this is off of Wikipedia which is a little more credible than urbandictionary
Other: In addition to being known in the Westcoast rap community, they are also one of the few companies to make a 24 karat gold wheel. Dayton wire wheels are regarded as the wheel of choice for lowrider cars, with the 13 inch and 14 inch reversed spoke wheels being the most popular. Dayton rims have also been referred to as "D's" by many rappers.
50 cent mentions he uses Dayton rims in his song "Get In My Car".
The Game mentions Daytons in the song "Higher" from the album "The Documentary".
In Afroman's single "Crazy Rap" he mentions Dayton rims.