Shaft Eyelet:

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