You'd probably have a tremendous struggle getting even 110 PSI in the tire with any mini pump. These pumps are meant more for road repairs to get you back home, than they are for maintenance at home. You're in need of a few items. First you should get a hand pump with the air gauge built in for at least 120 pounds PSI. Quality is the name of the game here! Save the mini pump for the road emergencies. Then you need a air pressure gauge that will read up to 120 PSI. They can be purchased at any LBS or automotive type store. They cost anywhere from $5 to $15 depending on what you want in an air gauge. Some take batteries for the gauge to work. Then you just need to "get the feel" of a tire with the pressure you will usually use. You'll learn how much it takes to use your fingers to squeeze a tire with 110 PSI if you get caught with a tire repair and you pocket gauge is at home. You can over inflate a tire by 10 or 20 PSI without worry that the tire will explode off of the rim. You'd really struggle to even get close to 140 PSI in any tire using a mini pump. 90 to 100 PSI in a repaired tire out along the road should get you home safely if you watch where you're running the tires. I have 700c x 32c tires rated at 70 PSI. I regularly pump them up to 80 to 85 PSI on the rear and 80 PSI on the front. No problems with flatting out along the road.