Class, tires, capacity and weight side by side
Six bikes, including two that are popular for trail use and should not be. The blank cells are the point.
| Bike | Published class | Tires | Battery | Weight |
|---|
| GoTrax F3 | Class 1/2/3 selectable | Skinnier road tires | 672 Wh | 58.3 lb |
| Retrospec Chatham Rev | Class 2 (20 mph) | Wide cruiser tires | 360 Wh | 58 lb |
| GoTrax Ranger | Class 2 (20 mph) | Fat tires | 499 Wh | 69.7 lb |
| Aipas A2 Folding Fat-Tire | Class 1/2/3 selectable | 20-inch fat tires | 614 Wh | Not published |
| Jasion Roamer | Not published | Road tires | 528 Wh | Not published |
| SASIKEIBIKE 20-inch folder | Not published | 20 x 4 fat tires | 1,040 Wh | Not published |
The SASIKEIBIKE row is the one that hurts. A 1,040 Wh pack on 20 × 4 tires is, on paper, the trail bike of the whole bracket — roughly 50 planning-figure miles and a tire that floats over loose stone. SASIKEIBIKE publishes neither a weight nor a class, which means you cannot check it against a trailhead sign and cannot check it against a rack rating either. It is a terrific bike to own and a hard bike to recommend for regulated trails.
Three kinds of trail, three different answers
“Trail” covers at least three surfaces, and the right bike is not the same for each.
- Rail trails — paved or crushed stone. Flat, long, usually busy, and almost always restricted by class. This is the easiest riding on this page and it rewards efficiency rather than torque: the Chatham or the F3. You do not need fat tires, and the extra rolling resistance costs you miles.
- Gravel, forest road, towpath.Loose surface, potholes, roots at the edges. Tire width starts to matter more than watt-hours, so this is the Ranger or the Aipas. Drop the pressure a few psi from the sidewall maximum — our tire-pressure guide explains why that is the single cheapest comfort upgrade there is.
- Singletrack and mountain-bike trails.Be honest with yourself: no bike on this page belongs there. Value e-bikes have hardtail or rigid frames, mechanical or entry hydraulic brakes and 60–70 lb of mass, and most purpose-built MTB trails exclude Class 2 throttle bikes anyway. If that is the riding you want, our e-bike vs mountain bike guideis the honest read, and the answer is often a conversion kit on a real mountain bike — see converting a mountain bike.
Check the trail before you buy the bike
Thirty seconds of homework beats a $700 mistake. The rules come from whoever manages the trail, not from a national standard, so check in this order.
- The trail’s own page. State parks, county park districts and rail-trail conservancies publish an e-bike line, and it is usually explicit about classes.
- The land manager, if it is federal. NPS units are superintendent-by-superintendent; BLM land needs a specific decision before a non-motorized trail is open to e-bikes, and OHV areas are open already.
- Your state law. Most states have adopted the three-class system, and some set the default path access in statute. Our classes and laws guide lays out what each class means and where the common exclusions fall.
- The sign at the trailhead. It overrides your reading of all of the above on the day.
One practical note on Class 2. The NPS rule prohibits using a throttle exclusively for an extended period without pedaling, except where public motor vehicles are allowed. So a throttle bike is not banned on NPS trails, but throttling along for miles without turning the pedals is — which, in practice, is how a lot of people ride a Class 2 bike.
What to carry, because there is nothing at the turnaround
A trail is the one place where a flat tire is a four-mile walk pushing a bike that weighs as much as you do. Three things earn their space: a multi-tool, a pump or inflator with the right valve, and a tube that matches your tire. Our flat-tire guide covers the part that is genuinely harder on an e-bike: a rear hub-motor wheel is heavy, it is wired to the frame, and the axle nuts are often torqued above what a bike torque wrench reaches.
Also take more battery than you think. The planning figure assumes sensible assist on rolling ground; crushed stone, soft sand and a headwind all push consumption up, and a fat tire pushes it up before you leave the car park. If your rides are consistently longer than a tank, how to increase e-bike range runs through the four fixes that work, cheapest first.
What we would actually buy
For most trail riders: the GoTrax F3.The class switch is the feature, not a gimmick — set it to Class 1 at a trail that says Class 1 only, set it to Class 3 for the road. 672 Wh is roughly 33 planning-figure miles, the torque sensor is nicer than a cadence sensor on a varying surface, and at 58.3 lb it is one of the few bikes here you can actually lift onto a rack.
For rail trails on a budget: the Retrospec Chatham Rev.Fixed Class 2, both UL listings published, upright and comfortable. 360 Wh is the constraint — call it 18 planning-figure miles, so a nine-mile-out rail-trail ride with a margin.
For rough surfaces under $1,000: the GoTrax Ranger.Fat tires and a stated Class 2, at the cost of 69.7 lb, which you will feel on every lift.
If you want fat tires and a class switch: the Aipas A2.The only bike that offers both, with the honest caveat that Aipas publishes no weight at all — so plan the rack before you plan the ride.