Ortlieb Back Roller Pro Classic vs Topeak TrunkBag DXP
Two very different commuter-cargo approaches: Ortlieb's pannier pair (40 L) versus Topeak's rack-top trunk bag with fold-out side panniers. Payload, weatherproofing, and how you carry it off the bike decide which one fits your commute.
- Capacity: 40 L total (20 L per side)
- Construction: PVC-coated 1000D nylon, welded seams
- Waterproof rating: IPX4 roll-top
- Mount: QL2.1 quick-release
- Rail compatibility: 8-16 mm tubular
- Weight: 900 g (per pair)
- Reflective panels
Sizing: Fits any standard rear rack with 8-16 mm tubular rails. Per-side mounting is rock-stable. The most popular touring pannier worldwide.
MSRP: $199-249 · Amazon ~$190.00
- Capacity: 17.5 L (with fold-out side panniers)
- Construction: water-resistant synthetic leather
- Waterproof rating: water-resistant + included rain cover
- Mount: Topeak MTX QuickTrack
- Rail compatibility: 8-16 mm rails (MTX adapter)
- Weight: 550 g
- Reflective panels
Sizing: Sits on top of an MTX-compatible rear rack. Quick-release lets you pull it off and carry it like a bag. Not built for heavy touring loads.
MSRP: $119-149 · Amazon ~$154.27
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Side-by-side spec sheet
| Aspect | Back Roller Pro Classic | TrunkBag DXP | Winner |
|---|---|---|---|
| Total capacity | 40 L (20 L per side) | 17.5 L (expanded) | Pro Classic |
| Waterproofing | IPX4 roll-top, welded seams | Water-resistant + rain cover | Pro Classic |
| Mount system | QL2.1 pannier hook | MTX QuickTrack | Tie |
| Rack compatibility | Any 8-16 mm tubular rack | MTX-compatible rack only | Pro Classic |
| Off-bike carry | Shoulder strap (per bag) | Shoulder strap + handle | TrunkBag DXP |
| Weight | 900 g (pair) | 550 g | TrunkBag DXP |
| Best use | Commute, tour, all-weather | Errands, light commute | Tie |
| Amazon price | $190.00 | $154.27 | TrunkBag DXP |
The verdict
Pick the Ortlieb Back Roller Pro Classic if you commute in real weather or tour - the welded roll-top is still the gold standard for keeping a laptop and groceries dry, and the 40 L pair handles a serious load. Pick the Topeak TrunkBag DXP if you want one bag that lives on the bike, locks onto an MTX rack in a second, and only expands into side panniers when you grocery-shop.
Best value
Topeak TrunkBag DXP - one bag covers rack-top + fold-out panniers for under the price of a single pannier pair.
Best performance
Ortlieb Back Roller Pro Classic - genuinely waterproof welded roll-top, 40 L capacity, and tour-proven QL2.1 hooks fit any standard rack.
Not sure which bags & panniers fits you?
Our sizing guides and category pages help you narrow the field.