Originally Posted by EBikeFL

You won't be doing 35 mph up those San Francisco hills even with the 48v 1000w hub motor. I've only once been able to hit 34 mph and that was with all the right conditions, i.e., weather, tires, and lack of cargo. There are a number of threads on this forum of members complaining of not having enough power. You don't want to fall into the same scenario.

You can always control your power via the thumb or twist throttle if you feel you're going too fast up a hill. If you plan on hauling more than just yourself up those San Francisco hills then you'll definitely need the extra power.

You want to have a good foundation on your e-bike setup. Having a strong motor and the right battery is the best way to do it. San Francisco hills will reduce your distance using a 10 Ah battery; you're better off going with a 15 Ah or 20 Ah battery. Check out Ping Batteries at http://www.pingbattery.com/servlet/StoreFront.

If you make a good investment in the e-bike components up-front it'll pay off in the long run with less breakdowns and better customer service.