I bought MTB Giant Alias last year and found few things unusual and need advice
1) I am getting loose contact feeling from the bottom crank when I shifted to higher speed ie. 5th or above it feels like one ball bearing is missing.. I tried moving crank handle sideway and it is ok.
2) the chain is touching front derrailleur when I am using biggest chainring with smallest gear (highest speed)
are these prob related? how to fix or what adjustments required? thanks