How to know the size of your transmission

There are two types of transmission on all pocket:
- Small pitch Transmission, identified by " #25 "
- Transmission for large drive chain, identified by " TF8 ".

To know the transmission of your pocket bike, this is extremely simple. Look at the pictures below and compare with the transmission of your pocket

Transmission for chain with small pitch: #25 The thickness of the tooth is 3 mm.

Transmission for large drive chain: TF8 The thickness of the tooth is 4 mm

For the choice of the sprocket, be careful because there are several kinds.

Some examples of sprocket that you will find on our site:
- 10 Tooth Reinforced Front Sprocket - small pitch - American thread
- 6 Tooth Reinforced Front Sprocket for Pocket Bike - TF8 chain (8mm) - American thread
- 7 Tooth Reinforced Front Sprocket - small pitch - American thread
- 6 Tooth Reinforced Front Sprocket (type F) - TF8