High Quality Materials- Weather and rust resistant aluminum alloy is lightweight, sturdy and durable and will not rust after long-term use. Use the best varnish technology to protect the product to prevent it from rusting and last as long as a new product. New Upgrade, Easy to Install- The new bicycle luggage rack seat reduces the amount of screws and only a few screws are needed. Replaced with adjustable release clips installed on the seat post, which can be installed efficiently or easily removed. Don't worry about installation at all. Anyone can install the bike rack without the help of others. Maximum Loading Support- The rear luggage rack weighing only 2.86 lbs (1.3 kg) is portable and lightweight. Manufacturer suggested 55 lb (25 kg) (when installing only via main beam on seatpost); Actually it can carry more than 110 lbs (50 kg) as you can test, but don't suggest carrying adults/people for safety reasons. Multiple Use and More Safety than Translation- Portable and sturdy support, ideally used with saddlebags, bags, backpacks, baskets, so you can carry enough for a one-day excursion daytime. Suitable for V-brake and Disc Brake bikes. It is adjustable for many types of bikes, like road bike, mountain bike, etc. This bicycle luggage rack is suitable for seat posts with a diameter of less than 32 mm. A Special Configuration- Special devices for MTB rear luggage rack: reflector, mudguard, elastic rope. The rear reflector can ensure the safety of night driving. The elastic rope can protect your load on steep roads. The mudguard can provide more protection for your bag or suitcase and keep the bike clean on rainy days or muddy roads.