PLEASE READ ALL OF THE DESCRIPTION!!! Please read all these details before purchase or asking questions, hopefully I'll cover everything here.The pictures are examples and may contain items not included, read the descriptions for details on what's included. THE WHEELS/TIRES AND ASSEMBLY SERVICE ARE ADD-ONS, THEY ARE NOT TRAILERS!!!! Add everything to your cart BEFORE checkout, example, if you want a Black on Black trailer with wheels and tires, add the Black w/Black to your cart, then add Wheels/Tires to your cart, i will cancel orders that come in with just the wheels/tires or assembly service options and no trailer kits. Onto the fun stuff! I'm sure the first question I'll get is "how strong are they", my answer is they are plastic, there's only so much you can do with that, they are scale for looks and are sturdy enough to haul some scale accessories, however, if you load it down with lead weights, well, i can hear the plastic cracking and tears falling already...besides that most crawlers wouldn't take a ton of weight to pull around anyway. All that said not to discourage you but I'd rather you think it's fragile and not buy it than to later give me a bad review because your 3 year old was able to snap it in half. **TRAILER KITYou are picking the Frame Color w/Panel Color. So in the selection if you want a Black Frame with White Panels, choose Black w/White. The Clear panels can be painted like lexan to match your truck or add graphics etc. The trailers are compatible with most any standard 7mm hex wheels frequently found on SCX24 style crawlers, I prefer the stock sx24 wheels and axial method wheels which have less offset. i won't say they will fit ANY wheel/tire combination because there are way too many variations. They will fit the Kyosho Mini-z wheels/tires with the "Y" pattern but those are smaller wheels/tires. Plastic bushings are included, but they will accept ball bearings if you wish to make it run a little smoother. you'll need 3x6x2.5mm ball bearings, quantity of 4, that's the same size as the rear ball bearings on a Kyosho Mini-z RWD racer for those familiar with them. For those who already have one of my Trailer Hitch kits (Kyosho Mini-z 4x4, scx24, FMS, Rock Hobby, Panda, etc.), i include another drop bar that's made to swivel like a universal joint to allow better off-road capabilities. **WHEELS/TIRES:As an Add-on I'm currently offering PAIRS of Axial wheels/tires AXI40000 and AXI40001. If you choose this add-on you will get a pair of wheels and a pair of tires, that's 2 wheels and 2 tires. **ASSEMBLY SERVICE:This is an add-on just for me assembling the trailer. if you also get the wheels/tires i will assemble the entire trailer and ship complete ready to go. it also covers the extra shipping due to it requiring larger packaging. **Ball Bearing Kit: NEW!These are 4 properly sized ball bearings to use in place of the round bushings. This saves time during assembly and makes it roll a lot smoother. Video for Assembly of Basic Trailer: https://youtu.be/Lj20brJshaAVideo for getting axles to turn smoother during assembly: https://youtu.be/u5LCVBoUm8E DO YOU NEED A TRAILER HITCH? Please check my shop I carry trailer hitches for SCX24, Kyosho Mini-z 4x4, Atlas 6x6, Katana, FMS, Panda, SCX24 Gladiator, and more coming soon. General NOTES: These items can warp and melt in hot sun or left in hot places like a car or attic, use caution Please see my other items for Kyosho mini-z 4x4, scx24, and Atlas trucks! Trailer Hitches, Roof Racks, Lift Kits, Hex adapters, wheel extenders, and lots more! Thanks for looking!