You guys push some real big boy gears compared to my SS mountain bikes. I run a 30t oval 18t cog with 27.5x2.6" tires on one and 34/18 on the mixed surface gravel.singletrack/street bike with 29x2.5" Surly Extraterrestrials. I'll take my mountain bike up and down some of the gnarliest terrain available so if I'm not geared real low I wouldn't be able to ride up 1/2 the stuff I do.