CatEye Padrone Digital Bike Computer - Wireless Black Model=AMPP 1100 Headlight They are designed for cranks

They are designed for cranks like Shimano Dura-Ace FC7950 Ultegra FC6750 Shimano 105 5750 and others with a 5-bolt fitting

}Wolf Tooth Seatpost Clamp - 31

rechargeable and affordable package

Wear optimized ring design

CatEye Padrone Digital Bike Computer - Wireless Black Model=AMPP 1100 Headlight They are designed for cranksCatEye Padrone Digital Bike Computer Wireless Black. The CatEye Padrone Digital Wireless shows your cadence and ride stats on a large 3 row screen with up to four data displays and allows you to sync the unit to a smartphone via Bluetooth. TECH SPECS Touchscreen NoRechargeable Battery NoANT Compatibility NoCadence OptionalColor Screen NoColor BlackGPS Enabled NoHeart Rate OptionalBluetooth Compatibility YesWIFI NoWireless Yes