Due to FedEx's failure to deliver the bike as required during transportation, parts of the wear and scratch may cause by the parts crashing together, although we have packed all the parts to prevent these situations as much as we can. Please send us the related pictures or videos which would help us check the condition and solve the problems.

All bikes have both throttle and pedal-assist. You can choose to use either of them when you riding.

Yes! The Aostirmotor seat uses an industry-standard seat attachment bracket and an industry-standard 27.2 mm seat post (or seat stem) diameter. You can also replace the seat-post by using any standard seat-post with a 27.2 mm diameter and can optionally choose to re-use the seat that came with your Aostirmotor on the new post or use a different seat. Customize and personalize away!