Jasion RetroVolt 330

This is the same retro moped silhouette that owns Amazon's fat-bike chart: a long flat bench, a round caged headlight, high-rise bars and 4-inch knobby tires. The closest rival is the TST Fat Retro at $579.99 (as of Oct 31, 1:00 PM EDT, subject to change), which also quotes peak wattage only and no top speed, so neither bike wins on paperwork. The RetroVolt's edge on paper is the passenger-ready bench, a 330 lb payload rating, and a bundle of rider-facing extras the listing names: a large headlight with a horn, a rear brake light, five riding modes, and 85% pre-assembly.

Suspension is real at both ends as far as the imagery shows. Jasion's own product photos show a coil shock under the seat frame in addition to the front fork, which is more than several "dual suspension" listings we have reviewed, where the rear half turned out to be a sprung seatpost. We cannot tell its travel or quality from photos.

48 V x 15 Ah is 720 Wh. A realistic e-bike uses 15-30 Wh per mile depending on rider weight, speed, assist level and terrain, and a heavy fat-tire bike with a 2000 W peak motor lives at the upper half of that range. So:

• 720 Wh / 30 Wh per mile = 24 miles (throttle-heavy riding at speed)
• 720 Wh / 20 Wh per mile = 36 miles (moderate assist)
• 720 Wh / 70 miles = 10.3 Wh per mile, which is what the "up to 70 miles" claim requires

That last figure is below what any bike of this size achieves outside a light rider in the lowest assist level on flat ground with a tailwind. The 70-mile claim fails the arithmetic. Plan on 30-35 miles, fewer with a passenger.

The listing and the manufacturer also disagree about the pack. Amazon sells a 15 Ah battery; Jasion's store lists the RetroVolt 330 with 18 Ah (864 Wh) and the same 70-mile claim. Even at 864 Wh the claim needs 12.3 Wh per mile, still optimistic. The Amazon page is the one we link, so the 720 Wh figure is what you should expect to receive. Charging takes 5-6 hours per the listing.

Under the US three-class framework, Class 1 and Class 2 cap at 20 mph, and Class 3 allows 28 mph with pedal assist only, with a throttle not permitted in most states. The federal definition of a low-speed electric bicycle (15 U.S.C. §2085) is written around 750 W rated output.

The Amazon listing gives only a 2000 W peak, and its title says 30 mph. Jasion's own user manual (dated October 23, 2026) supplies the figures the listing leaves out: a 750 W rated motor and 28 mph. As shipped, with a throttle and a 30 mph claim, it is not a street-legal e-bike in any state. Seven jurisdictions ban Class 3 outright (DC, Kentucky, Massachusetts, Montana, North Carolina, Pennsylvania and South Carolina), and this sits above Class 3.

The same manual documents the two display settings that decide the legal question. P07 sets the speed limit and P08 switches the throttle off (0 enables it, 1 disables it). With the throttle off and assistance stopping at or under 28 mph, the RetroVolt has the shape of a Class 3 e-bike on a 750 W rated motor; with a 20 mph limit it meets the Class 2 speed rule. Jasion does not say what range P07 accepts, so set it on your own display and keep the manual with the bike, because the Amazon listing alone still shows only the peak figure. If a legal commuter matters more than the moped format, Jasion's EB5 MAX at $579.99 (as of Oct 31, 1:00 PM EDT, subject to change) publishes a 750 W rated motor and a 28 mph Class 3 speed. Check your state on our street-legal-by-state guide before you buy.

The listing describes "UL-certified battery safety protection" but does not name a standard, and neither UL 2271 (the battery pack) nor UL 2849 (the complete electrical system) is documented on the listing or on Jasion's product page, whose infographic shows a UL logo with no standard or certificate number. If your building or city requires UL 2849 for indoor charging, ask Jasion for the certificate before buying. Among Jasion bikes, the Roamer ST names UL 2849 in its listing title.

The listing gives a rider height range of 5'4" to 6'3". Jasion's geometry table lists a minimum saddle height of 86 cm (about 34 inches) and a 69 cm standover, so riders at the short end of that range should expect to tip the bike to put a foot down at a stop. The seven-speed drivetrain helps when pedalling a heavy fat bike, and Jasion's infographic names hydraulic disc brakes, which the Amazon bullets we captured do not mention. No weight is published on either page, and a steel-framed 20 x 4 moped bike with a 720 Wh pack is not light; budget for that if it has to go up stairs.

Jasion makes two 26-inch fat bikes worth comparing if the RetroVolt does not fit. If the tall saddle is the problem, the Jasion Thunder at $699.99 (as of Oct 31, 1:00 PM EDT, subject to change) is a step-through on 26 x 4 tires with a larger 864 Wh battery and a stated rider range of 5'2" to 6'3", though it is also advertised at 30+ mph, has no rear suspension and weighs 82 lb. The Jasion Thunder Pro at $999.99 (as of Oct 31, 1:00 PM EDT, subject to change) adds a coil rear shock and a 1,040 Wh pack, but its 1200 W rated motor and 35 mph top speed make it an off-road machine at any setting, and Jasion support puts its rider-plus-cargo limit at 270 lb, so it cannot stand in for the RetroVolt's passenger bench.

A second Amazon listing sells the same RetroVolt 330 frame bundled with mirrors, a lock and a seat pad at a higher price, and it is our backup link if the main one goes out of stock. Avoid the listing sold as a two-bike pack unless you actually want two bikes.