I hope this photo doesn't upload as big as it looks on my end. I broke my leg last June on my first ride out on my Trek Marlin... You all helped me realize it was too high of a PSI. I have recently got new tires... Hillbilly Grip. If you look them up, they are just knobby and pretty aggressive. I've read that they are great for mud but squirrely on gravel... yes, they are right. I'm considering getting some other tires instead as this is the type of gravel I ride on daily. I really need some stability, am willing to take some classes too as I know it's not all about tires, but am wondering what would be good on this type of gravel/rock. WTB Riddler Maybe? Anyone else ride on this stuff? Thanks a bunch. By the way I was 215 lbs last year from 245, when I broke my leg, now in the 160's and rode 34 miles one day a couple weeks ago. Average 20 miles on this gravel daily.