We put the Core Pump on dirt, and optimized it for road, cross, gravel. This pump can handle the pressure. The smaller diameter barrel ensures that high pressures are easy to reach. Perfect for road, cyclocross or gravel tires (whatever those are). Get loose. You can if you want but your valves shouldn't. There's a handy, machined Presta valve core tool right in the pump's base to keep everything snug. The thread-on Presta valve at the end of the extending flexible hose ensures that even the fiddliest of valves is held securely for inflation. Fits easily into a jersey pocket but also will nestle unobtrusively next to your bottle cage so you'll never leave home without it.Machined Presta valve core tool in the pump's base,Thread-on Presta valve on the extending flexible hose,Fits easily in jersey pocket or next to your bottle cage,Up to 120 PSI.