ST3 Tether System

ST3

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Overview What’s Included Cord & Install Info Compare Models

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
$289.95 $259.95 Guardar $30.00
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Customer Reviews

Based on 37 reviews
97%
(36)
3%
(1)
0%
(0)
0%
(0)
0%
(0)
93.5
100.0
H
Hogan Wilson (College Station, TX)
Better than expected

We built a relatively small pool so we could heat it all Winter and cool it all Summer. Swim tether allows us to swim in place in our pool. It was easy to install the anchor into the coping, and very easy to swim in place with a pool buoy, snorkel and goggles…just like I use in a lap pool. Even better, my Garmin does a very good job calculating strokes, distance, strokes/minute, etc…all the same stats I get when swimming laps in a longer pool. I am super impressed with the ST3.

M
Mariano Alicea (Research Triangle Park, NC)
Great product, customer service and value!

To borrow a phrase...
SwimTether: accept no substitute.

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

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