These solid replacement pucks are sold separately and are available in regular and short lengths. The regular pucks work on nearly all models of Woodcraft sliders.
The short solid replacement pucks generally work on specific bikes. The frames on these bikes are very close to the bodywork, so Woodcraft developed a shorter puck for race purposes. They are 1/4" shorter than the standard replacement pucks. It's a good idea for racers to carry a spare in the toolbox. They are replaced with the single perpendicular bolt.
IMPORTANT NOTE: This listing is for 1 Slider Puck. If you need both please order quantity 2. The image shows 2 sliders for reference only.
Please Note (for Honda): Honda 1000RR and 600RR use a different shorty slider puck (as noted in the drop down).