Description
Afam steel sprocket for Derbi Senda DRD / X-Treme
Afam steel rear sprocket with 53 teeth for 420 chains. This part serves as a replacement for the original rear sprocket or lets you adjust the gear ratio. You should replace the sprocket once the teeth become too sharp. After you have installed the front or rear sprocket, check and adjust chain tension.
AFAM manufactures these steel sprockets from C45 steel and treats them afterwards to ensure high hardness and durability.
Compatibility
- Aprilia RX 50 from 2011
- Derbi Senda DRD up to 2012 / DRD X-Treme from 2011 (except SM)
- Gilera RCR 50 from 2011
Sprockets with a 102mm inner diameter were quite rare before 2012 and appeared mostly on Derbi DRD models. From 2011 onwards, manufacturers used them for the Derbi Senda X-Treme with 21"/18" wheels, as well as for the Aprilia RX50 and Gilera RCR50.
Note: There are different variants depending on the model and year of manufacture. You should always compare the dimensions and tooth count of your sprocket with the image and technical data. Here's a list with the most common versions.
Details Afam steel sprocket
- Mounting: 6-hole 3x2
- Inner diameter: 102mm
- Chain type: 420
- Teeth: 53
- Color: Silver
- Derbi OEM numbers: 2B004447
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