Bay City Bike Rentals and Tours at 1669 Haight Street, San Francisco, California.

Nice downhill ride into Golden Gate Park only to discover bike wouldn't climb slightest hill due to worn-to-nubs derailer teeth. Pushed it back the mile to rental location and lady insisted on full charge, blaming me for not calling number on bike and waiting for someone to come to replace it! Her reply was terse and polished, she'd clearly used it before. I'd avoid this org like the plague!

Great experience and the one rental shop I could find near Golden Gate park that had electric bikes (power assist). I wanted to explore the park leisurely but travel at a decently quick rate to get to the different main areas, which meant I didn't want to walk around the entire park on foot, but I also didn't want to kill myself biking up hills - power assist is perfect! (Later I found out the park also has free shuttles every 15min, so I'll definitely look more into that option the next time).

The woman at the front was very nice, I booked online to make sure they wouldn't run out of power assist bikes, and everything went smoothly for me.

The reason for the 1-star deduction is simply due to their closing time, which is solely a note towards management: It would have been much nicer if hours could be extended to 8:30pm, especially for non-winter hours. Or even better, have an after-hours drop off. There was so much to see in the park but we had to constantly keep track of the time to make sure we returned the bikes before closing. The woman said there is another location on Fisherman's Wharf that closed at 8pm, but given how far away they are it would take us nearly the whole hour just to get over there (although I suspect that return location is primarily for folks taking the ferry back from Sausalito.) The only slight annoyance I had with the woman at the store regarding closing time was that she told us the closing time was 7pm (which was also written on the board behind her), but we found out later it was actually 7:30pm and they just want all bikes back by 7pm. Because we would have never considered returning a bike at the exact time of closing, we had planned to be back by 6:30pm. But I understand many other people aren't as considerate, and I could have also mentioned to her that I was planning on being back by 6:30 and then hopefully she would have clarified, so I'll take a bit of that blame too.