Guide · Fit and buying
Maker claims vs measured results: how to read bike accessory specs
Bike light lumens, runtimes and pump fill times are usually the maker's own figures. How to tell a claim from a named measurement, and why tests rarely compare.
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Short answer
Most numbers on a bike light or pump box are the maker's own: lumens, runtime, psi, seconds and gauge accuracy. A measured number belongs to a named publication and only means something with its conditions: the tire, the target, the mode, the cooling. Results from different tests rarely compare, and we test nothing ourselves.
Our evidence ladder
We sort every figure into one of three rungs and label it that way on this site:
| Rung | What it is | How we word it |
|---|---|---|
| Maker claim | The maker's own figure, under its own method | "The maker rates" or "the maker claims" |
| Listed figure | A number printed in a review that does not say it measured it | "The review lists" |
| Named measurement | A publication's result with its method stated | "road.cc measured, on a 30 mm tire" |
We never add a rung of our own. We do not test products.
Pumps: claims and three tests that do not line up
CYCPLUS lists the AS2 Pro at 120 psi maximum with a claimed gauge accuracy of plus or minus 1 psi.[1] It claims the pump reaches about 80 psi in roughly 50 seconds and 120 psi in about 2 minutes, under its own protocol.[1] Those are claims, not calibration results.
Three publications measured the same pump in different ways:
- BikeRadar (October 2026) describes 32 mm Tufo tires set up tubeless on a Zipp 303 SW wheel, with a 53 psi front target checked against the SRAM AXS app.[2] Its results, however, quote 51 psi and a 35 mm tire. It reported that the CYCPLUS AS2 (a different model) took 59.3 seconds to reach 51 psi, with that inconsistency unresolved.[2]
- TOUR measured the AS2 Pro reaching 4 bar in 59 seconds and 7 bar in 161 seconds on a 700x30c tire, with the housing at 62 °C at 7 bar, from one sample.[3]
- road.cc's reviewer found the AS2 Pro took about 50 seconds to inflate a 30 mm tire to 60 psi, four times per charge.[4]
Each result holds for its own tire and target. Do not rank them against each other, and do not set any of them beside the maker's own times.
Lights: what FL 1 does and does not tell you
ANSI/PLATO FL 1 is the method most light makers cite. Following it and reporting results is voluntary, and each company runs its own tests.[5] Under FL 1, runtime runs from the output 30 seconds after switch-on until it falls to 10 percent of that value, so it is not time at full brightness.[5] Beam distance is where the beam falls to 0.25 lux, and peak intensity is given in candela.[5]
Independent light tests state their method:
- road.cc photographs each front light's beam on the same dark lane with fixed camera settings (1 second at f/29, ISO 6400).[6] It takes lux readings 2 m from the light, in 10 cm steps out to 1 m.[6] It says its beam photos compare directly only within the same year's test.[6]
- A road.cc reviewer got about two hours on full power plus about 30 minutes on dipped beam from the Magicshine EVO 1700, after which it shut off with no reduced mode.[7] That is one mixed ride, not a runtime curve.
- BikeRadar's 2021 Ravemen CR1000 review lists 142 lux at 5 m and 120 minutes at maximum in its features box, without saying whether it measured them.[8] That is a listed figure.
Cooling changes results. In 1Lumen's test of a flashlight (not a bike light), high mode reached the FL 1-style endpoint at 4 h 43 min with a fan but 13 h 29 min without one.[9] The longer time reflects output stepping down, not more light. In low mode, the same light reached the endpoint at 7 h 29 min but kept running until 10 h 44 min.[9]
Mounts: fit testing is not strength testing
Wahoo says it tests third-party mounts for fit only, and does not stress- or weight-test mounts or their interfaces.[10] So a third-party mount that Wahoo has checked has been checked for fit, not for strength.
Reviews in general
The FTC's rule on consumer reviews, effective October 21, 2024, bars a business from misrepresenting that a website it controls provides independent reviews.[11] We call our pages research-based, cite every figure, and never claim our own testing.
Products with both a maker figure and a named test
Picks that fit2 products
Choose the CYCPLUS AS2 Pro in black, which TOUR and road.cc measured under different conditions, or the Knog Blinder 1400 (light only), whose runtimes by mode are Knog's own ratings.
More on choosing
On Amazon, check that 'Ships from / Sold by' shows Amazon.com or the brand.
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Questions
Are bike light lumen claims accurate?
A lumen figure on the box is the maker's own. Even an ANSI FL 1 figure comes from a voluntary standard under which each company runs its own tests. Treat it as a claim unless a named publication measured the light and said how.[5]
Can I compare inflation times from two reviews?
Not directly. BikeRadar used 32 or 35 mm tubeless tires to about 51-53 psi, TOUR a 700x30c tire to 4 and 7 bar, and road.cc a 30 mm tire to 60 psi. Different tires and targets give different times.[2][3][4]
What does ANSI FL 1 on a box mean?
That the maker says it measured the light to the ANSI/PLATO FL 1 method. Following the standard is voluntary and each company runs its own tests. Its runtime ends when output falls to 10 percent, and its beam distance is where the beam falls to 0.25 lux.[5]