Tow Bar Hitch Stabiliser System

$114.00

Ships in 3–5 business days · Made in Melbourne
Lifetime Warranty No questions asked
100% Australian Made in Melbourne
30-Day Returns Easy exchanges
  • Eliminates towbar wobble with dual-side clamping and fine-thread locking
  • CNC machined from high-tensile billet for extreme strength and durability
  • Built-in magnets for quick, accurate alignment during installation
  • Compatible with 50×50 and 2″ towbar receiver tubes
CNC Billet · Dual-Side Bolted

Zero Wobble, Zero Compromise

Standard hitch pins were never designed for the loads a loaded bike rack puts on them. The iSi Hitch Stabiliser System replaces that flimsy pin with a precision CNC-machined assembly that bolts your rack rock-solid into the receiver. No rattle, no wobble, no movement. Just a tuned structural connection between your vehicle and your bikes.

CNC High-Tensile Billet Dual-Side Bolted Magnetic Alignment Lifetime Warranty
iSi Hitch Stabiliser System CNC machined anti-rattle assembly
!Standard Hitch Pin

Wobble. Rattle. Play.

A basic pin leaves play in every direction. Your rack moves independently of your vehicle, sending vibration straight into your frames and loosening under load.

✓iSi Stabiliser System

Tuned Structural Connection

Dual-side bolting locks the rack rigidly in yaw and roll with a controlled amount of pitch float. Your carrier becomes a structural extension of the vehicle, exactly as we designed it.

The Engineering

Locked In Three Dimensions

Every hitch-mounted load moves on three rotational axes. The Stabiliser System controls all three with purpose, not by accident. Understanding how matters more than you'd think.

Rigid Where It Counts, Forgiving Where It Should Be

A completely rigid connection might sound ideal, but it creates destructive shock loading over corrugations. iSi's system is engineered to lock down the two axes that cause wobble while allowing a controlled amount of vertical pitch float to absorb road impacts.

Yaw
Side-to-side twisting of the rack
Locked
Roll
Left/right rotation along the hitch axis
Locked
Pitch
Controlled vertical float to absorb shock
Tuned
CROSS-SECTION · VIEWED FROM REAR LOCKED IN YAW AND ROLL 50 × 50 mm RECEIVER PIVOT BASE bolted firm TOWBAR PITCH TUNED
Simple Installation

Installed In Under A Minute

Replaces your standard towbar pin with three simple steps. Integrated magnets hold everything in place while you tighten, so you're not fumbling with hardware under the rear of the car.

1
iSi Hitch Stabiliser insertion into towbar receiver
Step One

Slide Into The Receiver

With the rack mounted, slide the stabiliser assembly through the pin holes of your towbar receiver. Integrated alignment magnets hold it perfectly in place so you don't need a third hand.

2
iSi Hitch Stabiliser set screw tightening with fine-pitch thread
Step Two

Tighten The Set Screw

Thread in the CNC-billet set screw from the opposite side and tighten. The fine-pitch thread delivers huge bolting force with minimal effort, pulling the rack tight into the receiver walls.

3
iSi Hitch Stabiliser R-clip safety retainer
Step Three

Secure The R-Clip

Drop in the safety R-clip to lock the assembly. That's it. Your rack is now a tuned structural member of the vehicle, rigid in yaw and roll with zero remaining play.

Why It's Different

Manufactured To A Higher Standard

Off-the-shelf anti-rattle bolts fail because they weren't designed for real off-road loads. Every component of the iSi Stabiliser System is purpose-manufactured from the ground up.

Dual-Side Bolting

The only stabiliser that secures the towbar insert from both sides of the pin holes. Machined locknut on the opposite side eliminates every last bit of play.

Fine-Pitch Thread

Delivers superior bolting pressure with minimal turning force. The CNC-billet set screw is engineered to hold its torque on corrugated roads without backing off.

CAD Stress Validated

Every component validated using Computer-Aided Stress Analysis then proven with extensive on-road and off-road testing in the harshest Australian conditions.

Magnetic Alignment

Integrated magnets hold the stabiliser in position while you thread the set screw. No more fumbling, no more dropped hardware under the tailgate.

Universal Receiver Compatibility

Fits standard Australian and US towbar receiver sizes. Not sure which you have? Most passenger vehicles, SUVs and 4WDs use one of these two.

50 × 50mm 2" Receiver
Lifetime
Warranty
CNC
Billet Machined
Made In
Melbourne
30 Day
Returns

Not sure if it fits your receiver?

Measure the internal dimensions of your towbar receiver, or send us a photo. Our team will confirm fitment and get you the right hardware.

Speak to a Sales Engineer
​
Specifications Two Bicycle Carrier  Four Bicycle Carrier  Drawbar Mount Systems Vehicle Mount Systems
 
Weight 14.15kg 25.75kg 9.80kg – 21.20kg 4.80kg – 6.30kg
Bicycle Capacity 1- 2 Bicycles 1 – 4 Bicycles – –
Weight Capacity

64kg Total Load

Up to 32kg per bicycle

Up to 16kg per wheel

84kg Total Load

Up to 32kg per bicycle

Up to 16kg per wheel

 – –
iSi Modular Component Drawbar Mount Compatible ☑

Vehicle Mount Compatible ☑

 Drawbar Mount Compatible ☑

Vehicle Mount Compatible ☑

 Two and Four Bicycle Carrier Compatible ☑ Two and Four Bicycle Carrier Compatible ☑
Pivot Function ☑ ☑ Pivot Up & Over Pivot down to the ground
No Straps or Tie Downs ☑ ☑ ☑ ☑
Light Board Compatible ☑ ☑ ☑ ☑
Carbon Safe ☑ ☑ ☑ ☑
Rating On–Road + Off–Road On–Road + Off–Road On–Road + Off–Road On–Road + Off–Road
Materials 100% Australian Made with 100% Australian steels 100% Australian Made with 100% Australian steels 100% Australian Made with 100% Australian steels 100% Australian Made with 100% Australian steels
Warranty Lifetime Warranty Lifetime Warranty Lifetime Warranty Lifetime Warranty
Buyback Program ☑ ☑ ☑ ☑

Frame Support Cradles

iSi Frame Support Cradles are designed to keep the bicycle upright while all transport loads are handled through the Four Point Wheel Cradles. Manufactured from solid steel rod, they resist high-frequency vibrations over corrugated roads. A proprietary rubber compound developed in house features a wide, soft, and UV-resistant rubber. The result is unmatched protection for even the most delicate carbon, titanium, or thin-wall alloy frames.

Main Beam

The main beam is the structural backbone of the iSi carrier and is available in both 25° and 40° departure angle configurations at various lengths. With bikes staggered vertically along the beam, this stadium-style layout reduces the rack’s overall length by managing hub-to-hub clearance. This results in the most compact rack profile on the market, minimising rear overhang on the vehicle.

The staggered positioning also provides a clear working field for loading and unloading bikes with no overlapping handlebars or awkward reach-arounds. Designed for 2- or 4-bike configurations, the main beam connects tool-free to the pivot base and can be quickly swapped to a trailer or removed as needed. It’s a rigid, modular foundation that delivers both performance and practicality for serious adventure travel.

Tow Bar Pivot Base Mounts

The iSi Pivot Base is a robust modular hitch mount that comes standard with a high-tensile anti-rattle hitch stabiliser and an integrated auxiliary license plate holder (or optional lightboard). It’s offered in multiple height and length configurations for the best compatibility for different towbar depths​ and clearances for drop-down tailgates or rear swing out doors. Moreover, the modular mounts provide ample departure clearance so your bikes or rack avoid ground strikes. The design also features adjustable mounting positions (with multiple hitch pin holes) for fine-tuning the rack’s position relative to your vehicle, yielding a perfect fit tight to the vehicle while providing and secure wobble-free performance.

Adjustable Quad Contact Wheel Cradles

Each bike is stabilised and secured via our Quad Contact Wheel Cradle system with no clamps, bungees, or tie-downs required. The mandrel bent hoops support the tyre at four points on the tread, locking the bike in position through the wheels. This eliminates any unwanted bike movement or rolling left and right as you travel especially over corrugations or off-road tracks. Each cradle is mounted on a sliding offset sleeve, allowing independent height adjustment to finely control handlebar and saddle clearance. Bikes sit tighter and more securely with a narrower footprint, creating a compact, stable load without compromising ease of loading.