I wanted to thank you all again for your suggestions and information. In the end, after test driving a bunch of bicycles and thinking of different ideas for myMessage 1 of 18 , Apr 2, 2012View SourceI wanted to thank you all again for your suggestions and information.In the end, after test driving a bunch of bicycles and thinking of different ideas for my 5 year old (who is now 6!), I found my solution. I purchased a very light and zippy Trek and put a rack on the back that can hold 75 lbs (Jandd expedition rack). My son said he didn't need the bobike back rest or foot pedals. and much as i love the idea of a steel bike, the feeling of a light aluminum one is what makes my heart sing.thank you all again!On Thu, Feb 9, 2012 at 4:07 PM, Shannon Dodge <mizshan@...> wrote:I'm sure you'll find partisans of both aluminum and steel on this list - each has its virtues. Here's a quick primer:Some of its key points...you'll sniff out my bias easily enough!- Aluminum frames possess the shortest fatigue life of any material used to manufacture bicycle frames. The typical aluminum frame possesses a life expectancy of five to 10 years.[my guess is that with frequent Bobiking, you'd be looking at the shorter end of the spectrum...the frame cracks and you're done.] The fatigue life of steel is much longer, but the material requires more maintenance. To prevent rust formation steel frames must be cleaned and polished regularly and periodically coated with rust stop on the interior of the frame. [I've never heard of anyone actually doing the rust stop treatment, and when I dust it off now and then, my steel ten-speed bought used in the 80's still rides fine!].- Aluminum frames are stiff, allowing for optimal transfer of human power to forward motion, which makes an aluminum frame a great choice for sprints, time trials and criteriums. However, a stiff frame can be extremely uncomfortable on long rides. The properties that make aluminum stiff also transfer road vibrations directly to the rider. Adding a carbon seat post, carbon fork or carbon handlebar can help dampen road vibrations and increase comfort when riding an aluminum frame. Steel frames are not as stiff as aluminum frames and provide more comfort on long rides. A steel frame equipped with a carbon fork and seat post will provide a very comfortable and supple ride. [not that I have noticed a lot of carbon on folks' city bikes, but maybe I just haven't been paying attention.]- Of the two materials, aluminum is the least expensive at any given weight point. You will need to decide the cost benefit between the two materials.happy test riding!
From: Churyl <churyl@...>
To: "firstname.lastname@example.org" <email@example.com>
Sent: Thursday, February 9, 2012 2:04 PM
Subject: Re: [sfbikingfamilies] Re: Reccomendations for a new bike?
I tried out a Trek bike and loved how light and fast it was. An aluminum frame with carbon forks. Any opinion on this bike with a rack and Bobike seat attached to it as a solution? I tried a surly and it seemed heavier and slower to me.
On Feb 1, 2012, at 7:11 PM, "Jonathan" <jjfranksf@...> wrote:I bought a Kona Ute (http://www.konaworld.com/asphalt_simplicity.cfm?content=ute) second hand. I modified it by putting on some foot pedals and handlebars in back. My daughter started riding in back when she was 4 1/2 and is now 6. I will continue to use it until she can ride on streets by herself. I like it for its versatility. I can not only carry her, but also her bike! We can then bike to GG Park together, then take her bike off in back in back and bike around until she tires out.
--- In firstname.lastname@example.org, Churyl Zeviar <churyl@...> wrote:
> My partner and I have a five year old. We ride him to and from school
> - Hayes Valley to Mission, and back - during the week.
> We decided to go car-free a few months ago, and I'm thinking I'd like
> to get a bicycle that I actually like. One that is fast and light for
> me, yet strong enough to accommodate my five year old and grocery
> shopping trips.
> We got a trail-a-bike but I never use it. I bungeed snow pants onto my
> rack and he sits on there. He holds onto me and we both love it. This
> way, after I drop him, I don't have a trail-a-bike to worry about. And
> it's just a lot less equipment to haul and maneuver. I'd like to do
> something similar, but more elegantly.
> Any tips on good bike shops, types of frames to get, tires, bikes,
> seats for my little guy, anything to remember...
> Oh, also, I tend to prefer to ride upright, but I'm wondering if I
> should train myself to lean like road bikes require...? Am I just lazy
> and need to build my core muscles? Or is upright fine? Thoughts?