Bigfoot™ Support Drives Hard Anodized Aluminum  
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These drives are to be used with the ADA Bigfoot™ 3rd bearing support. They can also be used as a replacement for the stock Bigfoot™ drive, but doing so requires the use of a Sport™ drive spindle bolt (6mm x 45mm).

These spindles have a diamond knurl pattern

Drives are NOT warranteed against wear or improper installation
Larger drive spindle = more top speed and less acceleration
Stock Bigfoot™ spindle size is .625" diameter
Too large of a spindle may result in less top speed on less modified engines
Rider weight also affects spindle size and top speed
Spindle size is measured in inches, ex. .625" = 5/8 inch