Slingshot Elastic Extender - Kit

PREORDER ONLY! The next batch of these to be ready will most likely be in Fall 2026. The price may go up slightly as hardware and bearing prices are increasing across the board. Any pre-orders at this price I will honor.

This kit fits any generation Slingshot and extends the elastic by 3x length, giving a much larger "sweet spot" for the weight. The kit also includes all rollers fitted with bearings, including replacing the stock delrin spacers at the top of the Slingshot Arm. This gets rid of any of the slight sticktion that can happen with the stock delrin rollers.

There is a detailed install video here.

A review from a beta tester:

“ I don’t think I can go back to regular SlingShot. We’ve been doing a ton of handheld for these sequences and I’m comfortably doing stuff I’ve rarely/never done. Operating goofy, hard mount with a 90° roll to level then pan—it reminds me of when I got my PRO arm after using a IIIA design for years.”

Additional Elastics of different weights are available at McMaster Carr. They are listed as what WK calls them:

The size that is sent with the kit is McMaster part 5234k43

The kit includes:

1. 4x back rollers
2. 2x top rollers
3. 2x top extension mounts with cap and stainless screws
4. 2x bottom extension mounts with cap and stainless screws
5. 2x "medium" elastics, 6.25' long, tested from 15-45 lbs load with good results
6. 2x aircraft pins for top rollers
7. 4x stainless axle bolts for extension mounts

Please note that this is tested using the WK vest and Flowcine Xspine vest. Other vest fitment is not confirmed. If you have questions please reach out!

For install instructions, please follow this guide: https://youtu.be/6z2zuAV4Mfo?si=xipNoiFKmTqEK5iv