Sold as a kit, SRAM eTap road wireless kit includes everything you need to update your existing road bike to SRAM eTap.
1 x Shifter pair (brake cables and housing included)
1.x Front derailleur with battery
1 x Rear derailleur with battery Short cage (max 28T) Wifli (Max 32T)
1 x SRAM rTap USB dongle with quick start guide
1x Battery charger + power cord
eTap accessories are optional extras.
Sram Etap has it all--it is the easiest to install and the easiest to adjust and it can accommodate any frame. Shifting is intuitive as it matches the shifting on most autos equipped with paddle shifters (except for changing the front derailleur). Etap has a variety of systems that can provide for either hydraulic braking or cable braking and a longer rear derailleur cage is also available to provide lower gearing if needed. Ease of use and ease of maintenance is at the highest level. Battery life is long and recharging time is short, especially compared to other electronic systems. I have had this system in use for the past year with 100% reliability so I feel this is the premier groupset system available today.