# What are the lightest expandable wheeled backpacks on the market? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What are the lightest expandable wheeled backpacks on the market?

## Products

### Ortlieb Duffle RG 34L
```yaml
product: ortlieb-duffle-rg-34l
brand: Ortlieb
price_gbp: 185.09
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: 98.8 oz
capacity: 34 L
wheel_type: 100 mm wheels
number_of_pockets: 2
collapsed_dimensions: 55 x 35 x 23 cm
```

- **Price:** £185.09 [^1]
- **Summary:** The Ortlieb Duffle RG 34L is a waterproof, IP67-rated travel bag with an aluminum wheel frame, telescoping handle, backpack straps, and rugged underside. Its compact carry-on size suits short trips, active travel, and travelers who need flexible wheeled or backpack carrying options.
- **Ideal For:** It suits travelers seeking a lightweight expandable wheeled backpack because it weighs 98.8 oz, has 34 L of capacity, 100 mm wheels, and removable padded backpack straps, although no expanded capacity is listed.
- **Additional Sources:** [^2], [^3]

---
## References & Sources
[^1]: Ortlieb, accessed 2026-09-13. https://us.ortlieb.com/products/duffle-rg
[^2]: Holland Bike Shop, accessed 2026-09-13. https://hollandbikeshop.com/en-gb/bicycle-bags/ortlieb-bags/ortlieb-travel-bags/ortlieb-travel-bag-duffle-rg-k12001-34l-black/
[^3]: Ridewill, accessed 2026-09-13. https://www.ridewill.com/p/en/ortlieb-ordur34n-duffle-bag-rg-34-k12001-black/1593207/