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[b][u]Leaning in Turns[/u][/b]
To turn a cycle at speed, you don’t turn the bars but lean the cycle inward towards the direction of the turn.
The faster you are going, and the sharper the turn, the more you lean. You have no choice in this matter.
For a given speed and turn radius, the centre of gravity of the rider must be moved sideways or the cycle won't balance. The only thing you have control over is whether you lean the cycle more than, less than, or the same as your body.
[b]Lean the cycle - keep your upper body more upright[/b]
This approach is popular with beginners who are scared to lean over sideways.
This technique is recommended by some racing cyclists and coaches as offering the possibility of recovering from a skid.
[b]Lean the upper body - keep the cycle more upright[/b]
This approach is popular with riders afraid of hitting a pedal on the road. This is a particular concern for riders of fixed wheel cycles, since they cannot coast through corners.
[b]Lean the upper body and cycle together[/b]
This technique has the advantage of keeping the steering axis, tyre contact and centre of gravity all in the same plane. This preserves the proper handling characteristics of the cycle, and makes a skid less likely.
Some riders believe that sticking out their knee or leaning their body away from the cycle, improves cornering. Sticking out a knee is what riders without cleats do when they stick out a foot in dirt track motorcycle fashion. It is a useless but reassuring gesture that, on uneven roads, actually works against you as any body weight that is not centered over the cycle applies a side load and side loads cause steering motions if the road is not smooth.
To verify this, ride down a straight but rough road standing on one pedal with the bike slanted. Note how the bike follows an erratic line. In contrast, if you ride centered on the bike you can ride no-hands perfectly straight over rough road. When you lean off the bike you cannot ride a smooth line over road irregularities, especially in curves. For best control, stay centered over your bike.
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http://www.cobr.co.uk/e-cobr_informatio ... nering.htm
[b][u]Cornering[/u][/b]
Even at moderate speeds, you achieve most of your steering by leaning the bike, not yanking on the handle bars. The amount of turn depends on how far you lean the bike. Crank it right over for tight radius turns. Conversely, big long sweeping turns require only minimal bike lean.
[b]Body lean[/b]
As you turn, nasty centrifugal forces conspire to flick you off your mount into the gorse bushes on the outside of the corner. Their strength depends on how fast you're travelling. So when you whip around a corner scary fast, you need to lean into it heaps (think about those crazies who race grand prix motor cycles around impossibly tight corners at ridiculous speeds). But because your velocity and the radius of the turn are rarely in perfect sync., you need to lean your bike and your body at different angles. Generally, this means leaning your bike into the turn and keeping your body slightly more upright.
[img]http://www.cobr.co.uk/e-cobr_images/section_images/mtb_images/cornering.gif[/img]
[b]In traction[/b]
To carve out an elegant turn you've gotta speak proper and maintain traction on the front wheel. Do this by subtly moving your weight forward in the turn. Try splaying your elbows - this forces you forward and lowers your centre of gravity. You should almost be able to feel the old knobblies biting in. Beware: overdoing this while hairing down steep hills can result in the big full frontal endo. You also want to keep your weight over the "contact patch", ie. where the tyres meet the dirt. So try to put more weight on your inside hand and on the outside pedal - which you (obviously) must have placed at the bottom of its stroke.
For optimal cornering it pays to enter the corner at the right speed. Before the corner you can brake hard while you're still travelling in a straight line, but often you're forced to take evasive action once you're well and truly in the corner. Try using the back brake to scrub off speed - the front brake will generally force you and your bike to suddenly part company.