Standard 8mm Drive Chain 05T / T8F - 144 Links T8F (8mm) chain is most commonly used on 2-stroke 43cc-50cc pocket bikes, mini-choppers and electric scooters.  There are two sizes of 8mm chain, 05T that has a 4.61mm roller width and 05B that has a 3mm roller width.  Chain counts include both inner and outer plates.  This drive chain measurements are: 144 links - about 116cm (45.5 in) long Outer width: 10mm  Chain Pitch (distance from pin to pin):  8mm   Roller diameter: 4.61mm With master link IMPORTANT NOTE: Measure your old chain to make sure correct chain is ordered. Some of the front drive sprockets will have numbers on them which identify exactly what chain number is used. Shipping details: Do you need your chain fast?  If you order before 3:00 pm CST, Monday thru Friday, your order goes out the same day.    Buy now!