I am making progress on the tracked vehicles we are designing. It’s still an early prototype, but we have an image and a short video you can view…
lynxmotion.com/Category.aspx?CategoryID=94
WOAHHH!!! WAYY COOOLLLL 
can you put those on the rovers? cause that would be wicked sick
they seem like they dont weight the bot down too much either
I’m willing to bet that you can.
It seems like Jim’s designed it to conform to just about any design that has motors which the sprocket will fit.
I’m also willing to bet that he’ll be coming out with a sprocket that fits servo splines, too.
The tracks require either idler wheels or some other support to keep the vehicle running smooth. I doubt they could bolt onto a 4WD1, 2 or 3 without significant whump whump whump action when in motion. But we will have several chassis designs like the 4WD bots. The robot in the image weighs only 3.5lbs with batteries. The tracks (21 links) are only 8 oz for the set! Yet they can support so much weight.
Well sign me up,
Jim, right up front, I will be ordering 10 sets of drive sprockets and 84 inches (4 sets of 2 inch) of track - day one of readiness. I hope your initial stock isnt gonna be wiped so fast people wont be able to get the amounts they desire.
Excellent
Idlers ready?
Thanks for the very excellent video.
Chris
Thats looking good Jim.
Time to replace the old desktop Rover.
Looking like next week. Still waiting for the bulk of the tracks to arive. We have 900 feet coming so don’t worry about stock. 
Idlers can be made from any round metal or plastic tubing, wheels, or even the sprockets. Track systems can be complex just because of the quantity of parts involved. At least the really hard part has been simplified as much as possible.
Sweet!!! This is what I’ve been waiting for. From what I can see in these pictures, does this use 4 motors?
I like this part of Step 1
I am also interested to see how the sprockets and idlers are intended to be assembled, and what do you mean in the product description by a dual sprocket config? How or on what would that be applied? I’m not seeing it in my head yet is all. 
I believe what he meant by dual sprocket config is to take two sprockets and mount them back to back cup side out like this: ] then put the screws through both sprockets into a single hub.
ok, but to what end? Do you need to do something like that to keep the tracks centered on the sprockets or make them more stable on uneven surfaces? I am probably jumping the gun with these types of questions at this point. 
Yes it is a 4WD tracked vehicle so to speak.
I don’t know, good question. 
I think that with wider tracks you need the dual sprockets. Perhaps Jim can shed some light on this…
JIM!.... Put down the screw drivers... We have a question.Yes, that is exactly correct. The text needs to be updated. I am also trying to get another version of this in a 1.1" wide format that would only require one sprocket. It’s not looking good at this point, but that is why it was worded like that. For the 2" wide tracks the dual sprocket design is what is required.
Ok, I can tell I need to go into more detail here. The prototype vehicle, (works very well so far) does not use idler wheels at all. It uses a dual idler rail for lack of a better term. I do plan to test idler wheels before final production, but if there isn’t a significant improvement over the rail system I may not bother. It’s very common to use dissimilar materials for bushings and sliding assemblies. The Lexan material used in the chassis and the Polypropylene used for the tracks performs very well, with very little friction. After many hours of use the Lexan’s laser cut edge has a smooth finish, and the tracks show no wear at all. Below is an image of the sprockets in the back to back configuration. You can also see how the long teeth will not allow the tracks to jump off. 
The image below shows how the idler rails line up with the tracks.
If idlers were to be implemented I am thinking about nylon tubing with an ID of 0.28+ that will slip over the hex standoffs. This would provide adequate support for the vehicle.
Now where’s my screw driver?
Beth took it.
And she won’t give it back until you mow that lawn, mister!
those last 2 pics help a lot (At least for me). I need to look at a model of mine and may be able to help with the idler wheel or pop off some ideas that you have tried.
I like the hollow Nylon tubes over the hex bolts idea. Very simple and effective. I say go that rout, at least with the rover platform in the picture above.
I have to agree.
Having the necessity of a custom-cut panel of lexan as an idler takes away from the ability to use these treads in just about any design.
If you have a simpler setup, like the tubes around the hex’s, it keeps it dynamic, which is what makes your treads unique.