PoziLock Latch Assembly

$35.00

Ships in 3–5 business days · Made in Melbourne
Lifetime Warranty No questions asked
100% Australian Made in Melbourne
30-Day Returns Easy exchanges
  • Enables fast, tool-free pivoting and pin insertion for travel
  • Securely locks the main beam in the upright position
  • Over-centre latch design tightens as the load increases
Over-Centre Mechanism · Tool-Free

Locks Tighter Under Load

The iSi PoziLock Latch Assembly secures the main beam in the upright travel position with a precision-engineered over-centre mechanism that actually tightens as the load increases. One tap to release. Self-aligning on re-engagement. No tools, no fumbling, no second-guessing whether it's locked.

Over-Centre Latch Self-Aligning Design All Hardware Included Lifetime Warranty
iSi PoziLock Latch Assembly over-centre mechanism
See It In Action

How The PoziLock Works

Watch the over-centre mechanism engage, lock under load, and release with a single tap. This 60-second demo shows the complete raise, lock, release and lower cycle.

Effortless Operation

Three Moves. Every Time.

The PoziLock is designed to make raising and lowering your carrier a one-person, tool-free operation. The same three steps whether you're in the driveway or at the trailhead.

1

Raise The Beam

Swing the main beam up into the travel position. The PoziLock self-aligns automatically as the beam approaches upright, guiding the stainless pivot pin straight into position.

2

Insert The Pin

Slide the stainless steel pivot pin through and secure with the R-clip. The over-centre mechanism engages and the latch tightens progressively as road loads increase during travel.

3

Tap To Release

When you need rear access, remove the pin and give the latch a quick tap with your foot to disengage. The beam pivots down and clear. No tools, no effort, no drama.

The Engineering

Why Over-Centre Matters

Most latches loosen under vibration. The PoziLock does the opposite. The over-centre geometry means the mechanism passes through a dead point during engagement, so every bump and vibration on the road drives the latch tighter rather than shaking it loose.

iSi PoziLock pivot pin and latch mechanism detail
Precision Engineered

Tightens As The Load Increases

The over-centre mechanism locks the main beam securely in the upright position. Road loads, vibration and corrugations all work in your favour, driving the latch progressively tighter. The result is a connection that gets more secure the harder you push it.

  • Over-centre geometry prevents vibration loosening
  • Self-aligning for smooth pin reinsertion
  • Stainless steel pivot pin for corrosion resistance
  • Compatible with all iSi vehicle pivot base systems
Complete Kit

What's In The Box

Everything required for a direct replacement or spare. No additional hardware needed.

1
PoziLock Latch AssemblyComplete over-centre mechanism
✓
All Mounting HardwareEverything required for installation
Lifetime
Warranty
Tool-Free
Operation
Made In
Melbourne
30 Day
Returns

Need a replacement or a spare?

The PoziLock Latch Assembly is a direct drop-in replacement for all iSi vehicle pivot base systems. If you're unsure which generation you have, our team can help.

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.