Looking to build that perfect Spider 9 axle? We’ve just made some updates to our Spider 9 calculator that will ensure you get the job done, right. The image above is a screen shot from the calculator itself, and hopefully from the image you can tell it’s pretty easy to use. Simply enter in the “Given”, namely the wheel mount surface (WMS), A, and the locker type. With just those three pieces, we fully dimension out the housing, tube cut lengths (Ta & Tb), shaft lengths, and pinion offset for all of our different hub configurations (Ultimate Unit Bearing, 1 Ton Unit Bearing, or Pro Series Hub).

The calculator was created in Excel, so you will need Excel or a program that can work with Excel files (like Mac’s Pages). Head over to our SUPPORT page where the both front and rear calculators can be downloaded.

That’s it for today. Have a great holiday weekend and a quick reminder we’ll be closed this Monday for Labor Day.