I have a [Firestorm 29D](https://www.firefoxbikes.com/firestorm-29-d/) (3 * 8 gears, 24 total) bike. The shifting is not smooth at all. I would like to upgrade my rear derailer and shifters or groupset to Shimano altus or any other. Kindly suggest me if its possible to do so. **Current configuration:** * Shifters: Microshift TS38-8 3X8 Speed * Crankset: Prowheel 24X34X42T, 170mm * BB Set: Sealed Cartridge * Freewheel: Steel, 12-32T 8 Speed * Wheels: Alloy Double Wall 36H Rims * Rear Derailleur: Microshift RD-M25 ---------------------- I did try tuning it using the barrel adjuster but still the shifts are not smooth. I was thinking of replacing the entire drive train. If Altus is not that good option what do you suggest is a good upgrade? Yes I feel the same this gearset should have been smooth but it is not :( Since I bought this bike 2 months back I have rode a distance of 1000km.