UNIVERSAL RACK :This suction cup bike rack fits most vehicles—including sedans, coupes, hatchbacks, SUVs, and vans—and works best with flat roof surfaces; it is not suitable for vehicles with excessively smooth roofs (which reduce suction adhesion) or highly sloped side roof areas (which affect stability), making it perfect for safely transporting bikes during road trips or camping. STURDY AND SECURE : The aluminum alloy body is sturdy enough to hold your bike. Rubber sucker protect your car paint from scratches. Comes with the velcro strap for fixing the crank to avoid it scratch your vehicle. TOOl-FREE INSTALLATION AND REDUCED NOISE:The suction cup bike rack requires no complex tools for installation.Follow the included instructions for installation. Meanwhile, its compact and slender shape effectively controls wind resistance, greatly reducing noise during driving and allowing you to hit the road with peace of mind. COMPATIBILITY : Fit for mountain bikes, road bikes,trail bike or any bike with a quick release front wheel. Two radians on the rear wheel sucker perfectly adapted to mountain and road bikes. This bike carrier for car make travelling with your bikes come true. Any using problem please let us know, we will help you to figure out.