ᐅ Experiences with KALLAX casters and heavy loads?

Hello everyone, I am currently looking into how suitable the castors of the IKEA KALLAX shelf are for transporting or flexibly moving heavy contents. Specifically, I am interested in whether anyone has experience with how much weight the castors can support and how durable they are over time. I plan to fill the KALLAX with heavy book boxes and some technical equipment, which will significantly increase the weight. So far, I’ve heard different opinions: some say each castor can easily hold 50 kg (110 lbs), while others warn that the castors fail quickly under heavy loads or that their smooth operation deteriorates over time. Are there any practical experiences or specific load limits? I’m also curious whether it’s better to use the original castors or switch to alternative ones, and how much the type of flooring matters (e.g., hardwood vs. carpet). Thanks in advance for your insights!

Hello Talibkin, I understand your question well. The original wheels for KALLAX are actually designed for moderate loads only. According to IKEA, the maximum load per wheel is about 15 kg (33 lbs), which can be quickly exceeded in a fully loaded shelf with heavy items. This does not automatically mean the wheels will break immediately, but their mobility decreases very quickly, and the wheels may deform or lock up.

Ideally, you should opt for wheels with ball bearings and a higher load capacity. These are better suited for heavier furniture. Additionally, the surface on which the wheels run, as mentioned before, is very important: for example, wheels perform much worse and wear out faster on carpet, while they work better on hard floors like parquet or tiles, provided the wheels have a soft tread to avoid damaging the floor.

If you plan to move your KALLAX frequently, investing in high-quality furniture wheels rated for 30 kg (66 lbs) or more per wheel is worthwhile. Another tip is not to overload the shelf excessively to keep the weight evenly distributed. 🙂

Takutau schrieb:
The original KALLAX casters are actually designed only for moderate loads.

That matches my assessment. IKEA often specifies load capacities generously; for the KALLAX casters, the values are usually around 15 to 20 kg (33 to 44 lbs) per caster, which is considered the maximum under optimal conditions.

When dealing with heavy contents like books or electronics, it is also important to consider the total load. Four casters could theoretically support 60 to 80 kg (132 to 176 lbs), but in practice this is often underestimated because weight distribution, impacts, and frequent rolling over uneven floors cause additional stress.

For your project, I recommend casters with at least 30 kg (66 lbs) load capacity each, ideally with ball bearings, and a smooth floor for easy rolling. An alternative is a fixed base with anti-slip pads if frequent mobility is not a priority.

Regarding modifications: There are various aftermarket casters that adapt well and are specifically designed for heavy loads. You should pay attention to the mounting method, as KALLAX units often require special adapters.

I would like to delve into the topic a bit more technically, as the KALLAX caster system is quite simple in design and can quickly reach its limits under heavy loads.

First: The casters are often made of plastic with basic ball bearings. This means that with heavy loads, the axle bearing suffers, heat builds up, and the plastic housing deforms – which eventually leads to the caster "locking up."

Talibkin schrieb:
how much weight the casters can handle and how durable they are in the long term

Here, I recommend considering the actual dynamic load. If the shelving unit weighs 50 kg (110 lbs), this weight is distributed across four casters – realistically, most casters bear a quarter of the load plus impact and lateral forces. Especially when moving over carpet or uneven surfaces, higher point loads occur.

Jeffon schrieb:
Casters with a load capacity of at least 30 kg (66 lbs) each, ideally with ball bearings

I agree. For long-term use with heavy boxes of books, it definitely pays off to upgrade. This means:

1. Durable casters with stainless steel ball bearings
2. Casters with a larger diameter – these roll more easily over edges and uneven surfaces
3. Rubber or TPU-coated casters – prevent floor damage and improve rolling performance

One more tip: Check the attachment of the casters carefully. Proper torque and precisely fitting screws provide greater stability. I wonder: How do you plan to mount the casters, Talibkin? Will you use the original mounting points, or are you building a custom assembly? This can significantly affect usability.

PLOMA schrieb:
I’m wondering: how do you plan to attach the casters, Talibkin? Are you going to use the original mounting points or build a custom assembly?

That is indeed a crucial point. I once tried to equip a KALLAX with casters by simply screwing regular casters to the underside – however, these were not IKEA casters. The shelf did move, but when loaded with heavier weights, it warped significantly and the casters didn’t hold well.

I suspect that the combination of soft engineered wood and weak attachment points doesn’t handle the load properly. So, if you want to make a heavy load mobile on casters, you need to reinforce the base substantially, otherwise it won’t last.

It’s no coincidence that IKEA uses different strong bonding and joining techniques for their mobile furniture. It might be more practical to plan for a heavy-duty box or a maxi-cart as a rolling base under the shelf instead of just screwing casters directly to the KALLAX.