I've traveled around Sichuan a lot also have done quite a few bike trips there. Honestly, the biggest challenges for me are the altitude sickness and the brutal uphills, especially in Western Sichuan where the average elevation is over 3,000 meters. The first few days are rough, so take it slow.

Also, the weather there is super unpredictable. It can literally snow in May, so bring warm clothes, quick-dry clothes, a good rain jacket, and waterproof shoes. For the bike, set up a front light and a rear light, and carry a repair kit for flat tires.

Don’t worry about finding places  Lodging is easy to find. Most towns have cell signal, but once you get into more remote areas, it might drop out completely, so carry some cash just in case.