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Discussion Starter · #1 ·
not sure where to post this, but beginner forum just sounds right:p

i ride my bike to some local trails. normally 60lbs on street. i would like to air down my tires to about 30 when i get to the dirt. will those small portable bike pumps reinflate my tires back to 60lbs.??? does it take forever to pump that pressure. are the pumps durable? economic friendly pump under $20.00 is it possible?
 

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I have the Crank Bros. mini pump with pressure guage. It works but it sucks. It's hard to keep a seal on the presta valve and it takes forever to inflate a tube to 30 to 35 psi. It's good to have in a jam when you flat but do yourself a favor and buy a floor if you don't already have one. I've been told that as a rule of thumb mini pumps tend to be inefficient. However I only have experience with the CB.
 

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Discussion Starter · #4 ·
300 pumps:eek: i dont think viagra can even help me on this one.:p
anyways i guess inflating from 30 psi to 60 ( to ride back home) is out of the question

so is it safe to say that the mini pump are for emegencys so that you can fix a flat to ride back to your car instedd of walking
 

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Just ride home at 30psi and use a floor pump to get back to 60psi.

Floor pumps slay mini pumps. Mini pumps are designed for emergencies only and in my experience using them regularly will rapidly cause them to fail.
 

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I have a blackburn mammoth mini pump that I carry out on the trail with me when I ride just in case. it is both schrader and presta compatible. I've been lucky enough to not need it on a trail yet but I used it at home once just to get the feel of how it works, and because I just got wheels with presta tube compatibility and didn't have a presta adapter for my air compressor and no floor pump. the pump worked but it took forever just to get to trail pressure, I wouldn't want to try to get it to street pressure with mountain tubes. floor pumps are great to have and they work much better than mini pumps.
 

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Anarvrin I can't figure out how to switch the blackburn mammoth from presta to shcrader

do you pull the little piece out and flip it around?
 

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yakmastermax said:
Anarvrin I can't figure out how to switch the blackburn mammoth from presta to shcrader

do you pull the little piece out and flip it around?
when you take the metal end cap off there is a gray rubber piece and underneath that a black plastic piece. pull them both out a flip them around (easiest if done with the pump between on an off positions. for schrader use the small knob on the plastic piece and the larger opening of the gray rubber piece should be facing out. for presta it's the opposite.
 

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I have the Axiom Dominate Air DLX Gauge pump and it has worked well for me. I dont run over 55psi, but getting there is a bit of work, but not that bad.
 

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I have a Topeak pump that allows air to be pumped in on both the push AND pull stroke; i guess this effectively halves the amount of time it takes to pump using a mini pump, but its still quite a work out (being a mini pump).
 

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The Blackburn Mammoth is a great pump. It pumps up tires pretty fast, but I've never hit 60 psi on it (haven't tried really). I don't have a problem getting to 40-45 psi. I got the Mammoth for under $20 at Amazon.com (but purchased some other stuff to get free shipping).
 

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Discussion Starter · #13 ·
thanks 4 the info. i ended up getting a blackburn mammoth. i should have mentioned that i weigh 185# so when ii ride with 30psi i feel like im riding on flat tires. anyways thanx again 4 the help. if the mammoth doesnt cut it i can always ride to a gas station and pay the 0.75 cents :eekster: for the sir compressor:)
 

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I ride to and from the trails. Lately with the dryer weather I've been running my tires at 35psi. But in the winter months, I'm closer to 25psi. I ride back and forth on that as well.

So the difference between road pressure and trail pressure means your transit takes 2 minutes longer?? Suffer... or drive. (tongue in cheek)

I've found portable pumps aren't made for regular inflation like that. They wear out as well as just makes you tired. I helped an older lady on the ride home. She had like 5psi in her tires. So I used my pump (had to swap from presta to schraeder) and then pump like forever to get her pressure closer to 40-ish. x2 tires. I could not imagine doing that on a regular basis.
 

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s0ckeyeus said:
The Blackburn Mammoth is a great pump. It pumps up tires pretty fast, but I've never hit 60 psi on it (haven't tried really). I don't have a problem getting to 40-45 psi. I got the Mammoth for under $20 at Amazon.com (but purchased some other stuff to get free shipping).
I have been using the mammoth mountain for over 14 years with no problems. I lost my first incarnation of the pump in 2005 and replaced it with the same thing.
 

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anyone here use the Specialized PVO frame pump? how does it compare? i'm looking for a good bang for your buck pump to mount to my frame
 

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louisssss said:
anyone here use the Specialized PVO frame pump? how does it compare? i'm looking for a good bang for your buck pump to mount to my frame
I'm not too familiar with the PVO, but the Mammoth probably pumps a higher volume of air into the tire with each stroke, which means you won't have to use quite as many strokes to fill the tire. The Mammoth is a no-frills pump with solid construction and a great lifetime warranty. I'd rank it pretty high up on the "bang for your buck" scale.
 
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