Chain gears are favored by cyclists for their combination of a chain and cassette, offering precise gear options and efficient energy use. They are ideal for mountainous terrains and long tours, allowing smooth shifts and easy component replacements. In contrast, hub gears feature an enclosed mechanism for reduced maintenance and protection against dirt, making them better for leisurely rides. Both systems have been evaluated, with top-performing e-bike models highlighted for trekking purposes.
Understanding Chain Gears
Chain gears are a popular choice among cyclists, featuring a combination of a chain and a cassette made of sprockets that provide various gear options. In e-bikes equipped with a mid-motor, gear shifting typically occurs at the rear wheel. The gear system includes a fixed ratio at the bottom bracket, while a derailleur at the rear facilitates gear changes. One of the standout benefits of chain gears is their precise gear gradation, which contributes to a comfortable cadence and efficient energy use. Additionally, the cassette can be easily replaced to tailor the gears to specific riding preferences. However, it’s essential to perform regular maintenance and cleaning to ensure optimal performance, especially keeping the chain and sprockets free from dirt. A minor downside is the risk of getting pant legs dirty during rides.
Who Benefits from Chain Gears?
Cyclists navigating mountainous terrains or embarking on long tours can gain significant advantages from chain gears. They allow for smooth gear transitions, even when under load, provided the bike isn’t excessively heavy. Moreover, individual components can be replaced in cases of wear or damage, making repairs cost-effective, especially for those with some mechanical know-how. To cater to the demands of e-bikes, manufacturers have introduced specialized systems like Shimano Linkglide, which, while slightly heavier, offer enhanced durability.
Exploring Hub Gears
In contrast to chain gears, hub gears also utilize a chain for power transmission but do not include a cassette. Instead, they feature a thicker rear hub where the entire shifting mechanism is enclosed. This design offers excellent protection against dirt, as the internal components operate within a closed oil or grease bath, ensuring consistent lubrication. Consequently, maintenance is significantly reduced compared to chain gears. Experts recommend opening the hub once a year to refresh the lubricant. While some mistakenly believe hub gears are maintenance-free, they are less susceptible to issues than their chain counterparts. Although most hub gears feature fixed gears, there are also rare models that offer continuously variable gearing, akin to an automatic car transmission. With fewer components overall, hub gears may require a chain tensioner depending on the design, though certain dropout styles eliminate the need for this part. Hub gears are typically paired with a chain cover to keep pant legs clean, and the combination of hub gears with a carbon belt is often hailed as the ‘ideal solution’ for low maintenance and quiet operation.
Who Should Choose Hub Gears?
Hub gears are known for their slower and less agile shifting compared to chain gears. Shifting requires a brief pause in pedaling, making it unsuitable for high-load scenarios. Therefore, hub gears are better suited for flat terrains and leisurely riders who value low maintenance over high-performance shifting.
The Top E-Bike Models
Both chain and hub gear e-bikes have been rigorously tested by Stiftung Warentest and our dedicated test center. Below is a summary of the top-performing models from our e-bike assessments.
Best Trekking E-Bikes
| Model | Test Rating | Price |
|---|---|---|
| Kalkhoff Endeavour 5 Advance+ | 1.8 (good) | €3,000 (Bike XXL) |
| KTM Macina Gran 610 | 1.8 (good) | €2,650 (Bike XXL) |
| Cube Kathmandu Hybrid One 625 | 2.0 (good) | No further offers |