Throttle and public-road use in Great Britain
A 250W label or 25km/h setting alone does not establish EAPC compliance. The complete cycle must have usable pedals, no more than 250W maximum continuous rated motor power, an assistance cut-off at 15.5mph, and the required markings and safety equipment. Walk assist limited to 3.7mph (about 6km/h) is outside the throttle type-approval requirement. A twist-and-go cycle introduced after 1 January 2016 that can propel itself without pedalling beyond walk-assist speed requires type approval or individual approval, even if it meets the EAPC power and speed limits. An approved twist-and-go EAPC can still be treated as a pedal cycle; a throttle does not automatically make every bike unlawful.
Using pedal assist, avoiding the throttle or choosing a lower display setting does not establish compliance. Department for Transport guidance also treats cycles with a selectable mode capable of motor propulsion above 15.5mph as motor vehicles. Where the supplied configuration or required approval has not been verified, do not use the bike on public roads or cycle paths as an ordinary EAPC. Use only on suitable private land with permission unless the applicable road-use requirements are met. Read the official EAPC and throttle guidance.
Short answer: the Aairsk GT900 is a 250W dual-suspension electric mountain bike with a 36V 13Ah battery, 26-inch wheels and Shimano 21-speed gearing, priced at £489.99 with free UK delivery from UK stock. It suits riders who want a comfortable, low-cost e-MTB for towpaths, bridleways and hilly routes. If you mainly ride smooth roads, the lighter and cheaper Aairsk GT300 is the better buy.
Aairsk GT900 key facts
| Price | £489.99, free UK mainland delivery |
|---|---|
| Motor | 250W |
| Battery | 36V 13Ah |
| Assisted top speed | 25km/h (15.5mph) |
| Range, pedal assist | 40 to 60km (25 to 37 miles), supplier estimate |
| Range, throttle only | 30 to 40km (19 to 25 miles), supplier estimate |
| Charging time | 5 to 6 hours |
| Wheels | 26-inch |
| Gears | Shimano 21-speed |
| Suspension | Front and rear |
| Warranty | 12 months |
What the GT900 does well
Comfort on rough ground. Front and rear suspension is the reason to choose the GT900 over a hardtail. Potholes, gravel tracks and canal towpaths feel noticeably smoother, which matters on longer rides where a rigid rear end becomes tiring.
Gearing for hills. A 250W motor gives a helping hand rather than a push up steep climbs. The 21-speed Shimano gearing gives you a much wider spread of ratios than the 7-speed setups found on most budget e-bikes, so you can keep a comfortable cadence on climbs and still have a useful top gear on the flat.
Price. Dual suspension, 21 gears and a 13Ah battery for under £500 is strong value in the UK market. It is held in UK stock, so there is no import wait and no customs charge on delivery.
What to be aware of
Range depends on how you ride. The 40 to 60km figure assumes you pedal with the motor. Hills, headwinds, cold weather, soft tyres and rider weight all reduce it, so plan journeys around the lower figure. In winter, expect less.
The throttle and UK road rules. The GT900 is supplied with a thumb throttle. Road-use compliance has not been verified for the exact supplied configuration. A 250W rating and 25km/h setting alone are insufficient: throttle behaviour, maximum continuous motor rating, selectable modes and any required vehicle approval must also be checked. Do not use this bike on public roads or cycle paths as an ordinary EAPC unless those requirements are confirmed.
It is a leisure e-MTB, not a trail race bike. It is built for bridleways, forest tracks and rough commuting, not jumps or technical downhill riding.
GT900 vs GT300 vs XT90
The GT300 (£429.99) is the simpler commuter: front suspension only, 7-speed gears and a smaller 36V 10Ah battery. Choose it for smooth roads and short commutes.
The GT900 (£489.99) adds rear suspension, 21 gears and a bigger 13Ah battery for £60 more. For most riders who go off tarmac, that is the better value of the two.
The XT90 (£649.99) moves up to a 48V 20Ah battery for the longest range in the Aairsk line-up. Choose it if you regularly ride further than the GT900 can comfortably manage.
For a side-by-side table, see our GT300 vs GT900 comparison and the best budget electric mountain bikes for 2026.
Who should buy the Aairsk GT900?
- Riders on towpaths, bridleways, gravel and pothole-heavy roads who want comfort.
- Anyone in a hilly area who wants a wide gear range alongside motor assistance.
- First-time e-MTB buyers who want dual suspension without spending over £500.
It is not the best choice if you need to carry the bike upstairs often, want the longest possible range, or only ride short, flat, smooth commutes.
Aairsk GT900 FAQs
How fast does the Aairsk GT900 go?
Motor assistance stops at 25km/h (15.5mph), the UK limit for an EAPC. You can pedal faster under your own power.
How far does the Aairsk GT900 go on one charge?
The supplier estimates 40 to 60km (25 to 37 miles) with pedal assist and 30 to 40km (19 to 25 miles) on throttle alone. Real-world range varies with hills, weather and rider weight.
How long does the GT900 battery take to charge?
Around 5 to 6 hours from empty. Charge indoors at room temperature and avoid leaving the battery completely flat for long periods.
Is the Aairsk GT900 road legal in the UK?
Road-use compliance has not been verified for the exact supplied configuration. A 250W rating and 25km/h setting alone are insufficient: throttle behaviour, maximum continuous motor rating, selectable modes and any required vehicle approval must also be checked. Do not use this bike on public roads or cycle paths as an ordinary EAPC unless those requirements are confirmed.
Does the GT900 have rear suspension?
Yes. It has front and rear suspension, which is the main difference from the GT300.
What warranty and returns come with it?
A 12-month warranty, plus the 14-day right to cancel under the Consumer Contracts Regulations 2013 and your rights under the Consumer Rights Act 2015. It is sold by Horizon and Co Solutions Ltd, a UK registered company (No. 16942003).
Verdict
The Aairsk GT900 is one of the most comfortable ways to get onto an electric mountain bike for under £500 in the UK. Dual suspension and 21-speed gearing are the standout features, and the 13Ah battery is sensible for leisure rides. Be realistic about range and obtain confirmation of throttle operation and any required approval before considering public-road use.
View the Aairsk GT900: £489.99 with free UK delivery
Specifications and range figures come from the supplier and are estimates, not guarantees. Prices correct at the time of publishing.