Anyone with a powerful e-bike with an 800W motor knows that the accompanying battery is considerably larger than a standard e-bike battery. These batteries are often 40 to 50 cm in height and don't fit in just any bike bag. I searched for bike bags with a length over 40 cm. Below are 2 affordable rack panniers that are large enough to safely transport an 800W battery.
Panniers at least 40 cm high
1. VAUDE Road Master Roll-It
The VAUDE Road Master Roll-It is a single rear pannier with external dimensions of 40 × 33 × 18 cm and a capacity of 18 + 4 litres (22 litres total). It weighs 670 g and VAUDE specifies a maximum load of 10 kg. The lockable QMR 2.0 system fits rack tubes 8–16 mm in diameter. The bag has a large main compartment, an external zipped pocket and reflective elements. A rain cover is included; the bag itself is water-repellent, not fully waterproof.
Click the photo for this model’s official site
VAUDE Road Master Roll-It
Prices in other countries
Prices from 10 November 2026, excluding AliExpress. Clicking a price shows today's current price; use “Prices in other countries” to compare countries.
VAUDE naturally offers more models: click here to view all their models that meet the minimum height of 40 cm.
Ortlieb also has an extensive range, but check the height of each bag. View Ortlieb's panniers and bike bags.
2. Decathlon Bike Bag 100
The Decathlon Bike Bag 100 (from the in-house brand ELOPS) is a simple, practical rear bag for the luggage rack with a height of 40 cm, a width of 36 cm and a depth of 12 cm. With a capacity of 15 liters, this is the most compact bag on this list, but it meets the 40 cm height requirement. The bag can be attached and removed in one motion without tools. With a rating of 4.6/5 from 679 reviews, this is a popular and reliable choice. The bag is not fully waterproof, but is splash-resistant. Price: EUR 14.99 at Decathlon — by far the cheapest option.
Comparison
| Model | Length | Volume | Type | Weight | Price |
|---|---|---|---|---|---|
| VAUDE Road Master Roll-It | 40 × 33 × 18 cm (buitenmaat) | 18 + 4 L | Rear bag (single) | 670 g | View at VAUDE |
| Decathlon Fietstas 100 | 40 cm (H) | 15 L | Rear bag (single) | Not listed | EUR 14,99 |
Which bag do you choose?
The Decathlon Bike Bag 100 is the budget option. The VAUDE Road Master Roll-It offers more capacity, a lockable QMR 2.0 system and an included rain cover.
The VAUDE Road Master Roll-It is available from VAUDE. The Decathlon Bike Bag 100 is available at Decathlon.
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