dd2's travel system has swively wheels. today in town I accidently rammed dd1's heels, well she was standing right in front of me what did she expect and she does it all the time think she'd have learnt by now that the pram goes forward and if she's in the way she will get run over, sorry I digress anyway, after running into dd1 the wheel on that side locked and it was a nightmare trying to get out of the shop door. I don't understand why anyone would want to keep their wheels locked or buy a pram with locked wheels, makes going round corners very difficult in my opinion.
Unless of course like some of you have said you go running with your three wheeler or are going over rough ground.