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Tow-Bar Mounted Bike Racks
Modular 1-4 bike racks manufactured in Australia for cars, SUVs, 4WDs and utes.
Frame Support Cradle | Carbon Care
From $48.00
Ships in 3–5 business days
·
Made in Melbourne
- Custom-designed rubber cradle with wide, soft contact for carbon and alloy frame protection
- Solid steel rod construction dampens high-frequency vibrations on rough terrain
- Available in left- or right-handed configurations for tailored setup and ease of use
Carbon Care · Australian Made
Protection For Every Frame
Your carbon frame cost more than most bike racks. It deserves better than a generic rubber block. The iSi Carbon Care Frame Support Cradle pairs a solid steel rod skeleton with a proprietary in-house rubber compound designed to absorb vibration and protect the most delicate frames on the planet.
Carbon Safe
Vibration Dampening
UV Resistant Rubber
Lifetime Warranty
Carbon Fibre
Full protection for delicate layups
Titanium
Zero marring on premium frames
Thin-Wall Alloy
Safe on lightweight tubing
Developed In-House
Rubber Technology Like No Other
We weren't happy with anything commercially available, so we made our own. Every iSi Frame Cradle is wrapped in a proprietary rubber profile that took years to refine.
In-House Production
The Compound
A Flat Contact Patch You Won't Find Anywhere Else
We rejected every commercially available rubber on the market. They failed on UV resistance. They failed on isolation. They failed on surface performance. So we developed our own compound from scratch, extruded with a flat contact profile that maximises surface area against the frame tube.
The result is the only rubber profile available anywhere offering a true flat contact patch. Wide, soft, ultra-flexible and incredibly tough. Gentle enough for a naked carbon race frame, durable enough for thousands of kilometres of Australian corrugations.
"The only rubber profile available offering a flat contact patch to maximise surface area contact."
Engineering You Can Feel
Manufactured For The Worst Roads
Every design decision is focused on one thing: protecting your frame at highway speed over the roughest terrain Australia can throw at you.
Corrugation-Proof Stability
Crafted from solid steel rod to dampen high-frequency vibrations right at the frame contact point. Crucial when driving at speed over corrugated terrain where generic plastic cradles transmit every hit straight into your top tube.
Zero Rub, Maximum Protection
The proprietary rubber layer activates under vibration, subtly adhering to the frame to prevent rubbing and absorb movement internally. Exceptional protection for carbon, titanium and thin-wall alloy frames, even under extreme conditions.
UV Resistant Compound
Australian sun destroys cheap rubber in months. Our compound is engineered to resist UV degradation, heat cycling and the harsh conditions of outback touring. It stays soft, flexible and effective season after season.
Solid Steel Skeleton
Mandrel-bent from solid Australian steel rod rather than hollow tube or pressed sheet. The mass itself acts as a vibration sink, absorbing energy before it reaches the rubber contact point.
Choose Your Configuration
Type A Or Type B?
Frame Support Cradles come in two mirrored configurations. The nut is welded to the opposite side on each type, which fixes the Tee-Handle to either the left or the right. Buying a pair? Grab one of each to make up a full right-handed or left-handed setup. It won't affect how the carrier performs, just how naturally it operates for you.
Type A
Right-Handed Orientation
Tee-Handle On The Right
The nut is welded on the left side, fixing the Tee-Handle to the right. Pair with a Type B to build a full right-handed setup, or buy solo to match your existing cradles. Zero impact on carrier performance, pure ease of use.
Type B
Left-Handed Orientation
Tee-Handle On The Left
The mirror of Type A. The nut is welded on the right side, fixing the Tee-Handle to the left. Pair with a Type A to build a full left-handed setup. Same rubber, same steel, same lifetime warranty.
Lifetime
Warranty
Carbon
Safe Rated
Made In
Melbourne
30 Day
Returns
Need assistance?
Our team can confirm compatibility with your existing iSi carrier and advise on the right configuration for your loading setup.
| 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.
