Decathlon Rockrider ST50 26" 21-Speed Mountain Bike

3 plates of 7 speeds, 21 speeds!
2 rotating handles that are easy to handle.
On the left (trays): you manage the ascent / descent.
Right (speeds): you adapt your effort more precisely.
Triple chainring 22, 32 and 42 teeth + protection against grease.
MICROSHIFT FD-M20 front.
Derailleur -MICROSHIFT RD-M25.
Rear derailleur -MICROSHIFT MS25 revolving handles, with speed indicators.
SHIMANO 7-pinion cassette 14 to 28 teeth TZ500
Wide and solid chain KMC Z51.