Brompton Roll-Top Front Bag – 27.5L, Laptop & Commuter Bag
Fits Line: A-Line, C-Line, P-Line, T-Line, G-Line
Most Brompton front bags are small. Great for quick trips, not so great when you actually need to carry things.
This roll-top bag gives you 27.5 litres of space, a dedicated laptop compartment, side pockets for quick access, and a rain cover — all on the front of your Brompton. Off the bike, it works as a shoulder bag or backpack. It's the bag for people who ride to work, not just around the block.
How it works
The bag clips onto your Brompton front carrier block — the standard mounting system used on all Brompton lines. If you already have a carrier block, choose Set 1. If you don't have one yet, choose Set 2 which includes a compatible block.
Important: this bag requires a front carrier block. If your bike doesn't have one and you order Set 1, you won't be able to attach the bag. Not sure if your bike has a carrier block? Check the front of your frame just below the handlebar stem — if there's a black plastic block with two holes, you're good to go.
Key features
- 27.5L capacity — main compartment (22.2L) + front pocket (1.7L) + back pockets (3.6L)
- Laptop compartment — fits laptops up to 16 inches
- Roll-top closure — expands as needed, seals out dust and light rain
- Side pockets — quick access for your water bottle, phone or tools
- Retractable hook — pull-out steel cable hook (up to 60cm) for hanging your helmet or keys
- Rain cover included — hi-vis yellow with reflective strip, fits over the whole bag
- 4 carry modes — on the bike, by hand, shoulder bag, or backpack
- Replaceable UK flag patch — velcro-mounted, swap it for your own if you prefer
Honest note on backpack mode: it works, but it's not comfortable for long walks. This bag is at its best on the bike or as a shoulder bag.
Available variants
- Set 1 — bag + frame + straps + rain cover + hook + UK flag patch. Choose this if you already have a front carrier block on your Brompton.
- Set 2 — everything in Set 1, plus a compatible 2-hole carrier block. Choose this if your bike doesn't have a carrier block yet.
Got a question?
Not sure which set to choose? Send us a photo of the front of your bike and we'll confirm it for you.
Specs
| Material | 900D nylon oxford (outer), polyester (lining) |
| Capacity | approx. 27.5L |
| Dimensions | 39 × 30 × 19cm |
| Weight | approx. 1.35kg |
| Laptop size | up to 16 inches |
| Hook cable | up to 60cm, 0.8mm diameter |
| Compatibility | Brompton A, C, P, T and G Line with front carrier block |
Why order from Foldrio?
Because we've been in the Brompton accessories world since 2019 — and we stand behind everything we sell.
Every item tested for Brompton compatibility
We don't list a product until we're confident it works. No guesswork, no surprises.
2 year warranty on all products
Our warranty, not the manufacturer's. If something fails, we fix it.
100% money-back guarantee
Not happy? We refund. No questions asked, no forms to fill.
Free worldwide shipping
Always included. No fees at checkout, nothing due on delivery.
Guaranteed delivery
If your order doesn't arrive, we send a free replacement.
Fast support from people who know Brompton
Questions about compatibility, installation or your order — we respond quickly.
No hidden costs
The price you see is the price you pay. No import fees, no customs charges, nothing due on delivery.