Pool robot: maintaining and replacing wheels, tracks and wear parts

The wheels and tracks of a robotic pool cleaner are among the first parts to show signs of wear. They support the weight of the unit, provide grip on the pool floor, walls and waterline, and withstand friction on concrete, tiles, vinyl liner or fibreglass. When they deteriorate, the robot loses traction, drifts away from its intended path and leaves areas of the pool uncleaned. Replacing them at the right time and following a few regular maintenance steps helps maintain complete pool cleaning season after season.

Why do robotic pool cleaner wheels and tracks wear out?

Wheels and tracks wear mainly because of repeated contact with abrasive pool surfaces. A robotic pool cleaner that cleans the floor, walls and waterline can travel several hundred metres during each cycle. On rough concrete or textured tiles, the tread loses its profile faster than on a smooth vinyl liner or fibreglass surface.

Water chemistry also affects wear. A pH below 7.0 makes the water more acidic and accelerates the degradation of rubber or TPU used in the tracks. A chlorine level above 4 ppm weakens elastomers over time. Prolonged UV exposure during storage outside the water hardens the materials and reduces their flexibility.

Debris trapped between the wheels and the body also speeds up mechanical wear. Small stones, gravel, compacted leaves or fine sand can enter the rotating axles and create friction points that lead to premature play in the bearings.

How to recognise worn wheels or tracks

The most reliable sign is loss of traction. When the robotic pool cleaner slips on the walls, slides back down before reaching the waterline or gets stuck in corners, the tracks or wheels have probably lost grip. In concrete or tiled pools, this issue often appears after two or three seasons of regular use.

A visual inspection confirms the diagnosis. Flattened tread, cracks in the rubber, excessive play between the track and the drive wheel, or missing pieces of material are clear indicators. On robots with independent wheels, check that each wheel rotates freely on its axle. Unusual friction or blockage indicates a seized bearing or dirty axle.

The robot’s path also provides another clue: a unit that constantly drifts to the same side or repeatedly misses steps often has uneven wear between the two tracks.

How to tension the tracks of a robotic pool cleaner

A loose track does not always need to be replaced. On many robotic pool cleaners, the tensioning system can be adjusted. Before any intervention, check the manufacturer’s manual: the procedure and the position of the adjustment mechanism vary from one model to another. The general principle is to move the tension wheel, or idler wheel, slightly away from the drive wheel to reduce slack in the track. Some models use an adjustment screw that is accessible without disassembly; others require removal of a side cover.

After adjustment, the track should be tight, but not rigid. Excessive tension increases the load on the bearings and accelerates wear. Check that a small amount of play remains, just a few millimetres at the centre of the track, and that the drive wheel turns without resistance.

The question of grease often comes up in this context. On robotic pool cleaners, lubricating the tension axles is rarely necessary, because most bearings are sealed and factory-lubricated. Applying grease to parts exposed to chlorinated water can trap sand and particles, producing the opposite effect. Lubrication should only be used when explicitly specified by the manufacturer and with the recommended type of grease.

Which replacement parts should you plan for a robotic pool cleaner?

Tracks and wheels are the most common wear parts, but brushes, whether roller brushes or blade-style brushes, also lose scrubbing performance after a few seasons, especially on rough surfaces. Filters gradually become clogged and their mesh can lose tension, reducing filtration accuracy. Seals, propulsion impellers and connection cables are also consumable parts that should be checked regularly.

To find the correct replacement parts, check the exact model number of your robot. Each manufacturer uses specific dimensions, materials and fastening systems. An unverified “compatible” track or wheel can cause installation problems or loss of traction. Original parts generally provide a fit that matches the initial design.

How to maintain the tracks and wheels of a robotic pool cleaner

Rinsing with clean water after each use is the most effective maintenance step. It removes chlorine residue, sand and small debris before they harden in the spaces between the tracks and drive wheels.

Storage is just as important as rinsing. Store the robot in the shade, protected from UV rays and heat. Avoid leaving it resting on its tracks during long-term storage: static pressure can deform the tread. The charging station or a suitable support keeps the weight off the tracks.

Balanced water chemistry also protects elastomers. A pH between 7.0 and 7.8, a chlorine level below 4 ppm and, in saltwater pools, salinity within the manufacturer’s limits reduce chemical degradation of the tracks and wheels.

Worn wheels: what impact do they have on pool cleaning?

Worn tracks reduce grip on the walls and waterline, preventing the robot from covering the entire pool. Uncleaned areas encourage algae growth and accelerate the deterioration of water quality between chemical treatments.

Wear also affects path planning. Robotic pool cleaners with intelligent navigation calculate their route on the assumption that the tracks transmit movement correctly. When they slip, the gap between the planned route and the actual route increases, creating unnecessary overlaps and missed areas. In pools with complex geometry, such as steps, shallow platforms or freeform shapes, the problem becomes more noticeable: a unit in multizone mode cannot reliably overcome level changes if traction is insufficient.

Can a well-designed robot reduce wear on moving parts?

Material choice and mechanical architecture make a real difference. The Beatbot AquaSense 2 Pro uses 37 mm TPU tracks, a material that is more resistant to abrasion on concrete and tiles than traditional rubber. Its four protective guide wheels distribute pressure and limit localised wear. The 200 W brushless motor and 5,500 GPH suction power, or around 20.8 m³/h, help maintain stable grip on the floor, walls and waterline without overloading the tracks. The automotive-grade IMR coating protects the body against UV rays, heat and corrosion.

The Beatbot AquaSense 2 Ultra reduces wear in another way: by optimising the route itself. Its AI camera and HybridSense™ technology, using ultrasonic, infrared and visual sensing, map the pool and calculate the shortest route. Fewer unnecessary passes mean fewer metres travelled per cycle and therefore less abrasion on the tracks. The Beatbot AquaSense 2 Ultra also has six protective guide wheels, compared with four on other models, distributing the load more evenly.

How often should tracks and wheels be replaced?

The replacement frequency depends on the pool surface, how often the robot is used and how carefully it is maintained. In a rough concrete pool used every day, tracks may show signs of wear from the second season. On a smooth vinyl liner with weekly use, they often last three to four seasons.

Check the condition of the tracks at the beginning and end of each season, using the visual criteria described above. Replacing them too late can damage the drive system itself, leading to a more expensive repair. The manufacturer’s warranty sometimes covers defective mechanical components: the Beatbot AquaSense 2 Pro and Beatbot AquaSense 2 Ultra, for example, are covered by a three-year warranty with full unit replacement in the event of a defect.

FAQs

How can I tell if my robot is slipping because of the tracks or because of another problem?

Take the robot out of the water and turn each track by hand. If it slips on the drive wheel, if the tread is flattened or if you see cracks, the tracks are probably the cause. If they look intact, check the brushes, because excess debris can slow movement, and check the filters, because a saturated filter reduces the power available for traction.

Should the wheel axles of a robotic pool cleaner be greased?

In most cases, no. Robotic pool cleaner bearings are usually sealed and factory-lubricated. Adding grease to parts exposed to chlorinated water can trap sand and accelerate wear. Use grease only if the manufacturer explicitly recommends it and only with the specified product.

Where can you find replacement parts for a robotic pool cleaner?

The manufacturer’s official website and authorised dealers are the most reliable sources for original parts. Some manufacturers also sell through Amazon or specialist pool retailers. Always check compatibility with the exact model number of your robot before ordering.