mxp wrote:Its the hilly terrain (to the park area) and distance which makes the biking not so much fun.
Plus, I think I could convince the wife to spend more time riding a bicycle, if she knew she could make it back home (on electric power) when fatigue sets in.
$1000 is still a huge expense which we would need to think through, especially how often the bike will get utilized....
Thanks. Mission Peak
? I often hike up to the top on T-giving, XMAS, new year's and/or my birthday, if I'm not out of town, otherwise busy or just lazy. I'm usually the token Caucasian, along with several hundred people of south or east Asian descent making the same hike.
As to whether you'll have enough power to climb, absolutely:
https://en.wikipedia.org/wiki/Human_pow ... able_power
During a bicycle race, a well trained cyclist can produce / sustain close to 400 watts of mechanical power over an hour and in very short bursts over double that: 1000 to 1100 watts (modern racing cycles have greater than 95% mechanical efficiency). An adult of good fitness is more likely to average between 50 and 150 watts for an hour of vigorous exercise.
IIRR, Bryan Allen, who pedaled Paul MacCready's Gossamer Albatross across the English Channel, had to sustain something like 0.7 hp (522W) for almost 2.5 hours, but he was a serious amateur bike racer.
I'm assuming that neither you or your wife are world class racing cyclists, so it's unlikely that you can produce anywhere near 350 watts. BTW, before you make the decision, you might want to go over to S.F. some weekend and rent e-bikes. There are numerous places to choose from, and that will give you the opportunity to try them out on seriously hilly terrain. Just google 'San Francisco electric bike rentals'. Even if you can't try the same model you can probably find one with similar features to get some idea of what you like and dislike, and will save you some cash if you decide against it. Unfortunately, the only time I've ridden e-bikes, although it was in S.F., we were restricted to flat ground so I couldn't try them out on the hills - I would have loved to have tried either the Hyde or Mason street cable car routes to see if I could do them sitting. My reviews of those bikes are here: http://www.mynissanleaf.com/viewtopic.php?f=12&t=10256&start=150#p472116
I'd recommend renting a couple of different bikes with noticeably different specs to swap between you or even just take several for a test ride (if the store allows) before renting one for the day. I was quite surprised at how very different each of the bikes I rode above felt, even in the benign conditions.