As you ride, your bike chain will gradually stretch. After about 1% chain stretch, in which your chain has roughly gained 1 whole link in length, your components that touch the chain are sharpened. So much so that if you were to just replace your chain, the new chain would slip and skip over your old drivetrain. The higher end the bike the more this issue will cost. To prevent this from happening replacing your chain before it hits 1% is crucial. Paramount will check your chain as part of any tune-up that we offer. Cable tension is how your bike shifts from one gear to another. Cables do stretch so adjustments can be done to optimize this feature. However, cables are typically open to the elements so grit and grime can clog your housing preventing the cable to freely glide to allow your gears to shift correctly. It’s an easy fix; you replace both the cable and housing. It’s kind of like an oil change on a car. This will make your bike shift like new. Paramount services most bikes, come in and see what you can do to make your bike ride better.