I am a newbie to the Wallke X3-Pro W-PAS, but here are some answers from my experience with being a new owner:
1) Both me and my brother's bike has the same issue, unable to change anything in the advance settings. We haven't gotten around to e-mailing the company about it.
2) We did have to do some brake adjustments. Also, if you don't know or want to take the time to watch YouTube vids on how to tweak parts on your new bike, I'd take it in to a bike shop to get a little tune up to make sure everything is nice and tight to be on the safe side. I was lucky and found one with a 24 hr turn around time versus 2 weeks everywhere else.
3) We have already washed our bikes with water after taking it out in the dirt and to the beach several times. It works just fine, but we make sure to lubricate the chain and grease the various parts. We also treated it with an anti-rust protectant.
4) I have read the 28 inch setting is closer to the 4 inch fat tire that we have even though it is 26 in. You can compare with another gps mileage reader. It would be nice to adjust the advanced settings like some I have seen on another thread, perhaps an e-mail to the company can shed light on this.
Thanks for the reply. It really helps. I talked to customer service and they said that the setting lockout is by design, they don't want users changing the settings without consulting them first. The settings can be accessed by holding the "+" and "-" buttons while powering it on, you'll see an "ok" in the bottom right corner indicating it's ready to change the settings. Then save the new settings as normal.