Radical Design is a dutch manufacturer that design products from the ground up. Hubert Van Ham owns and operates Radical Design and it is his specialty to design for simplicity, functionality and durability.
Rather than modify existing ideas, Hubert's designs are created from a blank slate.

Radical Racer Pannier:

Radical Racer Panniers
Radical Racer Pannier are available for narrow seats (top 2 images) and wide seats (bottom 2 images)

In Hubert's own words:
"I try to make my designs basic, functional and well-fitting, while repairable with common tools. By using proven materials and rounded shapes, I am dedicated to make our bags last a very long time."

Radical Solo Racer:

Radical Solo Racer Panniers on a Bacchetta Corsa with Euromesh Seat
Radical Solo Racer on a Bacchetta Corsa with Euromesh Seat

From Luke @ Perennial Cycle:
"Importing products from overseas adds challenges that are difficult to justify, but our relationship with Radical is going on 20 years and Hubert's products always make the challenge worth overcoming!"

Radical Side Pannier:

Radical Side Panniers come for narrow seats (top 2 images) and wide seats (bottom 2 images)
Radical Side Panniers come for narrow seats (top 2 images) and wide seats (bottom 2 images)

Radical Design Pannier Summary:

Racer Pannier: Big enough to carry a serious amount of gear. If you're commuting or doing some *credit card touring these will work out beautifully for you. The Racers Panniers fit onto the seat of the bike and do not require a rack. The NARROW model will fit your recumbent's hardshell or euromesh seat while the WIDE will fit a standard US style seat like a Bacchetta Recurve, RANS Standard Mesh, Easy Racers Cobra, ICE Trike Mesh, Catrike plus others. The Racer Panniers can be mounted nicely using a rack as an alternative to the seat mount (click here to see).

Side Panniers (med & lg): Radical Design Side Panniers are for those looking for no limits to their options. A rear rack is required for these bags to fit your recumbent. The idea behind these bags is to keep the weight low and forward. This way you can carry large and heavy loads, yet the weight is placed to have the least effect on your 'bent's handling. Add a racktop bag and a seat bag and you are set to camp your way across the continent(s) of your choice. The NARROW model will fit your recumbent's hardshell or euromesh seat while the WIDE will fit a standard US style seat like a Bacchetta Recurve, RANS Standard Mesh, Easy Racers Cobra, ICE Trike Mesh, Catrike plus others.

Banana Racer Panniers: Same bags as the Racer Panniers (above), but with a more versatile mounting system that can be modified to fit either wide seats, or the narrow seats. If you have a couple of recumbents in the garage and they use a mix of wide and narrow seats, then the Banana Racers will suit you well. The Banana Racer Panniers can be mounted nicely using a rack as an alternative to the seat mount (click here to see).

*Credit card touring: a type of touring that isn't restricted in distance, but would typically not need a large volume of carrying capacity because camping and cook gear are left at home.

Here are some videos with Radical Racer Panniers:

Here are some videos with Radical Side Panniers:

Here is a video with the Solo Racer: