I have 32mm tires on right now. I can, and have ridden on gravel but the tires just don't give enough cushion and after 10 miles everything was sore and I still had 20 miles to get home so it's not worth repeating in my book. I was looking at my bike last night as I rode though and I have fenders and a front rack with a narrow profile on it and while I could get away with slightly wider tires it wouldn't allow for much wider. I'll have to take my bike to a shop with me and see what fits in my fenders. Thanks for your help!

Tiff