The Merritt Brandon Begin Pentaguard Sprocket can be run on 19mm

XX Small/X Small: 48 - 51cm head circumference

a 9 tooth driver and includes drive and non-drive side nylon guards

The Box One Levers are cold forged and CNC-machined from the highest-quality 6061-T6 aluminum

Offset: 31mm

SD B-85 4 Hole Crankset Colour:Black The Merritt Brandon Begin PentaguardThe all new SD B 85 Crankset performs as well as it looks. It is very rigid and light for fast out of the gate acceleration, and thanks to the hidden chain ring bolts it has a clean and sleek look. SD B 85 cranksets have a unique way of installing your chainring. There is no need anymore for two piece chainring bolts. The hex bolts (no 5) screw directly into the crank arms for easy installing and changing your chainring. If you're looking for that