Transporting a rigid floorboard-bottom inflatable is always a compromise between comfort and physical exertion on the owner's back. Even relatively lightweight 320-360 cm models assembled with a motor, battery and fuel tank can weigh more than 50-70 kg, making manual carrying not just tedious but also traumatic.
The accessories market today is saturated with offers, from budget Chinese counterparts to expensive brand systems, and it is difficult to understand this variety without preparation. The wrong mechanism can not withstand the weight of the engine, damage the transom or simply be uncomfortable to operate on a pebble beach. In this article, we will discuss in detail the design features, types of mounts and selection criteria that will help you purchase a truly reliable and functional accessory.
Choosing the right equipment depends not only on budget, but also on the specific operating conditions: whether you are going down from a sloping sandy shore or you have to drag a boat down a rocky shoal. Understanding the physics of the process and materials will avoid disappointments after the first season of use. Let's look at what parameters you need to pay attention to first.
Key parameters of choice: load and dimensions
The first thing to start planning a purchase is to accurately calculate the total weight of a boat, and many owners make the mistake of considering only the weight of the engine itself, forgetting that the weight of the boat is not enough. door-wheel They can take the load from the entire aft, including the outboard motor, the fuel tank, the battery, and the back of the floorboard cylinders. If the axle load is 60 kg and your kit weighs 80 kg, the metal may not be able to withstand the stress when it overcomes the bumps.
The second critical parameter is the height of the transom and the geometry of the inflatable tubes. The mechanism must be long enough that the wheels touch the ground when they are lowered, and the boat itself rises above the surface. If the axis is too short, you will drag the cylinders on the ground, rubbing the cloth against rocks and sand, which will lead to premature wear and tear. PVC materialFor boats with high transomania (50 cm or higher), special elongated models or systems with variable geometry are required.
Small wheels (up to 200 mm) are only suitable for perfectly flat concrete ramps or smooth asphalt. For natural conditions where roots, stones and soft ground meet, the minimum recommended diameter starts from 250-300 mm. The larger diameter provides better coasting and less resistance when driving.
Design features and types of fastenings
There are several basic installation schemes, each with its own advantages and disadvantages. The most common option is to attach directly to the mount. squirt-board This is a universal system that is suitable for most boats, but requires free space on the transom, which is often occupied by the engine's lower unit or sonar sensors.
The second popular type is removable structures that are fixed in grooves for oars or on special welding elements. They are good because they do not take up space on the transom when moving, but their installation can be more time-consuming. It is important that the fixation mechanism is reliable: vibration on water can unwind even well-tightened bolts if not used. counter-puck Or a carving fixer.
Special attention should be paid to rotary-wheel-driven systems that allow the wheels to move up without removing them completely, which is convenient when moving from transport to water, but such units are more difficult to maintain and have more potential failure points, the turning mechanism must be made of corrosion-resistant alloys, otherwise it will jam in a couple of seasons.
Why is the fastener rusting?
Seawater and even just river moisture contain salts and minerals that trigger electrochemical corrosion. Even AISI 304 stainless steel can be coated with plaque, so for critical nodes it is better to use AISI 316 or anodic-coated aluminum.
Manufacturing materials: aluminum, steel or plastic
The durability of the accessory depends on the material from which its supporting frame is made. Steel structures, even those painted with powder paint, are the least preferred option for constant contact with water. The chipping of the paint will inevitably lead to a rust focus that will quickly spread throughout the structure, weakening the structure. load-bearing metal.
Aluminum alloys (usually D16T grades or analogues) are the gold standard for water-motor-related products. Aluminum is lightweight, non-rust-resistant (covered with oxide film) and has sufficient strength, but it is worth remembering that aluminum is subject to electrochemical corrosion when it comes into contact with other metals in salt water, so the galvanic vapors should be isolated.
Plastic elements, such as the wheels themselves or protective linings, must be made of frost-resistant polyethylene or high-pressure polypropylene. Cheap plastic in the cold becomes brittle and can burst from hitting a stone. polymer-wheel They often have a ribbed structure for better grip on the ground.
| Frame material | Structure weight | Corrosion resistance | Recommended environment |
|---|---|---|---|
| Painted steel | Heavy. | Low (requires care) | Only fresh water, dry storage |
| AISI 304 Stainless Steel | Medium. | High. | Fresh water, rare contact with salt |
| Aluminum alloy (D16T) | Light. | Very high. | Universal (rivers, lakes, sea) |
| Plastic (reinforced) | Very light. | Absolute. | Low loads, calm water |
Aluminum is the uncontested leader in terms of weight/strength/durability ratio for the aquatic environment.
Types of wheels: inflatable, all-wheeled or with soiling
The type of tire you choose for your cart is dictated by the relief of the coastline you most often land on, the inflatable wheels (chamber wheels) provide excellent cushioning and soft driving, which is critical when transporting a heavy boat over rough terrain, they shake the structure and the boat less, but have the main disadvantage of puncture risk. kit In equipment, it becomes mandatory.
Solid polyurethane foam (PU) wheels are free of puncture risk and do not require pumping. They are ideal for rocky shores where the probability of damaging the chamber is high. However, their shock-absorbing properties are worse, and on very heavy boats vibration can be transmitted to fasteners.
Protector is critical for silted or sandy shores. Smooth wheels ("bald") will instantly get stuck in wet clay or deep sand, turning the descent process into exhausting pullout. soil-hook They allow you to confidently move on a soft bottom, self-cleaning when rotating.
If you change the types of water bodies (sand, stone) often, consider buying two pairs of wheels. The replacement takes 5-10 minutes, but saves nerves and time.
Compatibility with outboard motors
When installing the wheels, you need to make sure that when you're up, the mechanism doesn't block access to the starter handle, gear lever or cooling system, especially for two-stroke motors, where water intake can be low.
In addition, the center of gravity shifts when you install heavy metal structures on the transom. If the engine is low-power (2-5 hp), massive steel wheels can significantly affect the differentiation of the boat, uplifting the nose or, conversely, too much immersion in the stern.
It is important to check the gap between the engine's lower unit and cylinders when turning the engine. Some wheel designs have protruding elements that can rub PVC when maneuvering in narrowness. teflon Or rubber in places of potential contact will prolong the life of the cylinders.
☑️ Pre-purchase check
Installation and maintenance of the mechanism
Installation of transom wheels requires precision and adherence to technology. The holes in the transom board (if the mount is through) must be sealed to prevent moisture from entering the transom sandwich. Water trapped between the layers of plywood will cause swelling and rotting, which will require serious damage. boat-repair.
Regular maintenance involves washing the mechanism with fresh water after each release to the salt water body. Salt deposits crystallize in mobile compounds, causing jamming. Once a season, it is recommended to lubricate the rubbing parts with silicone lubricant, which is not aggressive to rubber and plastic.
⚠️ Attention: Never keep the boat inflated with wheels mounted and loaded for long periods (e.g. all winter) and the constant stress of the metal can cause microcracks and fatigue-related structural failure.
Before each season, check the tightening of all bolt joints. Vibration when moving on water and shaking when transporting on a trailer can weaken even carefully tightened fasteners. Loctite 243) will significantly reduce the risk of loss of parts on water.
How do you get rid of the creak?
If the wheels start to creak, don't rush to pour the oil. Often it's the sand that hits the bearing. Wash the knot under pressure, dry and lubricate with lithium lubrication. If the creak is left, the bearing needs to be replaced.
Frequently Asked Questions (FAQ)
Can you install transom wheels on a boat without a hard transom?
Installation on an inflatable transom is possible only with special wide load distribution platforms that are attached with belts. However, the reliability of such attachments is lower, and the risk of damage to the cylinder is high. For boats with inflatable transmuner, rollercarts under the bottom are more often used than trunk versions.
What is the maximum speed with the wheels raised?
The designs designed for propulsion usually allow the boat to reach full speed. However, the aerodynamic drag and sailing of the raised wheels can slightly impair handling. It is recommended to lower the wheels below water level or remove them when driving at high speeds, if the design allows.
Do aluminum wheels rust in seawater?
Aluminum doesn't rust (iron oxide doesn't form), but it's susceptible to pitting corrosion (point ulcers) and electrochemical destruction in seawater. AMG After going to sea, fresh water washing is mandatory.
What to do if the wheels interfere with the installation of the sonar?
In this case, there are models with spaced brackets or the ability to shift the mounting point, and you can also consider installing a sounder sensor on a removable bracket that is mounted only during fishing, freeing the transom during transportation.
Do I need to remove the wheels for winter storage?
In addition to removing the load from the metal, this will allow you to audit the condition of the transom panel, check the tightness of the mounts and remove sand and dirt accumulated during the season in the nodes of the mechanism.