How we research and choose

Sources

Every guide lists its sources at the end of the page. They come from:

• Wheel and gear makers' product pages, spec sheets and user manuals
• Safety standards and agencies (UL 2272, the CPSC, helmet standards such as CPSC 16 CFR 1203 and ASTM F1952)
• State and city rules on personal electric devices
• Owner reports and Q&A where they add something the spec sheet does not
• Our own arithmetic (range, charging time), shown on the page

When makers state the same kind of figure in different ways (a peak rating against a continuous one, a nominal value against a measured one, a claimed maximum against a typical result), the guide says which one it is quoting. When a maker does not publish a figure, the guide says so rather than estimating it.

How a product earns a pick

1. We list what is actually for sale to US buyers on the day of writing, checking each listing on Amazon US, or the maker's own store for brands that sell only direct.
2. We read the maker's own specifications and manual for each one and put the figures that matter side by side.
3. We weigh those figures against the job: what the product is for and who will use it, the warranty, what is included, and what owners report going wrong.
4. We name a pick for each kind of buyer and say who should skip it.

Commission does not decide the order. Amazon is the only retailer we earn from. A product sold only by its maker is linked to the maker's store, which pays us nothing, and it is picked or skipped on the same terms as the rest. No brand pays for a place in a guide.

How the guides are written

Guides are researched and drafted with the help of AI tools and checked against the sources they cite. We do not publish invented test results or first-hand claims we cannot back up.

Prices

Prices are shown as a typical range at the time of writing, because retailer prices change daily. The retailer's page has the current price.

Keeping pages current

When a product is discontinued, a listing disappears or a spec changes, the page is updated and its updated date changes. Corrections from readers go to info@eucreview.com.