WD-40 doesn't stay on the chain and it will drip creating a mess at home. Check out the finish line dry or wet lubes and really feel the difference shifting gears . When you have ridden the bike lets say a month. Get your wheel set tighten as your body weight will cause the new wheel set to adjust itself. That includes adjusting clearance of your disc brake pads. By doing all this , you will create less drag and a smoother ride. Dont be alarm by noises coming from the brake pads as they are new . Effective controlled braking only comes in when you run them for a month or so. OOps got carried away there, i use finish line and they really stick to your chain .