Brompton Seatpost Carrier Block – Rear Mount for Front Bags
Fits Line: A-Line, C-Line, P-Line, T-Line, G-Line
Give your front bag a place behind the saddle.
This seatpost carrier block lets you carry a compatible Brompton front bag or basket behind the saddle.
How it works
Fit the quick-release mount to your seatpost, then attach your bag to the carrier block using its existing front carrier fitting.
Key features
- Positions a compatible bag or basket behind the saddle.
- Uses a quick-release clamp for attaching and removing the mount.
- Comes in black with a choice of nylon or aluminium alloy carrier block.
Available variants
- Classic Set includes a nylon carrier block and seatpost mount.
- Alloy Set includes an aluminium alloy carrier block and seatpost mount.
Got a question?
Unsure about the fit? Send us a photo of your seatpost and your bag’s mounting plate.
Specs
| Mounting position | Seatpost, behind the saddle |
| Bag fitting | Compatible Brompton front carrier block fitting |
| Colour | Black |
| Included | Seatpost mount and your chosen carrier block |
| Sold separately | Bag and basket |
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.