MOUNTAIN BIKE TIRE KNOBS, THEIR SHAPES AND POSITIONS:
DRY TERRAIN:
Low tread height means less need for mechanical engagement, tread edges will
grip the hard ground under loose dirt and dust.
Shoulder tread sculpture designed for lateral grip and when leaned at angles,
etc.
The knobs are brought closer together for a better feel.
Usually a faster rolling tread design.
MUDDY TERRAIN:
Height of knobs is important to penetrate mud and find hard ground, mechanical
engagement is important. Knobs shaped like bars, scoops or fingers.
Shoulder tread sculpture designed for lateral grip and when leaned at angles,
etc.
The spacing between the knobs is important to eliminate mud packing, and in not
degrading the feel (suppleness, vibration).
Usually a slower rolling tread design.
MIXED TERRAIN:
A precise mix of the two previous designs.
Tread knobs with basic forms: square, rectangle, with edges and depth of
sculpture built for performance in mud and enhanced surface contact for dry
terrain.
Shoulder tread sculpture designed for lateral grip and when leaned at angles,
etc.