Our Rim Testing

With safety always in mind, we have developed products based beyond industry standards, following our specific Light Bicycle criteria. Before a new product launches, we test for quality, specifically strength and durability. After launch, samples from every production batch are tested to ensure performance consistency, and are part of our quality control inspection checklist.

Standard Testing

The standard or non-destructive testing aims to discover the structural performance of our products without harming their integrity.


Rim Trueness


The rim trueness test is our most basic check, and refers to the roundness and flatness of the carbon rim. The lateral and radial movement tolerance for Light Bicycle rims is 0.4mm.

Lateral Stiffness


Lateral stiffness testing determines how much a rim resists deformation sideways under a given load. Typically the wider the rim and stiffer it is. Our universal testing machine pushes the rims to measure the deflection.


Vertical Stiffness


The vertical stiffness test shows how much a rim will compress under load. Weight is slowly applied and we take measurements of the deflection to one hundredth of an inch. Typically, as the rim depth increases the vertical stiffness increases.

Braking Performance


Our braking performance test involves stopping distance, peak brake force, and heat dissipation efficiency. Results provide customers with a better idea of the actual braking effects in varied conditions.


Dynamic Balance


Unbalanced wheels and rims are prone to wobble at high speed, which undermines the controllability of the bike and wheels.We test the overall dynamic speed balance of our wheels for smoother rolling efficiency and solid road/tire contact.

Destructive Testing

Destructive tests allow us to further push and explore the limits of Light Bicycle rims in extreme conditions. It accelerates the development process and helps reduce the risk of damage to our final products.


Spoke Hole Ultimate Strength


This test determines that the key area around the holes has been precisely reinforced during the layup process. Holes must endure a force of at least 300kg/f without cracking. The high tension side of a finished wheel is typically built to 120 to 130kg/f as reference.

Impact Resistance


The impact resistance test shows the overall structural performance of the wheels, and is performed without tires mounted. The single wheel is fixed on a testing machine base, and a striker (24kg) is dropped from a specific height above. The higher the striker is raised, the greater the impact force.


Fitting Test

We want to understand the overall compatibility of our products with hubs, spokes, nipples, and tires before sending them to ambassadors for long-term tests.


Wheel Building


Rim details are amplified during the wheel building process. A rim may look perfect, but if the hole drilling angle is off or if the nipple bed layup isn’t consistent, the wheel will build poorly. Strict Quality Control must be in place along with the manufacturing processes so when it comes time to build, the wheel is predictable and within tight tolerances.

Tire Installation

We inspect tire/rim compatibility, the ease of mounting and dismounting the tire, actual tire widths, and brake track deformation due to inflation pressure.

Field Testing

Testing is not complete without skilled riders putting them through their paces. We send our newly developed rims that have passed all the aforementioned tests to riders and ambassadors across the globe. Ali Clarkson, a professional trials rider knows a thing or two about the difference a high quality wheel makes.



We pick only one sample for every test report (to be published in the near future) and the results will likely vary as the rim diameters change. Please note that the differences between models in test results are specially designed by our engineers for the intended uses.

All the test results of this section are based on the lab criteria of Light Bicycle and are implemented at our well-established testing facilities. Light Bicycle is only responsible for the test results themselves which are not set for any comparison to other brands or such regards.

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