The first step in tuning a bicycle is to check the gears and derailleur. The front and rear derailleurs should shift smoothly into the cogs without skipping gears. The cable tension can be adjusted by unscrewing the barrel adjuster. The tighter the cable, the faster the shift into the smaller cogs. During the next step, you should try to loosen or tighten the nuts on the bottom of the gears.
The next step in tune-up is to check the brakes and gears. You should be able to shift through the gears with ease. The derailleurs should be adjusted to provide smooth, and safe gear shifting. If they're not, you may need to replace them. The brakes should also be adjusted properly to stop your bike firmly. Then, you should check the tires. To make sure that they're aligned, check the tire pressure, and clean them.
The last step is to clean and lubricate the wheels. The front and rear brakes should be removed to clean the wheels. The derailleur needs to be adjusted if you want to ride smoothly. You should also check all bolts on the bicycle, as the threads may get loose over time. Be careful not to overtighten any of the bolts because it can ruin the threads. You can do this by rocking the bike from side to side.
If you're unsure how to tune a bicycle, try this simple test: leaning the bike from side to side, pedaling hard and slamming on the brakes. Once you've finished with this, the bike is tuned. Don't forget to clean the brake pads as they can be worn out over time. As you can see, there are many ways to tune a bicycle.