"The lightest bike you can buy is 9.o49499105 lbs. This bike is not sold complete, you must buy all separate parts and build it from scratch ,
Forks: Odyssey s2 director forks.
Frame: Lopez-it.
Stem: Ax lightness Zeus.
Handle bars: Animal piff 2.0 bars.
Crank SET: Hiten burg.
Peadles: Light action.
Seat: Tioga carbon spider saddle.
Seat post: Alienation midget stick pivitol post.
Sprocket: Crupi chain ring.
Rims: Odyssey 7K-A.
Hub back: Odyssey race cassett hub.
Hub front: Primo N4.
Spokes: Odyssey.
Chain: Khe hallow half link."
OK-lets check the math on this.
Frame, 3.5 pounds
fork 1.5 pounds
bars 1.25 pounds
cranks+bb/gear 2 pounds
rims 2.2 pounds for the pair
that's over 10 pounds already!
tioga carbon saddle .5 pounds
chain over.5 pounds
tires s spec 1.5 pound for the pair
rear hub 1.25 pound
front hub .5 pounds
spokes 1 pound
seat post+clamp .25 pound
pedals+headset 1 pound
stem .5 pound
about 18.5 without brakes or grips
Of course I rounded to the nearest quarter pound but I think you'll find this to be pretty close. assuming you are using 16 oz or 454 grams= a pound
spokes weigh 1/4 oz or 7 grams each X 72spokes unless you spec Titanium which you should if you are going for ultimate light weight.
check out lightbikes.com
or weightweenies.com
rims are around 17 oz each-
The worlds lightest bicycle is 6 pounds. It can be seen at fairwheelbikes.com website and is estimated to cost $45,000.
I built a BMX micro for a 4 year old that weighs 6.5 pounds. It can be read about in May 2013 PULL magazine.
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Some exotic bmx minis and micros have been built that weigh less than 8 pounds- these would be for four to six year olds who race BMX. Typical minis will weigh from 12.5 to 15 pounds ranging in price from $2000 custom built to $300 stock model.
Damon Sprague showed a custom built micro mini at the 2012 USA BMX Grand Nationals that weighed 7.59 pounds! Further work was done off till an astounding 6.5 pound weight was acheived. It can be read about in May 2013 PULL Magazine article by George Vick.
it depends on what sort of rider you are going to be,
if your going to be a skatepark rider (tricks ect,)
go to your nearest bike store and look at different ones in your price range.
an eastern boss bike 2010. 22.3 lbs. i think, chech it out at www.danscomp.com
click bike, then go to eastern, should be on 1st page
The lightest bmx in the world is the
titanium grim reaper made by eastern. The frame weighs in at a amazing 2 pounds and the complete bike under 20.