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-   -   Pedal strikes (https://www.bikeforums.net/33-road-bike-racing/518385-pedal-strikes.html)

CrimsonKarter21 03-11-09 09:57 AM


Originally Posted by seanmdo (Post 8509898)

As noted above, carry more speed, lean the bike more or your body but don't push it to save what you think may be .015 seconds on the exit. If more people considered the their own safety as well as the safety of others bike racing would be a little better for it. Nothing worse than some no holds barred cat 4 racer who takes out someone else be being overly agressive... 99% of us have day jobs and families and hate road rash, broken bones and ambulance bills!

+1, it's like those dicklicks on the road that step on the gas to pass you only to slam the brakes as soon as they get around you. It only gives the perceived notion that they've just saved time.

Fat Boy 03-11-09 10:15 AM


Originally Posted by Val23708 (Post 8497330)
cars have four wheels and can go through corners sideways to go faster..

No. Sideways is slow on pavement, the only place it works is on sprint car ovals, and they do it for braking, not to help cornering. Watch them when they are accelerating, dead straight.

Fat Boy 03-11-09 10:34 AM


Originally Posted by sac02 (Post 8495809)
Noted, with quote. :)
As I mentioned, I've driven a Miata, but it's been a while. It's just starting to come back to me what an underpowered vehicle needs compared to the FSAE car I've been driving the past year. Like the Miata, the bicycle needs to maintain as much speed through the corner as possible because the power to accelerate out of the corner just isn't available (or it costs you a match). With a Viper, you try to get on the gas as sooon as possible to take advantage of the strong ability of the car to accelerate.

Actually, a LOT from my auto racing background has come in useful on a bike - racing line, vision, how to deal with the pressure and not make a mistake when someone is behind you trying to pass, etc.

Mac

OK, you're getting there. Entry speed is everything on an underpowered anything. On something with a lot of power, it's merely very, very important.

For a bike or underpowered car, you have to be comfortable rolling as much speed as possible across the center of the corner. There will be a point where you need to be accelerating, but you end up compromising that to some extent to be able to float more speed across the center.

On something overpowered (the Viper is a good example, because their cornering is mediocre compared to their forward acceleration), You still work to carry a ton of entry speed, but your compromise comes earlier in the corner. In this situation, you can give away (quite a bit of) mid-corner speed to get the car pointed earlier in the corner and go to the throttle sooner. The most common mistake drivers do with an overpowered car is trying to roll too much speed across the center and then applying the throttle slowly, to avoid wheelspin. The correct approach, nearly always, is to not worry at all about mid-corner rolling speed, get the steering out of the car, and go to throttle very quickly. The point at which you initiate throttle is not important. The point at which you reach full throttle is vitally important. This is directly applicable to your FSAE car, especially since most of the corners are ridiculously tight. You'll be amazed that a car that was understeering now suddenly handles quite well.

You're right that car racing ideas transfer over to bikes. It's the application of the principles that's tricky. If you're clipping pedals consistently, then you're probably not carrying enough entry-to-midcorner speed. If you were carrying more, then you wouldn't feel the need to pedal. Just like the guy in a car who doesn't carry enough speed into the corner and then goes to a 10% 'maintenance throttle'. If he carried more in, the he'd be completely off the gas and have a car that worked better. Once the bike straightens up 5%, then pedal away.

As most people would tell you, you can have pedal strikes and not crash. They happen all the time, but don't go looking for them. Sooner or later, they will catch you out.

Talon 03-11-09 03:19 PM

WRT clipping pedals, some bike/pedal combos will strike earlier/easier than others. If your bike has a low bb, long cranks and wide, thick pedals, then you'll clip a pedal easier, but it won't be as dangerous since the bike will be more upright when it happens. If your bike has a high bb, short cranks and modern pedals with generous cornering clearance, then you'll be leaned over farther before the pedal touches down, and it will cause a nasty crash when it happens.

Also, now that you've clipped a pedal several times, you should know how far you can lean before touchdown. You should also know when to coast for 1/2 second to avoid a hard pedal strike. You now know something that will let you corner faster with more safety. Use it wisely.

wfrogge 03-11-09 03:24 PM

Easy in, hard out.

slim_77 03-11-09 04:37 PM


Originally Posted by wfrogge (Post 8512120)
Easy in, hard out.

exactly.


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