Do you use it with the wheel on the bike?daniell said:On too many occasions I tear the valve while pumping my tires with a frame pump. Perhaps I am not holding it steady enough. I checked the rim hole, and found no sharp edges. I would appreciate some advice.
I would have agreed with this answer for 25 years. In the last 5 or so I've lost more tubes to valve stems separating from the rest of the tube than any other problem.MR_GRUMPY said:User error.
Back when I used a frame pump, I would wrap my thumb over the tire to prevent the jerking movement that might tear the valve.
I only use the frame fit pump (Silca) on the road.danl1 said:Do you use it with the wheel on the bike?
If you do - Don't. That's not what it's meant for and is begging for trouble.
It's a repair tool, meant to be used when fixing a flat - meaning the wheel is off the bike anyway. Held properly with a fist around the head and wheel, there won't be a problem.
For everyday inflation, use a floor pump. Much easier anyway.
If using it with the wheel off of the bike, the most reliable method I've found is to lay the wheel flat on the ground, resting the pump head also on the ground (a curb sometimes comes in handy), and using the pump vertically. It's also biomechanically easier than pushing hand against hand.
Yup. Simple as that.Dinosaur said:I used to have the same problem. When using a frame pump, after attaching the pump valve to the tube, put the valve in the 12 o'clock position and hold the pump with both hands and inflate the tire. The tire/wheel will bounce around but it will not harm the valve stem.
+1 for the same technique.Dinosaur said:I used to have the same problem. When using a frame pump, after attaching the pump valve to the tube, put the valve in the 12 o'clock position and hold the pump with both hands and inflate the tire. The tire/wheel will bounce around but it will not harm the valve stem.
How many pounds of pressure could I expect from a 12 gram cartridge?daniell said:
I'm a recreational rider so proper inflation was never critical to me, just getting home to the floor pump. The frame pump scarred my bike's finish, ripped stems out and basically sapped my energy on a ride so I changed to CO2 and never regretted it. I used cartriges from LBS and also from Walmart. I think you can buy threaded or unthreaded at Wallyworld.daniell said: