Please note: the "default" configuration should be full stroke + spherical eyelet. Sphericals should be used whenever possible as they eliminate side loading from the shock.
Cylindrical eyelets are required when using a yoke or an "open eyelet" with a 15mm pin and no bushing, such as some Giant frames.
Spherical eyelets include 2 x spherical bearings (1 installed, 1 spare)
Cylindrical eyelets do not include a bushing.
Long eyelet = short stroke (5mm reduction)
Short eyelet = full stroke (0mm reduction)