【High Quality Materials】- Weatherproof 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 seat wears bicycle luggage reduces the amount of screws and only a few screws are needed. Replaced by adjustable release clips installed on the seatpost, which can be effectively installed or easily removed. Don't worry about the installation at all. Anyone can install the bike rack without the help of others. 【Maximum Loading Support】- The rear rack of only 2.86 lbs (1.3 kg) is portable and lightweight. Manufacturer suggested 55 lbs (25 kg) (when installing only via main beam on seat post); In fact, it can carry more than 110 lbs (50 kg) as you can test, but don't suggest to carry adults/people for safety. 【Multiple Use and More Safety 【Translation】- Portable and sturdy carrier,