The Ridstar S29 Pro Slimline is a mountain e-bike with a 1000 W motor and a 749 Wh battery. It weighs 28.1 kg, which is 15% below the median for its type. That lighter build is the number that most sets it apart from other mountain e-bikes in the MathBikes database.
You get a 48 V system with 15.6 Ah of charge and a top speed of 55 km/h. The price is 899 USD, which is 40% below the median for this type. It suits riders who want a full-size mountain e-bike without paying the typical price. It does not fold and it is not built for cargo.
What the numbers say
| Spec | This bike | Median for its type |
|---|---|---|
| Battery | 749 Wh | 816 Wh |
| Weight | 28.1 kg | 33.1 kg |
| Torque | not listed | 80 Nm |
| Estimated range | 43 km | 47 km |
| Price | 899 USD | 1499 USD |
Questions people ask about this model
How much does it weigh?
It weighs 28.1 kg. That is 15% below the median for its type, which is 33.1 kg. A lighter bike is easier to lift onto a rack and to steer on tight trails. It is still a heavy machine, so plan for that when you store it.
How much torque does it have?
The torque is not published. The median for this type is 80 Nm, but you cannot compare this bike to that figure because the number is missing. You should ask the seller for the torque before you buy. Without it, you cannot judge how it will climb steep ground.
What speed class is it?
The speed class is not listed. The top speed is 55 km/h, which is a specification, not a class label. Many places limit where and how you can ride a bike that goes this fast. Check your local rules before you ride it on public paths.
How far does it really go?
The maker claims 56 km. The MathBikes estimate is 43 km, with a band of 38 to 49 km. That estimate is 23% below the claim. The estimate uses one reference ride for every bike on the site: Tour assist, rolling terrain, mild weather, brisk pace, and an 80 kg rider. It is not a measurement. You can run your own numbers with the range calculator.
What does it cost to run?
The price is 899 USD, which is 40% below the median for its type. Running costs depend on your electricity price and how far you ride. The battery holds 749 Wh, so a full charge uses less than a unit of household power in most places. Use the cost calculator to work out your own figure.
Where it falls short
The battery is 749 Wh, which is 8% below the median for its type. The estimated range is 43 km, which is 9% below the median. So you trade some distance for the lower weight and the lower price. The torque is not published, so you cannot tell how strong it feels on a climb. The warranty is not listed either, which leaves you without a stated safety net.
Who should buy it
This bike fits riders who want a mountain e-bike at a low price and do not need the biggest battery. The 28.1 kg weight helps if you lift the bike often. The 55 km/h top speed gives you headroom on open ground. It is a poor fit if you need a published torque figure or a stated warranty.
- You want a mountain e-bike and your budget is tight. At 899 USD it is 40% below the median for its type.
- You lift or carry your bike and want less weight. At 28.1 kg it is 15% below the median.
- You ride short to medium trips and can live with a 43 km estimate. That is 9% below the median for its type.
Look elsewhere if you need a long range or a big battery. The 749 Wh pack is 8% below the median and the estimate is 43 km. Look elsewhere if you need a published torque figure or a warranty, because neither is listed. And look elsewhere if you need a folding frame or cargo capacity, since this bike has neither.
