I have a pair of road bike tires currently 700 x 32. In a couple weeks I am going to a place with some friends where the trails are 90% crushed gravel. Because of some size restrictions on a custom bike (my forks are very close) I want to stay with 700 x 32 or 34. Any ideas for this crushed gravel ?? Bye the way I purchased this bike used so I don't no why the forks. It rides like a champ though.