It depends of load type:
http://www.bikesatwork.com/
http://www.bakfiets.nl/
http://www.christianiabikes.com/
http://www.workcycles.com/workbike/
http://nihola.info/
http://www.worksman.com/
http://www.xtracycle.com/
etc., etc.
!Jones said:In your opinion, what are the best rigs for carrying significant loads
by pedal power? By "load", I mean a shopping cart with a week's
supply of groceries or similar... too much for a pannier.Here are a couple that I like:
The B.O.B. trailer. http://www.bobgear.com/trailers/index.php
I own one of these and it pretty well lives up to its claims. I have
hauled up to 60 lb in it. (It's rated to 80.) I find that it tracks
very well... we use it with a tandem and it tracks better than the
bike does! It's easy to attach and drop. Downside: it's difficult to
back with a load and it's a tricky balancing act getting the load into
the trailer. Once you're loaded and pointed in the right direction,
it's great.The triciclo de carga built in Mexico. Mine is like this one:
http://seguro.coppel.com/coppel/info_muebles.php?codigo=516783 ;
however, different manufacturers have different configurations. These
are *dangerously* unstable at high speed and have ugly turning
charaisterics when pedaled. That said, they are a very good platform
when you need to carry loads beyond the BOB's capacity. If you're
straight and level and on a good surface, they can be pedaled
effectively in a low gear. If that's not so, then get off and push
it... it pushes easily and is quite stable for that operation. I
regularly carry two carts of groceries and 15 gallons of drinking
water home from the store... two miles... through the snow... uphill
both ways...Others?
Jones