In the Q&A for the product on Jenson, 3 users answered that they are using 1/8 inch chains. Though another similar question was answered by Jenson stating that both should be okay.

I'd go with the answers that were framed as having been from people that are actually using the product.

Was there no documentation included with the kit suggesting what chain to use? Jenson had no manufacturer links, nor could I find any on a simple google search.

If you figure this out, you should go to Jenson's site and add your findings to the appropriate Q&A's. Especially to the one Jenson may have answered incorrectly.

https://www.jensonusa.com/foundation...dxTe8ZdJDScHGc