Variable head angle bike
visit http://www.variangle.com for a full rundown
and here is a review by Singletrack world:
but briefly …..
it allows the rider to alter the geometry on the move.
by having a rotational headstock with its centre of rotation in front of the bike and directly over the front axle, the effect is 3 fold
as you decrease (slacken) the head angle :
1 – you extend the wheelbase – which gives increased stability downhill
2 – you extend the fork in relation to the frame – maintaining the same frame height and the same attitude to the ground.
3 – you shift centre of gravity rearwards
here are three scenarios:
DOWNHILL RIDING 55-60 degrees
a slack angle 55-60 is best for downhill: a longer wheelbase gives more stability as it keeps your centre of gravity more rearward
with the weight shift rearwards and the bikes height remaining roughly the same it prevents you feeling you are about to go over the bars.
FLAT TRAILS 60-65 degrees
general riding relatively flat tracks, enduro and jumping, is best done with around 60-65 degree head angle:
CLIMBING – 65-70 degrees
the natural inclination when climbing is to get out of the saddle but this loses efficiency if you do : for climbing use a steeper angle 65-70 degrees and you wont need to.
it gives you a shorter wheelbase and makes you go uphill faster – and around 2 gears easier. A shorter wheelbase transfers centre of gravity forward saving having to get out of the saddle.
a European Union EUIPO registered design and patent pending
framebuilders who wish to use this design simply contact firstname.lastname@example.org