Originally Posted by Sloppyburpfest
Locking the front wheel = low side kind of accident. You will basically fall down towards the side you were leaning towards.
Locking the rear wheel and letting go of it on a good surface = high side kind of accident. The bike violently throws you off in the opposite direction that it was initially leaning.
Just being picky here, but locking your front while leaned over usually will result in a high side. The front stops and the bike staightens up...violently.
Locking the rear will usually cause a low side , but as you mentioned, if the rear end has already lost traction and has broken loose, and you let go of the rear brake, real good chance it will highside.
You have to keep in mind there is a difference between skidding and sliding. The rear end can "slide" but the wheel is still turning and has forward traction. If the the wheel stops turning, or looses traction so it is no longer driving the bike forward, then it is a skid.
Modern ABS systems react in 1/10,000ths of a secound, Older ABS might have left "dashes" but the ones on bikes now release the wheel long before rubber gets laid.
"If you lock up your wheels while leaning in a turn you will fall down before the anti-lock brakes detect the skid and start working
You may not have "locked" the wheel, because you can fall down because you simply over braked...not because the wheel ever locks up. If your going 35 mph through a turn and you slow the wheel down so it is only turning at 30 mph you can loose traction , low side or high side with out the wheel actually being "locked"...(not turning) ABS will not kick in because the bike itself has slowed down, which will still make you fall , or because the wheel has not locked up.
The point here is if you brake hard enough to even get close to
"locking the wheel(s)" while leaned over in a turn, you are going to eat asphalt, but it not because the ABS did not have time to react, it is because you have upset the balance of the two forces working on the bike.(See my other post) and have sealed your fate..the bike will begin to fall or flip nano seconds before the wheel actually stops spinning, and that is why the ABS would be useless in a turn.
New ABS systems also can compare wheel speed of front and rear wheels to make sure they are the same when braking, and the same sensors are used in traction controll systems to make sure when you grab some throttle going through a turn you don't break the rear tire loose by opening it up too much (a possible problem with mega horsepower bikes) or to keep you in controll if you are " accelerating abruptly while swerving"...