Gravel means a lot of things to a lot of people. Some I know put 28-32 mm tires that can fit on existing or older bikes to ride rail trails and pathways and do fine. For single track and gravel that is a mess or loose, bigger tires mean a lot. The geometry of the bike may or may not make a big difference along those same lines. Single track and challenging unpaved roads can make wider tires and more slack geometry really important for an enjoyable or functional ride. People also ride MTBs for gravel.A got somebody looking to trade my MTB for this. He said it's a 2016, but I think it's older. My question is, can this be a gravel,light trail bike?