The TV segment can be watched on this Brightcove video.
Presenter Jon Bentley and Olympic gold medal winner Rebecca Romero rode Brompton's, Strida's and two LX folding mountain bikes from Montague Swissbike.
The Brompton came out on top, with the top show rating of five Gs.
The Strida got a one G rating because it was deemed difficult to ride, although Bentley and Romero liked the way it could be wheeled along. Bentley nearly did a headplant when he pulled on the Strida's brakes, being more powerful than he thought they would be. In a previous show, the Strida did rather better, as this YouTube clip demonstrates.
The Swissbike LX got a four G rating.
Romero said: "I think it's a good, comfortable mountain bike, a mountain bike that's got the convenience of being able to fold it up"
Back in the studio, Gadget Show anchor Jason Bradbury rode the Brompton and said he felt "cool" riding it. He said it was a "timeless" design.