Tonghsheng TSDZ2 TSDZ2B Chainring 34T 42T 52T Chain Ring 34 52 Chainwheel Teeth Tonghsheng TSDZ2 TSDZ2B Chainring 34T 42T 52T Chain Ring 34 52 Chainwheel Teeth It can fit the mid motor directly, do not need the adapter. 34T Chainring 42T Chainring 52T Chainring Warranty: 30 days (basedonthepurchasedata):We will send a new one to replace for free if quality problem. Payment: The payment isn't included the remote fee. There will have extra cost if your address is belong to remote areas. Return & Refund: After receiving the item, buyer should start a return within7 days. Return postage will be paid bybuyer. The return items must be in original conditions never used. Buyer can not return to sender address, we will provide local return address to buyer. Feedback: Your satisfaction and positive feedback is very important for us, it will be very kind of you to leave us 5 stars feedback, if you have any problems, don't hesitate to contact us, we will do our best to serve with you.