1. Housing Calculator

Internally we use an Excel spread sheet that will detail how to cut your Spider 9 housing and what shaft lengths are needed for that same housing. All you need to know is the Wheel Mount Surface (WMS), Pinion Offset, and Locker Type. If you would like to use the same Excel spread sheet we use in-house, we are happy to offer this file to you free of charge. Please note Microsoft Excel is required to use these files.