FSA Powerbox Carbon MTB 11 Speed ChainsetEngineered for mountain bike riding, this powermeter chainset is equipped with hollow carbon composite crankarms, so you can enjoy its superior strength to weight ratio on every training session. FSA has also equipped this model with an aluminium chainring that’s been put through a CNC-machining process for further weight savings. This results in an incredibly strong and lightweight powermeter that’s engineered for maximum performance as you battle to reach your goals.Ready for training, this 11 speed model is kitted out with a BB392EVO 30mm axle for straight-forward bottom bracket installation (sold separately). Another highlight is this model’s convertible spider design, which allows you to fit different chainring and chainline configurations.Engineered for precision, this chainset comes with included Bluetooth connectivity as well as right and left leg balance. Its Bluetooth technology easily pairs to your bike computer, so you can track your progress accurately. With both right and left leg balance, you will benefit from being able to see the percentage each leg is contributing to your total power output. Features: Crankarm Material: Hollow Carbon Composite Crankarm Finish: UD Finish Chainring Material: CNC-machined 100% AL7075 Aluminium Spindle: BB392Evo 30mm AL7050 Alloy axle fits every MTB frame (purchase BB separately) Use: MTB BCD: 96/38mm Speed: Shimano and SRAM 11 speed Tooth Count: Multiple options available Crank Arm Length: Multiple options availableIncludes: R/L Balance and BluetoothWeight: 789gTechnologies:Now available for download and purchase are the PowerBox Upgrades for the FSA PowerBox giving additional data during the ride and for analysing your training sessions. Upgrades available are: Bluetooth (Included): With this upgrade your FSA PowerBox can transmit data via Bluetooth Low Energy (BLE or Bluetooth Smart) to your bike computer.Left/Right-Balance (Included): The L/R balance shows you the percentage each leg is contributing to your total power output. (power left = pressure on the left pedal + pull up on the right pedal; power right = pressure on the right pedal + pull up on the left pedal).Pedal Smoothness Upgrade (Not Included): Pedal smoothness is an advanced metric for riders who want to optimize their pedaling. It shows you how evenly power is applied throughout the whole 360 degree pedal rotation. FSA PowerBox power meters collect the data for both legs combined. Please note that transmission of this data to your bike computer is only possible via ANT+.Convertible Spider Design: Convertible spider design for different chainring and chainline configurations. A Fundamental Tool: The FSA MTB Carbon PowerBox is an ultralight fundamental tool that will help athletes track their data directly during both training sessions and races: in fact, the many advantages provided during a race are much more important than a few grams difference. Precision: A +/-2% accuracy precision is the key quality you want in a power meter. Nowadays, powermeter cranks represent a fundamental tool that will help riders track their data directly during training sessions and to be increasingly more competitive on race day. Included Upgrades: Bluetooth connectivity and Left & Right leg output analysis are already included without additional cost.Buy FSA Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.