Odd question, but new to road bikes and carbon forks..... My Giant SCR2 is about 1 year old and done just over 1000 miles so far with no problems at all. I've noticed that if I pick up the front of the bike and gently bounce it on the ground the whole front wheel "buzzes" for a second or so. I don't know if this is normal or if there is a problem which i need to get sorted? When riding there is no vibration problem but occasionally getting a rattling sound as if there is a stone caught under the mudguard - I've checked all the bolts / screws etc that I can find and all seem tight. Any advice gratefully received.