Doubling another person on your bike isn’t always the easiest (or safest, or most legal) thing to do, particularly if you have them perching on the handlebars, or sitting on the saddle while you stand up and pedal. Things are somewhat easier if they sit on your rear rack, but that’s not what it’s designed for. The Companion Bike Seat, however, is designed for just that purpose.
The Companion has the same basic form as a rear rack, but includes a padded seat cushion, foot pegs, and is sturdy enough to support a rider weighing up to 200 lb (90.7 kg). Beneath the hinged seat is a splashproof lockable storage box, should you wish to also carry some inanimate cargo.
The rig weighs 8 lb (3.6 kg) and reportedly fits onto a variety of frame sizes and styles, that incorporate wheels up to 26 inches in size. A rear thru-axle that uses locking nuts (as opposed to quick release levers) is required in order to attach the foot pegs.
Potential buyers can pre-order the Companion Bike Seat now, for US$124.95. The first 100 orders are expected to ship on or before Sept. 6th.
Source: Companion via BikeRadar
Tandem bikes are engineered for the extra weight, having reinforced wheels, usually very strong brakes compared to an average 'city bike', a much longer frame, and most importantly, an extra set of pedals.
This seat idea might be fine for a kid who has outgrown a child seat however. I'd still want to see better footpegs and something to prevent feet accidentally getting caught in the spokes or gears.
I did a patent search for him and found various versions of the seat patented as far back as 1890.
will cause:
flat tires bent axles broken spokes
wle
This is so old as the way to Rome. My mother brought me to school on her bike about 50 years ago. That one was even better because the cushion could be mounted on whatever good and stable carrier. not this flimsy thin wire-frame that is shown on the images
BTW. this is forbidden for safety reasons in some countries and right so. Have you ever had your heals in the wheel? it hurts. and you will fall both of you on the street under a bypassing car ......