Description
Steel sprocket 52 teeth - 420 pitch
Rear sprocket / chainring steel Z52 - 420 Derbi Senda / Rieju MRT, high quality steel chainring for chain type 420. Can be used either as a replacement for a damaged original sprocket or to change the gear ratio.
More traction or top speed
Changing the gear ratio allows you to fine-tune your vehicle’s performance. A larger rear sprocket increases acceleration, as the rear wheel is driven faster at the same engine speed. The result: noticeably stronger pull-off and better performance in lower gears. On the other hand, a smaller rear sprocket can help achieve higher top speeds, which is especially beneficial on long straights or for everyday road use.
Technical data chainring Rieju / Derbi
- Inner diameter: 105mm
- Mounting: 3x2 hole
- 52 teeth
- For chain type 420
Note: As there may be different variants depending on the year of manufacture, please compare the dimensions and teeth of the original sprocket with the illustration and the information given above.
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