact drive and economical drive system.