Why would one want to use a car tire when the motorcycle tires are clearly engineered for bikes?
pretty much every rider who has gone darkside has reported no loss in traction/performance. So no reported disadvantage, even though every engineer and safety buff out there screams bloody murder over the idea. Now to the advantages: way cheaper and way longer mileage.
i'm not a darksider, so i cannot give first hand testimony. But i have NEVER read anything from a single darksider that regretted their choice...
i find it very interesting actually!