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Anyone have Tamiya Track and Wheels?

I was wondering if anyone could give me the sizes of the drive sprockets for the Tamiya 70100 Track and Wheel Set. I am trying to figure out some gearing if I go for it but can't find the sprocket sizes anywhere. Thanks

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teh set comes with 2 sets of sprockets,
the large one is:
3.5cm 'tooth to tooth', 3.2cm outer rim.

the small one is:
2.3cm tooth to tooth, 2.1cm outer rim, the same size as the smaller wheels you see in the pictures.

 

Thank you, Google failed me on this one! That info just doesn't seem to be listed anywhere.

lol its prolly written on the box.... in japanese :P