In article <
[email protected]>,
Bill <
[email protected]> wrote:
> Ryan Cousineau wrote:
> > If you really loved your child, you'd build up a custom cyclocross bike:
> >
> > http://flickr.com/photos/ttcopley/456758466/
> >
> > More photos of the project:
> >
> > http://flickr.com/photos/ttcopley/sets/72157594551105230/
> >
> > What's going on here is that the new owner of this bike was a
> > cycling-mad 7-year-old who sincerely wanted a road bike. So we built one
> > on a 20"-wheeled frame.
> >
> > The project turned out so well (both technically and in terms of how
> > much the rider liked it) that I'm convinced a flat-bar version of this
> > bike would be the most humane type of kids bicycle. Indeed, the
> > 7-year-old now has the fastest bike on the block (the other trick was
> > equipping the bike with some slick-ish 20" BMX tires; not as quick as
> > going for full-on 20" racing tires (available thanks to recumbent riders
> > and fast folding bikes), but far cheaper and more appropriate).
> >
> > Sora shifters have adjustable reach,
> >
> If you are mechanically adept, then that would be a great project.
> The only big problem I have had is teaching the kids
> to properly secure their bikes against theft rather than just dropping
> them on the front lawn.
> Of course if you made them a bike to brag about they would probably take
> pains to make sure it was secure.
This project was entirely rider-driven, as it should be. Indeed, the
proud owner has an older brother who is essentially indifferent to
cycling, and happily (but casually) rides his stock kid-sized MTB around
the neighbourhood.
> I like the project but finding 20" slicks had to be a real search.
> Cheers on the effort and results.
> Bill Baka
20" semi-slicks were dead-easy to find: you just look for BMX "flatland"
tires, the stuff the freestyle riders use for riding skate parks and
urban terrain.
Here's Kenda's selection:
http://www.kendausa.com/bicycle/street.html
Some of these tires are more slick than others, and some are sorta
inverted-tread, but all are more free-running and grippier than
knobbies, and more would be overkill for most kids.
The next step up are the truly fast and skinny 20" tires, readily
available by mail-order, but as it happens the recumbent-specialty shop
in Vancouver does stock them (prices start at $30 or so).
The set that ended up on this bike were some off-brand that was at a
nearby bike shop (I am privileged enough to have three within walking
distance of my house), C$8 each. Any shop with a pretense of serving
BMXers is likely to stock tires of this type, though perhaps not as
cheaply.
The brakes took some work, and getting a 20" fork with canti posts and
the correct steer tube was not trivial. I ended up at one point staring
at two 20" forks I already owned, and realizing that neither would
actually work. Aside from the common 1" and 1-1/8" fork sizes, BMX forks
sometimes come with a 21.1 steer tube diameter, which for this project
was a bit of a dead end. All came to the good when Dad found a 1"
threaded fork with canti posts at Our Community Bikes (used parts and
bike-fixing co-op).
--
Ryan Cousineau
[email protected] http://www.wiredcola.com/
"I don't want kids who are thinking about going into mathematics
to think that they have to take drugs to succeed." -Paul Erdos