I am receiving a very bad reception.This is a phenomenon in which the product using the 1520-R29RAA-001 hub is passed without a pre-body ratchet.This is a symptom that does not catch ratchet when pedaling.It is no longer possible to process inventory in GKR.Can you send 30ea by air for 152A-11SP12-01 parts?It is a GTM bike, but the hub is GCK production, so we request it.Would you please take care of this case from GKR, and arrange some replacements to GKR directly!If you need the defect hub return please let Donald know also!89, SEONGSUIL-RO,SEONGDONG-GU, SEOUL,04790 KOREA