It all depends on the defect. It is best to contact us by email and describe the problem along with some photos. If we have no doubt about the validity of the claim and when it is enough to replace a part, we will send it. However, if the main part of the frame or another key component is damaged, you will need to pack the bike and ship it to us at your own expense. After replacement or repair, we will send it back to you at our expense.