Section 12-14 Road Wheels & Drive SprocketsOther than the usual sprue attachments, the wheels are crisply-moulded and a big improvement over the Tamiya and even better than the Modelkasten versions, with highly-defined bolts, etc. Be mindful of the order they're assembled in, as the interlocking series goes together in a certain way. I have not mounted them in my build, as I plan to paint them and then add them at the last moment.

There
is a problem with the drive sprocket housing, as well as with the drive sprockets themselves. First to the housing: there is a pin shown in the instructions (with a hole in the chassis for the pin to align with the drive shaft from the transmission), but the pin was missing on mine:

It’s easily remedied with some stretched sprue (or better yet: some white styrene rounds from Plastrut). The review by Perth Military Modeling identified a mis-alignment here with the transmission and the gearbox pin, but it was not a problem for me.
The drive sprockets are four sections that go together in a tricky alignment. Be sure to have the four pins on B16 match up with the four holes on B15. There is also an issue with the detailing on the rollers of the sprocket: it's
only on the side facing inward. Not sure what Trumpeter was thinking, but there you have it. If you plan on mucking up the tracks with snow or mud, this won’t be an issue. But if you’re a stickler for detail or plan on having them show through, I would suggest adding a tiny piece of circular PE if you have it or otherwise scoring the details. I have referenced a Toadman’s photo (his Sd.Kfz. 7 photo CD is coming out soon, and will be a “must have” for any builder of this vehicle) to show what the details SHOULD look like:
http://www.toadmanstankpictures.com/sdkfz7_90.jpgTiresAs I pointed out in my in-box review, the vinyl tires provided are have an incorrect (possibly post-war?) tread pattern, likely cribbed from the vehicle in the Toadman's photos (a restored Sd.Kfz. 7 at the Military Vehicle Technology Foundation in Portola, CA). Again, unless you plan on heaping up the mud or snow, an AM correction is in order. I had long planned to assemble this model for an Eastern front Winter 88mm FLAK 36 diorama, so I had R&J Enterprises snow tires in-house before the kit arrived. Joy at R&J is a real gem to deal with, and they have regular tread and sand treads as well.

R&J’s website is
http://www.rjproducts.com/" TARGET="_blank"> http://www.rjproducts.com/Section 15: TracksThe tracks are moulded in a medium brown soft plastic that reminds me of the Modelkasten tracks.

I opted for Friulmodel tracks in my Tamiya Sd.Kfz. 7 build (
https://armorama.kitmaker.net/forums/113325&page=1" TARGET="_blank"> https://armorama.kitmaker.net/forums/113325&page=1) because it's a Barbarossa vehicle at the beginning of the invasion. The Modelkasten tracks won’t fit the Friul drive sprocket I used on that build. I chose the Friul sprocket in addition to the tracks because it has superior detailing. I discovered after working with it and the Modelkasten sprocket included with the tracks that the Friul has the correct number of teeth (14), while the Modelkasten does not!
In this case, the Trumpeter drive sprocket has the correct number of teeth and detailing superior to the Friul sprockets. The PE ring the circles the wheel nuts in the center of the drive sprocket is a challenge to assemble; as with any circular PE, there is the risk of bending it, so BE CAREFUL! I used the Mission Micro Chisel as a guide, since it's the same diameter, and solder to hold it together. Unlike with some of the other PE in the kit, you don't have a styrene alternate part here, so if you're totally intimidated by the thought of bending the part into a circle, I would recommend the Friul drive sprockets, which have good detailing and this part already attached.
The tracks go together well, better if you have a jig. The track pads are in two pieces and require some trimming to remove sprue attachment points, and you should be sparing on the glue if you want the tracks to be moveable.