Need 3 Replacement Tires for InStep Duosport Bike Trailer

I would try local bike store or the store that carries that brand of stroller.

i do not know where the directions are but there are only 3 ways they connect and all are really obvious first which looks like your one gets done in with the wheel nuts it has a round flat disk like end with a hole in it. Second is the seat poll attachment but that has a arch as to not hit the tires, and third goes on the bottom arms of the back of the bike and fasten on with small screw in clips.
hope this helps you out.

have you tried going to the instep web site and use the contact us usually they will ask for the info off the sticker and manufactur date and you can usually get replacement parts

http://www.instep.net/customerservice.html

Hi, jogging stroler replacement parts can be found at amazon. Take a look here: Allen Sports Bike Trailers Joggers. I hope this helped. Cheers

it's kinda tricky to put the bracket on, but it should have come with a weird bracket that kinda looks like a brake caliper, the bracket goes around the back of your frame, as opposed to attaching to the wheel pin like the inStep trailers...if you don't have the bracket, i dont know what you can do

Instep does have replacement parts for some of their strollers. For $25 I was able to purchase a new seating pad.

I should go to he Pram Shop where you bought it from, if it has closed down go to a Mothercare Shop or similar Pram Shop. They will be able to get you the information you need.

any 6" front wheel will work, available at most bike shops

Sure, take a look here Amazon com instep quick replacement
enjoy

inSTEP