cannibalcabbage

My comment on the reactionary forces are regarding a comparison between the cornering around the cones and the sliding on the snow where the forces are not equal between the two. The reactionary forces I have spoken about refer to the resolution of forces (Pythagoras) which act in line between CofG and contact patch. The reactionary torque is due to any gyroscopic moments induced by turning the bars or leaning the bike. It effects the torque at the steering wheel. You can obtain equilibrium in the corner by appliying a counter torque to the bars or countersteering. I am not disagreeing on that. you cannot ride a bike a high speed without doing it, anybody who disagrees just hasn't realised they are doing it yet.

Fair betsie, I perhaps could of found a bermless example. The snow riding situation changes things alot as he's sliding down the hill and it can be seen that he doesn't have full traction. The reactionary forces at the contact patch are reduced due to any sliding meaning that the physics kinda goes out of the window especially as he is not on a flat surface. When your sliding like that the tyre will be constantly in between slipping and gripping so everything changes. Riding the way this video suggests will not improve the traction at the contact patch it will only create a bending moment around the hub and the contact patch. Wheels are laced in tension in the upright position for a reason.

If your riding style is dialled into the method presented here that's fine. But, the resulting force has to be countered somewhere. Namely down through your outside leg instead of through the steering head axis, energy best spent pushing your bike back up the hill. Putting your leg or elbow out or whatever is simply a placebo as its does not have a large roll to play in altering your centre of mass. One of the main things is the angle of your arm as this will give you more control over countering the torque at the bars and a good presence over the front of the bike. All im saying is, don't be scared of the lean, its natural! see for yourself (this ain't me but its a f**ckin good lean) http://www.pinkbike.com/photo/6136465/ Enjoy the ridin'!!

Hello The main problem with this concept is the idea of shifting your weight over the contact patch line between both tyres. This I believe is false under many circumstances. Initially the idea may seem correct however it is only applicable at LOW speeds. During cornering the bike and rider (combined masses) create an overall mass which in turn has its own dynamic centre (centre mass/centre of gravity). This has two effects; 1. it creates a vertical force acting downwards (mass x gravity) 2. it creates a horizontal force (centrifugal/centripetal, ((mass x velocity^2)/corner radius). The result is a force acting diagonally through the tyre contact patch. From this we can see that the smaller the corner radius the lower the speed (which is clear to anyone). The issue is that at higher speeds you must take into consideration the combined inertial effects of both wheels and its effect on gyroscopics. At higher speeds the bike will always want to pick itself up as a change in the direction of the front wheel to corner creates a torque. It is this torque which picks up the bike, and it is this which you must counter in order to maintain maximum speed in a corner. This torque is created with a combination of you counter-steering and leaning over towards the inside of the corner. If you don't lean and shift your weight away from the tyre contact patch then there will not be enough torque created to counter the bike. Hence you highside and spend the next 5 minutes picking bits of hillside out of your helmets' mouthpiece :P