Description
Afam Steel Sprocket for Derbi / Gilera / Aprilia
Afam steel sprocket, 59 teeth, for 420 chains; replacement sprocket for the chain drive or to change the gear ratio. The sprocket should be replaced when the teeth become too sharp. After installing the front or rear sprocket, it is essential to readjust the chain tension.
AFAM steel sprockets are manufactured from C45 steel and then heat-treated to achieve greater hardness and durability.
Compatibility
- Aprilia RS50 from 2006 / RS4 and SX50 from 2011
- Derbi GPR from 1997 / Senda from 2011
- Gilera SMT from 2011
- Peugeot XR6 2000–2007
Note: Since there may be different variants depending on the model year and model, please compare the dimensions and number of teeth on your sprocket with the illustration and the specifications. For Derbi, Gilera, and Aprilia, the best way to identify the version is by the bolt pattern (6-bolt or 3x2). Here you’ll find the most common versions.
Details: Afam Steel Sprocket
- Bolt pattern: 6-hole
- Inner diameter: 108 mm
- Chain type: 420
- Teeth: 59
- Color: Silver
- Derbi OEM numbers: 00H01317031, 86182R, 2B004446
Funstion of Rear procket
The rear sprocket of a motorcycle is an essential part of the chain drive. It is mounted directly on the rear wheel and is connected to the front sprocket via a chain.
How can I tell if the sprocket is worn?
You can usually identify rear sprocket wear by inspecting the teeth. Worn teeth have an irregular shape and appear thin, very pointed or bent. You may also notice metallic rattling noises. Severe wear can cause the chain to skip because it slips over the excessively worn teeth.
smaller or larger Sprocket?
- Sprocket with more teeth → improved acceleration
- Sprocket with fewer teeth → higher top speed
You also have to consider the gear ratio between rear and front sprocket. The calculation is: number of teeth of rear sprocket / number of teeth of front spocket. A low ratio increases speed, while a high ratio improves acceleration.
Example: Front sprocket with 13 teeth and rear sprocket with 48 teeth: 48/13 = a ratio of 3.69.
Sprocket types
Steel is preferable to aluminium if you want the longest possible service life. Aluminium is the better choice for maximum performance because it is lighter. Self-cleaning anti-mud rear sprockets are suitable for off-road use in dirt and mud.
Chain care
To ensure optimal life, it is important that you do not neglect chain care, we recommend a special chain brush.
Overview of most common sprockets
- Sprocket, 62 mm internal diameter / 5-hole: Rieju (older models), Peugeot, Motorhispania
- Sprocket, 100 mm internal diameter / 4-hole: Beta RR50 from 2005
- Sprocket, 102 mm internal diameter / 6-hole 3x2: Derbi Senda DRD
- Sprocket, 105 mm internal diameter / 6-hole 3x2: Aprilia, Derbi, Gilera, Rieju, Peugeot, Motorhispania, Yamaha, MBK
- Sprocket, 108 mm internal diameter / 6-hole: Aprilia, Derbi, Gilera
