Are your garage door and the overpasses too low, and your truck too tall?  You might want a shorter antenna, but you still want maximum performance.  Right?  This should help. 

The Wilson Short Load Adapter is only 3', and replaces the 62" whip for the Wilson 1000 & 5000 and the 49" whip for the Trucker 2000 & 5000.

• Bandwidth is still wide enough for most uses at 1-1.2 MHz, with 500 Watts of power
• Adapts to the Wilson 500 and all models of previously mentioned models
• Easy to Tune and Install
• Always cut the top of a whip, not the bottom