Specify a New or Retrofit Kit
If the axle was prepped at factory for P.S.I. Tire Inflation System, use prepped axle kit. 
Please provide the following information:
Axle Manufacturer
Spindle Series (“N” - Tapered, Or “P” - Straight)
Dual Tires or Single Tire (SS)
Wheel Size
Quantity of Axles (Single, Tandem, Tridem, Etc.)
Hub Material - Ductile Iron or Aluminum
Appropriate Style of Hubcap
Desired Cold Tire Pressure Setting
Hubcap Type or Wheel End Lubrication Type
NOTE: Hubcaps are not included in kits and must be ordered separately.  When ordering hubcaps, please provide appropriate style of hubcap and wheel end lubrication type.
NOTE: P.S.I. recommends a maximum of 4 axles per system. For configurations w/ more than four axles, contact customer support.