Description
IGM Steel sprocket for Senda DRD / RX50 / RCR50
High-quality, reinforced steel rear sprocket from IGM for 420 chains (standard). Can be used either as a replacement for a damaged original sprocket or to change the gear ratio.
We also recommend replacing the front sprocket and the chain. You can also simply replace the entire chain drive with a complete chain set.
Compatibility
- Aprilia RX 50 from 2011
- Derbi Senda DRD through 2012 / DRD X-Treme from 2011 (not SM)
- Gilera RCR 50 from 2011
Chain sprockets with an inner diameter of 102 mm were relatively rare before 2012 and were mainly installed on Derbi DRD models. Starting in 2011, they were installed on the Derbi Senda X-Treme with 21"/18" tires, as well as on the Aprilia RX 50 and Gilera RCR 50.
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 provided. Here you’ll find the most common versions.
Details Derbi DRD Sprocket
- Mounting: 6-hole 3x2
- Inner diameter: 102 mm
- Chain type: 420
- Teeth: 48
- Color: Silver
- Derbi OEM number: 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