I have been searching for an affordable bike rack to go in my truck bed which doesn't require wheel removal. Didn't find what a needed so modified a design from my LBS bike rack and now I can fit 4 mountain bikes in my truck bed without wheel removal. The front rack is bolted to the truck bed and has adjustable forks to accomodate different length bikes, the back rack fits into slots in the truck bed liner and expands by twisting, like a shower curtain rod. To load the bikes, slide the tires into the ford at the front of the truck bed, when all bikes are in, slide the back rack forks onto the wheels and into the bed slots, give it a few twists and all is secure!!! work's awesome!!!
Check out May 5's entry for pictures: