There are many types of racks, roof, hitch and strap ons. What do you use and how do you get yout bike to the trail head or to where you might be going for your group ride? All have their pluses and minuses. With vehicles getting bigger and more utilitarian, are you still putting them on trays on roof? Can you still reach the roof? If you have a truck/wagon/SUV are you putting your bike in the back? Trailer hitch mounts have many more choices now a days too. Strap on racks are still around but with some composite tailgates & trunks these less expensive alternatives are being less and less of an option.