With their 3.4 gr. weight, Extralite ExtraBolt 3.3 is the lightest and finest cassette lockring available on the market. It's CNC made 7075T6 aluminum and available in several beautiful anodized colours with laser etched graphics.

Its special design allow to fit 11T and 12T first gears both. It doesn't fit Sram XD type cassettes with 10T gears in first position.
ExtraBolt 3.3 fits Shimano 9-10-11 s and Sram 9-10 s cassettes. For other combinations please give a look at other type of ExtraBolts 3.4 and 3.5.

You can install Extrabolt 3.3 as all other standard cassette lockrings using Shimano TL-LR15 tool or similar.

If your cassette has stock steel lockring you can save a bit of weight, but you can also customize your bike at the same time.
ExtraBolt 3.3 and 3.4 are 100% made in Italy.
