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Potential hazards caused by pump placement?

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Potential hazards caused by pump placement?

Old 06-26-08, 03:52 AM
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round-the-bend
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Potential hazards caused by pump placement?

Has anybody had a mini pump fall off when fitted under the down tube bottle cage?
I had a freak hi-speed accident and i am trying to find out how it happened. I'm pretty sure it was caused by the pump falling off and jamming the back wheel but I can't work out how.
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Old 06-26-08, 03:57 AM
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Originally Posted by round-the-bend View Post
Has anybody had a mini pump fall off when fitted under the down tube bottle cage?
I had a freak hi-speed accident and i am trying to find out how it happened. I'm pretty sure it was caused by the pump falling off and jamming the back wheel but I can't work out how.
no.
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Old 06-26-08, 04:03 AM
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Matt Gaunt
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Seems very unlikely that this would be the case, especially from the downtube. Even the seat tube mounting would be very unlikely to cause such an accident. How loose is your pump? You might consider a velcro strap of some sort to prevent future incidents if you're sure this is the cause.

What happened exactly?
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Old 06-26-08, 04:20 AM
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My pump is mounted right next to the downtube bottle cage, kind of on the side of the bike. While I've never knocked the pump out of its housing, I have knocked it loose once or twice with my bottle.

It has two plastic "C" clips and both times I have knocked it out of the top one. One good bump or and it would have fallen out completely. If your pump is similarly mounted it's not inconcievable that the wind and your pedaling shook it loose.
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Old 06-26-08, 04:46 AM
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My pump is mounted on the chainwheel side (Polar sensor stops me from mounting on other side) under the bottle cage and has a velcro strap as well as two loose fitting plastic C clips and I've never had any problems.
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Old 06-26-08, 05:24 AM
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The pump was in 2 c clips and had a Velcro strap round it. The Velcro strap was snapped in the accident.
The pump had a ring of rubber 'dirt' round the carbon barrel from where it had rubbed on the tyre and the back tyre was rubbed clean. The pump was found on the road in two parts – the barrel and the handle. The handle had come unscrewed. I thought originally that the pump had got stuck between the seat tube and the back wheel but there is no marking on the frame at all.
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Old 06-26-08, 03:29 PM
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I had my down tube (NDS) cage mounted mini-pump slip down a few times going over bumpy sections of road or those metal construction grates. It had a large C-clamp and velcro straps holding it in place. It would slip down and thankfully the T-handle would catch on the velcro straps prevent it from dragging on the ground or getting thrown into the spokes. (Since this happened more than once, I would always make sure that the velcro straps were as tight as they could be.)

I fixed it by putting one or two layers of black electric tape on the inside of the C-shaped mounting clamp. That tightened up the diameter and added bit of rubbery friction to keep it from slipping. Going over the same rough spots again on the following weeks, my pump didn't move at all. You still gotta make the straps tight, though.

Then I got sick of looking at a mini-pump and got a CO2 air chuck and just threw that into my seat bag. Never once used the mini-pump (but have used the CO2).
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Old 06-26-08, 03:34 PM
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I'd invest in a frame pump, personally. Those minis take forever.
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Old 06-26-08, 04:45 PM
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Originally Posted by Falchoon View Post
My pump is mounted on the chainwheel side (Polar sensor stops me from mounting on other side) under the bottle cage and has a velcro strap as well as two loose fitting plastic C clips and I've never had any problems.
+1
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