RNC V3.141 Titanium Cranks (24mm / 125mm - 180mm)

These are the lightest titanium cranks we have produced yet & also the first heat treated arms that allow us to push the limits on weight & strength. The arms & spindle are CNC machined from heat treated & aged 6al-4v aerospace grade titanium w/ a 170,000 ultimate tensile strength. The arms & spindle attach together using what's called a hirth joint. This makes installation super easy just bolt & unbolt your crank arms. No pounding your arms on & off w/ a hammer or needing special install tools; Just a 12mm hex key. They come with a built in adjustable threaded cone washer. This allows you to preload your bearings if you want to run your cranks tight so they don't spin or loose depending on your preference. The flush mount bolts are made from Maraging 300 steel w/ a 300,000 ultimate tensile strength. This is the most critical strength part of the crank so we chose the strongest material available. Spline drive cranks have the Profile flower shape built into the arms. Also available in bolt drive.