I own a 6 months old Rockrider 5.2 mountain bike.
Everything was great until recently I noticed that the Rear Derailleur of my bike doesn't reach the highest gear cog, which is 8th. Its always stuck on 7th.
I tried opening the H-Limit screw completely and it even came off, but my chain doesn't still move to the highest cog.
I have a beautiful Sunday morning ride planned in 6 hours from now. Can anybody help?