ST3 Tether System

ST3

  • In stock, ready to ship
  • Backordered, shipping soon

 

Train Harder. Swim Smarter.

The ST3 Swim Tether features a triple FlexRod design for maximum lift and smooth resistance. It’s ideal for swimmers who want a more natural body position and a better training experience—without relying on jets.

  • Triple Rod System for lift and stability
  • ComfortFit Belt for secure, chafe-free fit
  • Built in the USA with premium, durable materials
  • Sets up in under 30 minutes

What’s in the Box

  • ST3 FlexRod Assembly (3 rods)
  • Adjustable ComfortFit Belt
  • Stretch Cord + Carabiner (choose your length)
  • Premium Carry Bag

All components are precision-machined, UV-coated, and corrosion-resistant for long-lasting performance.

Cord Selection & Installation

Choosing the Right Cord

Cord length depends on your pool setup, install location, and swimmer size. Stretch cords extend roughly ⅓ beyond their resting length.

  • 4.5 ft – Swim spas under 10 ft
  • 6 ft – Pools under 14 ft
  • 8 ft – Most standard pools
  • 15+ ft – Extended installs or large pools

Installation Options

Base plate installs in under 30 minutes. Choose the one that matches your deck:

Need help? View the full Installation Guide.

Not Sure if ST3 is Right for You?

Compare all Swim Tether models side-by-side to find the best fit for your pool and goals.

→ Compare Models

 

Quick Specs

Overall Height 69.38 in
Height Above Base 66.75 in
Rod Material UV-coated fiberglass (3 rods)
Belt Type Adjustable ComfortFit for waist circumference 24 to 60 in
Cord Stretch ~33% of static length
Install Time Under 30 minutes
Warranty 1-Year Reliable Performance Guarantee

  • 30-Day Easy Return or Replacement
  • Responsive Pre & Post Sales Support

Regular price $289.95 Sale price$259.95 Save $30.00
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Shipping calculated at checkout.
ST3 Tether System
ST3 Tether System
ST3 Tether System
ST3 Tether System
ST3 Tether System
ST3 Tether System
ST3 Tether System
ST3 Tether System

Customer Reviews

Based on 35 reviews
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(34)
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D
Daniel Krische (Cape Coral, FL)
Turn a splash pool into an infinity pool

I live in Florida where a lot of residential pools are small and only good for cooling off or for the grandkids. With the swim tether, our small pool has turned into a workout pool. Very happy with how natural it feels while “swimming in place”.

J
Jeff Lancaster (Long Beach, CA)
Swim On

Having been a Masters Swimmer all my adult life and having had the first generation of the tether, I am very happy with all the upgrades in the new product.
I’m always happy to show my swim friends the setup, and most always get a “that’s not a workout” comment… but I’m always invite them to swim it… and then it kicks their ass with great positioning and support, the ability to refine swim stroke and improve breathing technique…. Hahah. Many have been inspired to get their own.
Get swimming for life.
Jeff

T
Terry B Behunin (Hurricane, UT)
Fit perfect in my Bullfrog S200.

The tether helps me stay in the swim lane, keeps my body straight down the middle. Without it the strong eddy would try to bring my legs around sideways.

C
Christine Czyzewski (Dallas, TX)
Awesome personalized customer service!

I just purchased a Swim Tether system and plates, and although we haven’t installed them, one can see that they are manufactured to a very high level of quality & finish. The owner has been in touch with us for answers & advice at every step. We cannot wait to install the system and use it!