SIRDAR Mountain Bike Wheel 27.5  inch, aluminum alloy frame, 27 speed gears, JULY
Frame: Aluminum alloy
Frame size: 16.5"
Wheel: Aluminum alloy double rim
Wheel : 27.5
Hand brake: aluminum alloy
Front fork legs : Aluminum alloy shock absorber
Stem : Aluminum Alloy
Handle bar : Aluminum alloy
Spinning leg: ball bearing, aluminum alloy material
Brakes: Disc brakes - front - rear
Hub: Quick release axle, front and rear
Gear set: 27 speed 
Front derailleur : FD-M20 L-TW00
Rear Derailleur : RD-M219 L-TW00
with red tail lights Flashing type with battery 1 set