Custom Ebike Scope Check: What US Rules Actually Cover in 2026

The lazy version of this mistake used to be a supplier questionnaire with a checkbox for CE. This year it is an RFQ line that reads 2026 CPSC battery compliant, and it does more damage. A supplier who reads that line can ignore it and quote the bike anyway, or price a document nobody can specify. Either way the quotes stop being comparable, because each supplier is answering a different imagined requirement, and you may end up paying for paperwork with no rule behind it.

What works instead is a two-column sort before the RFQ is written. Column one holds what binds you today: the conditions inside the low-speed electric bicycle definition. Column two holds what is still a proposal: the lithium-ion battery standard the Commission put out for written comment on June 24, 2026. From there the order is fixed. Classify the build against the definition, keep the proposal out of the spec sheet, pin the measurement conditions behind every performance number, and convert the written answers into order-line language. That sequence is the rest of this article.

The Scope Mistake That Wrecks a Custom Ebike RFQ

The error is treating a proposal as a purchasing requirement. On June 24, 2026, the Commission published a notice of proposed rulemaking in the Federal Register, proposing a safety standard for lithium-ion batteries used in micromobility products under the Consumer Product Safety Act, and seeking written comments. Proposed is the whole story. A proposal asks for comments; it does not create a build requirement, and no supplier can certify a bike to a standard that has not been adopted. We hold the NPRM itself, not an adopted rule.

That is why the phrase fails in the RFQ. It names no document, no version and no battery configuration, so the supplier has nothing to answer. Push it and you get one of three replies: a copy of a test report for a different pack, a sentence saying the bike is compliant, or silence. None of those tells you what was measured. Meanwhile the quotes you collected diverge, and the cheapest one usually wins on the strength of the vaguest answer.

Write the RFQ so column one asks for measurable build facts and column two asks for document identity. A supplier can then answer in specifics: which model, which pack, which version, which date. That is how you compare quotes on the same basis instead of choosing between three different readings of one vague phrase.

Four Definition Conditions That Decide Your Ebike's Scope

The definition itself is short and every clause does work: a two- or three-wheeled vehicle with fully operable pedals and an electric motor of less than 750 watts, whose maximum speed on a paved level surface, when powered solely by that motor while ridden by an operator who weighs 170 pounds, is less than 20 mph. Drop the pedals clause and you have a throttle scooter. Change the wheel count and the vehicle is something else. Fit a bigger motor and the build sits outside the description no matter what the frame looks like.

The 170-pound figure is the one buyers misread most often. It is not a rider weight limit and it is not a payload rating. It is part of the test setup in which the speed number is produced. Which means a supplier's speed claim just under the threshold only means something when it arrives with the operator weight, the surface, and confirmation that the motor was doing all the work. Ask for the number alone and you will get the number alone.

Two boundaries belong in the same breath. The quoted text sits in the 2025 annual edition of the regulation, so treat it as the version you captured and confirm it against the current effective text before shipment. And satisfying the definition is not a certificate, not a battery approval, and not proof the bike may be ridden on a given path, because state and local rules run on their own track.

What the June 2026 Battery NPRM Actually Changes

Read the June 2026 battery document for what it does and nothing more. It was published on June 24, 2026 and seeks written comments. It proposes a CPSA safety standard for lithium-ion batteries in micromobility products. It proposes that electrical systems using those batteries comply with applicable voluntary standards, with modifications. That is the full extent of it.

Because adoption comes after comment and not with publication, the proposal creates a watching brief rather than a build line. The practical consequence: the only item it can legitimately add to your RFQ today is a request for documents. Which standard version a battery file cites, which cell and pack configuration it covers, and what date the file carries. Comments filed in the docket do not equal adoption either, so a supplier waving a comment letter is showing you nothing about the pack bolted to your bike.

There is a second reason to keep it out of the spec sheet. A pending standard can change between proposal and final text, so a requirement written today may describe a version that never takes effect. Hold the drawing, hold the scope, and revisit the document when the final text appears. When the picture does settle, the per-configuration questions are already drafted and ready to send.

Why Rider Weight and Road Surface Drive Your Speed Claim

Speed is not a property of a bicycle. It is the result of a setup, and the definition says so out loud by attaching conditions to the number. Because the same frame, motor and controller produce different top speeds with a heavier operator, on a grade, or with the rider turning the cranks, two suppliers can report honestly different figures for identical hardware and both be right.

Take one motor and one battery, put a heavier rider on a climb and switch from motor-only to pedal assist, and the measured maximum moves far enough that the figure printed in your spec sheet no longer describes the bike you are buying, which is the whole reason the definition pins operator weight, surface and power mode in the same sentence. Same bike, same motor, two different numbers.

Which means a speed figure without its conditions is not a weak piece of data. It is a comparison that cannot be run. Two quotes, one under the threshold and one over it, may describe the same product measured two ways, or two different products measured the same way. You cannot tell, and the price gap attached to that difference is not real. It comes down to asking what was measured rather than what was claimed, and the supplier who can answer that question is the one worth shortlisting.

The motor figure deserves the same scrutiny. 750 watts is a threshold inside the definition, so the RFQ needs the basis behind the label: how the rating was determined and at what point in the ride it holds. Put that question in the same block as the speed question so both answers arrive together, from the same test setup.

RFQ Questions That Close the Open Compliance Gaps

Four gaps sit open on almost every custom ebike file, and none of them closes with a brochure. The first is supplier capability. With no document on hand for a given factory's custom tooling, MOQ, price, lead time or certification, the RFQ has to ask per model and per battery configuration rather than per catalogue page.

The second is verification. No sample test, factory audit or incoming batch inspection has been run on the specific model, so the RFQ asks what the supplier's own incoming inspection covers, which records travel with the batch, and what the buyer checks on arrival. Do not write the acceptance threshold on the supplier's behalf. Ask for their procedure, then set the threshold in your own agreement once you have it.

The third is change. Rules move, so ask which standard version and which date each document cites, and re-verify the effective text before the shipment leaves. The fourth is currency. An annual edition of a regulation, plus an earlier final rule, is not a compiled set of everything in force at a later date, so ask the supplier to confirm their document against the version in effect at the time of the order, with the confirmation date written down.

None of those questions invents a number, a test result or a commitment. They turn four unknowns into answers you can file, and they make a vague reply show up as exactly that.

What to Write in the Order Line Instead

Go back to that RFQ line. Delete 2026 CPSC battery compliant and put the conditions in its place, written as conditions: wheel count, pedals present and fully operable, motor below 750 watts with the rating basis stated, maximum speed under 20 mph measured on a paved level surface in motor-only mode with a 170-pound operator. Add one request per battery configuration, covering the document the supplier holds, the standard version it cites and the date, and hold the purchase order until that answer arrives in writing.

The supplier who can answer will answer in a page. The one who cannot was never quoting your bike in the first place, only a sentence. That is how the opening mistake ends, and it is the reason the split earns its keep before a single price lands: the RFQ stops being a wish list and starts working as a filter. Keep the captured file dated, because it was accurate on the day it was captured.