Indexed, 21-speed, gear change with SRAM grip shifters.
7-speed Shimano TZ21 cassette.
Rust-proof SRAM chain.
Front derailleur: SHIMANO TZ31.
Rear derailleur: SRAM 3.0.
Metres of development for a 26" wheel: 1m50 - 6m01.
Metres of development for a 28" wheel: 1m76 - 7m02.
Chainrings: 48 / 38 / 28.
Cogs: 14 / 28.