CEMOTO B28 (EB28) — 27.5" Electric Mountain Bike
A 27.5-inch electric mountain bike with a 500W motor, 48V 13Ah battery and alloy suspension fork, built for stability and manoeuvrability on steep hills and rocky paths.
Product page: cemotoride.com/products/cemoto-eb28a-emountain-bike
Overview
The CEMOTO B28 — sold on the store under the handle cemoto-eb28a-emountain-bike and titled CEMOTO EBIKE B28 — is the 27.5-inch mountain eBike in the CEMOTO range.
Its 27.5-inch wheels are a deliberate middle ground: larger than 26-inch wheels for better rollover and stability, smaller than 29-inch for quicker handling in tight terrain. CEMOTO describes the result as a blend of stability and manoeuvrability that makes it easy to tackle steep hills and rocky paths.
The 500W brushless motor is the lowest-rated motor in the CEMOTO eBike line, paired here with a 48V 13Ah pack — the smallest battery in the range. The design brief is a comfortable, capable all-rounder rather than a maximum-power machine: CEMOTO emphasizes rider comfort, an ergonomic frame, adjustable suspension, and confident grip on descents and sharp turns.
Naming note: this model is listed as B28 in the product title and page heading, but the store URL and handle use EB28A. Both refer to the same bike. It is a different model from the B28A (high-step fat tire) and the B28D (26" folding fat tire) — check the tire size and frame style to be sure which you have.
Available colors
The B28 is listed as a single-variant product. Color options are not published on the store listing.
For current pricing and availability, see the CEMOTO store listing.
Key specifications
| Specification | Value |
|---|---|
| Motor | 500W brushless |
| Battery | 48V 13Ah Li-ion |
| Charger | 54.6V 2A, UL-listed |
| Charge time | 6–7 hours |
| Fork | Alloy suspension (Lo) |
| Tires | 27 × 2.35 all-terrain |
| Brakes | Disc brakes |
| Top speed | 20 mph |
| Gears | SHIMANO 7-speed |
| Display | Color LCD, 4 inch |
| Frame | Aluminum 6061 |
| Load capacity | 120 kg |
Sizes and weight
| Measurement | Value |
|---|---|
| Net weight (N.W.) | 33 kg |
| Gross weight (G.W.) | 38 kg |
| Carton size | 148 × 23 × 82 cm |
| Load capacity | 120 kg |
| Wheel size | 27.5 inch |
Feature highlights
- 27.5-inch wheels — the balance point between rollover stability and tight-terrain agility
- 500W brushless motor — adequate for hills and loaded commuting, and gentler on battery consumption than the 750W models
- 48V 13Ah battery with 6–7 hour charge time — the quickest charging pack in the CEMOTO eBike range
- Alloy suspension fork — takes the edge off rocky paths and roots
- 27 × 2.35 all-terrain tires — wider than a commuter tire for grip off pavement, narrower than a fat tire for efficiency
- 6061 aluminum alloy frame — lighter and more corrosion-resistant than the carbon steel frame used on the EB66
- SHIMANO 7-speed gearing — climb under your own power when you want to conserve battery
- Color LCD display with 4-inch screen — readable speed, battery and trip data
What it is for
CEMOTO positions the B28 for riders who want trail capability and daily-commute practicality in one bike:
- Steep hills and rocky paths — the design brief called out these conditions specifically
- Muddy trails and smooth paths — the all-terrain tires and suspension cover both
- Long rides without range anxiety — a robust battery is cited as a core design goal, though the 13Ah pack is the smallest in the range. Plan carefully for long off-pavement rides; see Range Calculator
- Beginners and experienced riders — CEMOTO markets it as an excellent choice for both
Comparison with the other fat-tire models
| B28 | B28A | B28D | |
|---|---|---|---|
| Wheels | 27 × 2.35 | 26 × 4.0 (fat) | 26 × 4.0 (fat) |
| Motor | 500W | 750W | 750W (1,500W max) |
| Battery | 48V 13Ah | 48V 15.6Ah | 48V 15.6Ah |
| Frame | 6061 alloy | 6061 alloy, high step | 6061 alloy, folding |
| Brakes | Disc | Hydraulic disc (XOD) | Hydraulic disc (XOD) |
Choose the B28 for efficiency and lighter weight; choose a fat-tire model for sand, snow, loose gravel and a softer ride.
Range and performance notes
Published figures are manufacturer-stated maximums under controlled test conditions (typically a 70 kg rider, 25 °C and 20 km/h constant speed). The 500W motor and 13Ah pack combination means the B28 has the least energy capacity in the CEMOTO eBike range — 48V × 13Ah ≈ 624 Wh. For a structured estimate under your own conditions, see Range Calculator.
The manual's advice applies directly here: to save energy and extend battery life, use pedal assistance when climbing a slope or riding into wind. Low tire pressure increases resistance and reduces range — check air pressure frequently.
Safety and legal notes
- Wear an approved helmet and observe all road rules for the area where you ride.
- Confirm your local eBike rules. See Riding Laws & Compliance.
- eBikes are single-rider vehicles. Never carry a passenger.
- Intended terrain: eBikes are for on-road or improved-trail use. Avoid riding rough trails — damage may occur. Learn the trail rules and stay within the bike's limits.
- Do not ride through deep water, and avoid prolonged riding in rain. When riding in bad weather, braking distance increases.
- Chain tension should be about 15 mm. See Drive & Transmission.
Images
B28 — official product photography.
Main view
Detail 1
Detail 2
Detail 3
Related pages
- eBikes & Scooters Overview
- B28A High Step Fat Tire
- B28D Folding Fat Tire
- eBike Manuals
- Tires, Wheels & Suspension
- Range Calculator
Note: All performance figures are manufacturer-stated maximums and are not simultaneous guarantees. Specifications are subject to change without notice.