What is the main difference?
The NMAX and Aerox are both 155 cc scooters. On the versions reviewed here, you do not need to change gears while riding. Their clear differences are the rear brake and fuel tank: the NMAX is listed with a rear disc brake and a 7-litre tank, while the Indonesian Aerox STD has a rear drum brake and a 5.5-litre tank.
If a larger tank and rear disc brake matter to you, the NMAX offers both. If you prefer the Aerox's appearance, weigh that preference against the fit and price of the actual scooter. Neither is a definite buying winner based only on its name or engine capacity.
Which NMAX and which Aerox are being compared?
This article covers the NMAX 155 STD with a conventional ignition key and the Indonesian AEROX 155 STD: the two trims recorded on DrMotori's model pages and in Niroomotor's product listings. A trim is a version of a model with particular equipment. This comparison does not cover lookalike replicas, the Aerox Alpha or Turbo versions.
The supplier's pages do not identify the production year of these trims. Before buying, read the year and full version name in the documents for the actual scooter; do not assume that it has the equipment of a newer model.
Comparable differences at a glance
Scroll horizontally to see all columns.
| Feature | NMAX 155 STD | Indonesian Aerox 155 STD |
|---|---|---|
| Engine capacity | 155 cc | 155 cc |
| Transmission | CVT; automatic ratio changes | CVT; automatic ratio changes |
| Cooling | Liquid-cooled | Liquid-cooled |
| Front brake | Disc | Disc |
| Rear brake | Disc | Drum |
| Fuel tank capacity | 7 litres | 5.5 litres |
| Production year in the trim source | Not stated | Not stated |
The information in this table was checked against the supplier's pages for these two trims on 19 Mehr 1405 (October 11, 2026). Other figures, including power and dimensions, need more explanation or evidence for an accurate comparison; we do not use them to declare a winner for acceleration or comfort.
What changes in daily commuting?
On both scooters, you open the throttle and the transmission changes the ratio automatically. This system is called CVT: you do not change gears to move off or adjust speed as you would on a motorcycle with a manual clutch.
The choice is therefore not between automatic convenience and manual gear changes; both are automatic. The practical differences for you are foot space, the reach to the handlebars and how easily you can manoeuvre the scooter where you park. Sit on both before buying and assess how comfortably your knees, feet and hands are positioned.
A sportier appearance or the NMAX shape?
In the photos of these two trims, the Aerox has sharper lines and a black-and-orange two-tone body; the NMAX is shown in grey with a different shape ahead of the seat. This visual difference is part of their appeal. If you will see and use the scooter every day, your own preference matters too.
The Aerox's sporty appearance does not establish faster acceleration, and the NMAX's shape cannot guarantee greater comfort for everyone. Check passenger footrests and seating space separately. Try the under-seat compartment with the helmet and belongings you actually carry; its appearance alone is not enough.
What difference does a rear disc brake make?
The NMAX reviewed here has a rear disc brake: the pads act against a metal disc beside the wheel. The Aerox in this article has a rear drum brake, with brake shoes operating inside a round enclosure.
This changes the parts used and the maintenance required for the rear brake. A disc brake alone does not, however, establish the presence of ABS, or anti-lock braking. Verify whether ABS is fitted and which wheels it covers in the manual or reliable documentation for that version. For an explanation of the equipment, read the ABS versus CBS guide.
How much does the larger NMAX tank matter?
The listed NMAX tank is 1.5 litres larger than the Aerox tank. If fuel consumption and usage conditions are equal, it carries more fuel and can go longer before refuelling.
This difference does not establish either scooter's real-world range. Range is the distance covered on one tank and depends on consumption, the route and riding style. Without comparable testing, we cannot say exactly how many kilometres farther the NMAX travels or which uses less fuel.
Compare maintenance costs this way
- Obtain separate prices for each trim's oil, required filters, brake pads or shoes, and service labour.
- Check the cost and timing of transmission servicing, including the belt and its wear components, using the manual for that version.
- Record part prices together with the brand, quality and labour charge. Do not compare an original part for one model with a cheap part for the other.
- Ask a workshop in your city how long parts take to obtain. Stock at one shop does not mean easy availability in every city.
Consider initial costs alongside the purchase price
We do not have comparable parts and labour prices to declare which scooter costs less to maintain. We suggest writing down the purchase price, initial servicing costs and essential equipment together, then comparing two scooters of the same year and similar mechanical condition.
When buying used, the difference in condition between two examples can matter more than their differences on paper. The used-motorcycle buying checklist helps you begin the inspection with specific questions. An advertised price is also the seller's asking price; do not treat it as the final transaction price.
Which should remain on your shortlist?
Look more closely at the NMAX if a larger tank and rear disc brake are key priorities and the actual scooter fits you comfortably.
Keep the Aerox on your shortlist if you prefer its design and the particular example offers a better combination of seating fit, mechanical condition and total purchase-and-service cost. Do not equate liking its appearance with expecting faster acceleration.
For the final decision, compare the price and condition of the two scooters with the equipment fitted to their specific years and trims. The Yamaha name or the number 155 does not replace those checks.
Explore both trims on DrMotori
Sources for this comparison
On 19 Mehr 1405 (October 11, 2026), we reviewed Niroomotor's NMAX 155 STD page and Niroomotor's Indonesian AEROX 155 STD page. The table uses the engine capacity, transmission, cooling, brakes and tank capacities stated on those two pages. This article is not a road-test report. The trims' production years and evidence-based comparisons of acceleration, fuel consumption and maintenance costs remain unconfirmed.
