Bike Racks for Vehicles
- Ev's
- 4WDs
- Passenger vehicles
- Trayback Utes
- Expedition Trucks
- Campervan
- Motorhomes
Bike Racks for Caravans
- Caravans
- Hybrid Caravans
- Expander Caravans
- Camper Trailers
- Box Trailers
Parts & Accessories
Tow Bar Hitch Stabiliser System
$114.00
- 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
Lifetime Warranty
Warranty is lifetime, no questions asked. If something breaks, we replace it. Fellow adventurers rely on our products in the harshest, most remote conditions on the planet.
Australian Made and Owned
iSi are proudly 100% Australian made and owned, designing and manufacturing every iSi carrier right here in Australia. We use the highest quality Australian steels and materials, built to withstand the toughest conditions on the planet. No shortcuts, no compromises—just world-class engineering for true adventure.
Hassle-Free 30-Day Returns
Changed your mind? We offer a 30-day return policy. Ensure the item is in its original packaging and re-saleable condition (a 5% restocking fee applies). For full details, please visit our Shipping, Returns, and Refund Policy page.
Remove Movement Where It Matters
The Hitch Stabiliser System is a purpose built, high strength device that replaces the standard towbar pin to eliminate unwanted movement inside the receiver. It locks the carrier rock solid in place, preventing wobble and ensuring the whole assembly behaves as a tuned structural member, just as we designed it to. With the rack mounted rigidly in yaw and roll, and a controlled amount of pitch float, your bikes stay firmly stabilised, even under extreme shock loads and high-frequency vibrations on corrugated roads.
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This is the only stabiliser system that secures the towbar insert from both sides of the pin holes, delivering unmatched stability. A fine-pitch thread applies superior clamping pressure, and once the set screw is tightened inside the towbar, a machined locknut on the opposite side eliminates all remaining play. Unlike off-the-shelf bolts, our set screw is CNC machined from solid high-tensile billet for uncompromising strength and performance under load.
Precision-Engineered for Durability
Every component is CNC machined from high-tensile and mild steel to ensure maximum strength and precise fitment. Built-in alignment magnets make installation simple, while eliminating the guesswork. Unlike standard anti-rattle bolts that can deform and loosen under off-road loads, this system is designed to withstand extreme vibration without compromise.
Tested in the Harshest Australian Conditions
The Hitch Stabiliser System has been validated using Computer-Aided Stress Analysis and extensive real-world testing, both on and off-road. Whether you’re hauling bikes across the outback or down a dusty track, this system ensures your load remains secure and ready to ride at a moment’s notice.
| Specifications | Two Bicycle Carrier | Four Bicycle Carrier | Drawbar Mount Systems | Vehicle Mount Systems |
|---|---|---|---|---|
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| 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.
