I've been looking into getting a trunk-mounted bike rack for two bikes. However, I've heard a few people say that I actually need a 3-bike rack because there isn't really enough space on a 2-bike rack for two bikes.
Is this true? If so, why do 2-bike racks even exist? Does it just depend on the brand? 3-bike rack models are a bit more expensive than their 2-bike counterparts, and I don't plan on ever transporting 3 bikes, so I'd rather not buy a 3-bike rack if I don't have to.