Gear Components

Mountain Bike Gear Shifting System Components

This to give you an idea what happens technically if you shift gears;

Chain Rings - bolted into the cranks.
 It come in three size ranges.

1. big ring (48-42 teeth),
2. middle ring (36-32 teeth), 
3. small or "granny ring" (26-20 teeth).

The "sprockets" or "cogs" - found in the rear hub.

• Modern sprockets consist of  7-9 size ranges from 36-11 teeth.
• Normally, the 7 & 9 speed sprockets have the same heavy and light gear.
• The difference is in the mid-range gears.
• The 9-speed sprocket has more mid-range speed which lessens the change in speed upon up or down shift.

Rear derailleur Components

Crank Components