1.Non-professionals, you can find a bike master assembly debugging 1.Non-professionals, you can find a bike master assembly debugging 2.As different batches,Some parts may be replaced, But we promise: Alternatives must take the same level or a higher level parts, More convenient product. 2.As different batches,Some parts may be replaced, But we promise: Alternatives must take the same level or a higher level parts, More convenient product. 3. If you have questions in installing process , Please contact our customer service to get installation video; We will be happy to serve you. 3. If you have questions in installing process , Please contact our customer service to get installation video; We will be happy to serve you. 4.All goods figure as the photo, on the different display color difference problem may come up, to describe the commodity color attribute, or consulting service to check off color problem is beyond the scope of return! 4.All goods figure as the photo, on the different display color difference problem may come up, to describe the commodity color attribute, or consulting service to check off color problem is beyond the scope of return! 5.dimensions are measured by hand,so 1-3cm error is normal. 5.dimensions are measured by hand,so 1-3cm error is normal. 1.We accept ESCROW, Visa&Master Cards, Credit Cards, Money bookers and other methods. 1.We accept ESCROW, Visa&Master Cards, Credit Cards, Money bookers and other methods. 2.All major credit cards are accepted through secure payment processor escrow. 2.All major credit cards are accepted through secure payment processor escrow. Notice: Notice: 1. If you are satisfied with our items and our service,please take a minute to leave us a positive feedback with5 stars 1. If you are satisfied with our items and our service,please take a minute to leave us a positive feedback with5 stars 2. When you have any problem,please do not hesitate to contact us to get a solution.We must try our best to helpyou. 2. When you have any problem,please do not hesitate to contact us to get a solution.We must try our best to helpyou. 1.If you are not satisfied when you receive your item, please return it within 7 days for a replacement or moneyback. Please contact us before you return it. 1.If you are not satisfied when you receive your item, please return it within 7 days for a replacement or moneyback. Please contact us before you return it. 2.Items can be returned within 7 days for quality problems or wrong items, but naturally we will check everythingcarefully from products to packaging and confirm it is in good condition.We don't cover any items for damage after use or as the result of water damage which hard for us to sell again. 2.Items can be returned within 7 days for quality problems or wrong items, but naturally we will check everythingcarefully from products to packaging and confirm it is in good condition.We don't cover any items for damage after use or as the result of water damage which hard for us to sell again.