Starter kit gear ratio

I was wondering if anyone could tell me the starter kit gear ratio and in needed we use neos

Kit of Parts drive base gearboxes?
I haven’t used a KOP drivebase in a while, but I believe this is what they give out: https://www.andymark.com/products/am14u5-6-wheel-drop-center-robot-drive-base-first-kit-of-parts-chassis?via=Z2lkOi8vYW5keW1hcmsvV29ya2FyZWE6OkNhdGFsb2c6OkNhdGVnb3J5LzVhZjhkN2Y1YmM2ZjZkNWUzNmYyMzRkOA

If that is correct, the ratio is 8.45:1