If the diameter of the fork is 20mm. We only send one pair of adapters as gift for each order. We sell one pair of adapter as price 4GBP. Without any harm to the car.
Clean up car and sucker. Press cylinder rod until you can't see the white part. Confirm the rear wheel position. Fixed rear wheel and pedal.If you don't know how to install, please go to see item video by computer. If it is installed on a car sunroof, please don't open the skylight. The item "Rockbros Sucker Roof-top Bicycle Rack Carrier Easy Install Roof Rack Bike Holder" is in sale since Friday, April 14, 2017. This item is in the category "Sporting Goods\Cycling\Car Racks". The seller is "inbike" and is located in Dunstable. This item can be shipped to European Union member countries.