7.4.11: mobi`dahon
intro
. the dahon
is a folding bike
with 20'' wheels
that was incorporated into the design of the mobi trike
. the drive includes the gears, derailers,
pedals, toe`clips
and any modifications needed after adding mountain bike gears to
the front .
. the brakes include both original brakes
. the shell is what protects the driver from
the weather,
and includes the fender, and mechanisms
that guard
against animal attacks .
. the frame was modified by removing the pin
from the folding joint,
and then perching both front.forks onto the back wheel alongside
the back.forks .
. the steering was converted
to a culti (shown below), where the handlebars are fixed to the rear of
the trike,
while the driver`seat is perched on the
handlebars to turn the front
wheel by waist rotation
dahon`seat
. the seat on mobi`dahon
is arranged like it was on the original dahon,
but it's reclined a bit more to match the angle found on
prof.Tauber`s safety bike (shown left)
. to accommodate the seat`post`s added stress from carrying weight at
that angle,
it is affectively shortened by resting on the steering stem (shown
below) .
7.2.15: seat`back
. the seat`back folding down
could hold the steering wheel in the straight-ahead position .
todo:
. how to add a seat`back to the current config' .
7.1.7: dahon`stem:
. connects to u bolt:
u-bolt with seat post needs shim to fit u-bolt
and to strengthen seatpost .
7.3.5:
mis"seat`bolting
. when moving the seat to steer this long bolt under the seat snags the
cables?
that bolt should be going the opposite direction:
it's holding the seat`springs to the seat`carriage,
and the bolts that went there have been lost
(this is seat that dahon came with, but I had replaced it with a
10-speed seat
until I started getting into
semi-recumbent designs)
7.3.6: redo
. i's a fairly long bolt, so it might interfere with the spring action:
needs to be shortened or replaced .
7.3.6: redo nixed
. the driver`s butt hits the gym`handlebar before the springs bottom
out
into that bolt .
01.4.17:
aq.gear/portable bike
sea google( portable or folding bike)
best aviation cons.aug2000
dahon --presto is ligtest 20#/$500
20#12x20x30 sram 3spd
piccolo/$300
26.4#12x20x30 --steel tubing
buy at /betterbicycleco.com
8/2362953
consumer reports`
most popular n best buy:
boardwalk6
boardwalk6/$260
26#12x22x33
consdigest may/jun 99 ` bestbuy : dahon` 7-speed
v38 n3 p73-76
best buy
$300 dahon
20'' 7spd 12x22x32 #31
$500 montague backcountry
12x38x30 # 29 folding mountain bike also by mongoose
$995 burley birdy 7
15x30x23 #22
chk camping rv sto or do online
board walk7 is bestsell
bromptonbike -- t5 faster but heavier
strida --chain is a slippy belt
solid polyurethane
tires
7.5.16:
. perhaps polyurethanes could damage tires by fitting too loosely,
and not spreading the impacts evenly
. try filling a spare tube with polyurethane insulation foam (eg,
handifoam, ... construction vapor leak sealing in a spray can ),
and then under that tube, have a pneumatic tube;
so, then flats are reduced, and the grip is firm .
No-Mor Flats
--3000 miles per year, No-Mor Flats is great for me
they increase the weight of the bicycle by less than two pounds
. When
they are first installed, there will be slippery water between the tube
and the tire, which may cause the tube to slip around, making riding
rather hard
. Once it has dried out (overnight, if you do it in the
evening) riding is the same as before
. There is more inertia, you will
not coast as fast, but pedaling is no harder.
flat-free tires
These products are semi-solid rubber, with no air, so they can't go flat
. You can get either an air-free tire,
which replaces the whole tube & tire (e.g. Greentyre),
or an air-free tube,
which fits inside your existing tire (e.g., No-Mor Flats, Toobz
http://www.toobz.co.uk/ )
. These are an as-yet unproven technology,
and cycling equipment master Sheldon Brown http://www.sheldonbrown.com/
thinks they damage wheels
. (We don't know whether that's true, but we're loathe to disagree with
the revered S. Brown)
Below are some reviews of these products.
7.3.19: tire slimed
. tire had the wrong type of slime (tubless vs bike slime)
difficult recycling slime from front tire meant for rimless? just mop
and toss;
refill tire with bike slime .
