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Old September 12th, 2013, 12:06 PM   #21
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Location: Chicago, Near the Lake
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Originally Posted by WJCIV View Post
Also, when the front wheel of an inline would go into a gap, it won't drop because of the weight distribution. On the back-forward dimension of quads, you only have two points of contact, which means they will always conform to the terrain. On an inline, you have at least three (and usually 4). If one stops making contact with the ground, the others will take on the extra weight.
YES! This is the most critical reason quads are less outdoor safe - ONLY TWO AXLES. Any downward outdoor surface imperfection that the front axle wheels hit means front wheel(s) are going to instantly DROP DOWN into that crack, pocket, hole, since remaining axle alone can't prevent tipping forward, as inlines can.

This tipping forward can cause the dropped wheel become somewhat pinned into the crack, pocket, hole ... which causes further breaking effect, which causes more tipping forward to further aggravate stuck wheel issue.

This can be come a runaway effect that throws the skater forward onto the ground.

Quad setups can be optimized to minimize this effect by having front axles as far forward as possible (see avatar PIC skate), large 70-76mm wheels, softer suspensions, shallower action angles, etc...
However they will never perform as safely as inlines outside. Different outdoor technique that keeps more of your weight on the rear axle by about a 60-40% ratio also helps a lot.

Originally Posted by WJCIV View Post
Another thing is the wheel base. A wider base it more stable. What I am talking about here is not the wheel base of a single skate; it is the wheel base of the skater. Very few people remain on one foot when they start to lose their balance. Between quads and inlines, you have a shorter wheel base side to side on inlines, but your feet are already shoulder width apart. The extra few inches don't mean much. On the other hand, you gain several inches back-to-front, which makes a pretty big difference since the wheel base in that direction is relatively small.
This lateral wheelbase info is really not so useful once you can skate.
Proper skating, outdoors is 90+% on one foot at a time, NOT both feet down. Skating with two skates down, each below shoulders is ONLY for absolute beginners who cannot balance on one foot. Proper skating technique will have you landing your next single foot down placement under the weight focus coming down from the CENTER of your body, not under your shoulder. Maintaining balance rolling on one foot at a time demands it is never placed down on the rolling surface under the shoulder.

Rollin' on AIR
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