Mountain Biking - carrying a shock pump for use on tires
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01-11-09, 06:41 PM
i have this pump that i use occasionally. although the gauge goes to 120 psi i never had the patience to pump a tire past 20 psi. i like to keep it in my seat pack on my road bike
i like to keep a dedicated set of tools in my seat pack for road cycling and a separate set in my camelbak for trail riding. i got sick of swapping stuff around a couple times a day.. i just wanna hop on the saddle and ride
so anyway i was thinking of killing 2 birds with one stone, i need to own a shock pump, and i need another small pump for flats. i don't think many people carry a fork pump on rides but.. the added versatility to adjust fork pressure on the fly would be nice.
would that be suitable to pump up a fixed flat on the trail? i know it pushes a small volume of air per stroke but it cant be worse than the dinky crank brothers pump.
01-11-09, 06:49 PM
You'd be waiting a really long time to get your tire pumped up. Get a CO2 kit and throw it along with a few extra cartridges into your Camelbak.
Carrying a shock pump, IMO, is done seldom. I brought one with me for a little while to get things dialed in, but I'll leave it in the car at most. You should have a shock pump, but you'll get tired of carrying it around.
01-11-09, 07:40 PM
Shock pumps are made for high pressure low volume applications. The pump will work put it will take a long time to air up a tire.
01-11-09, 07:45 PM
well did you look at that first pump? i cant imagine there's a lower volume pump than that
The first one has a chamber that extends as you pull the handle out (I think) and the chamber diameter is just under an inch.(I think..again)
A shock pump chamber is like 1/4" (I think...again...more) so it pumps low volume stuff up in tiny incriments. Pumping up a road tire to 20psi would take a million years. Pumping up a MTB tire to 35psi would take a billion years...(I think)
01-11-09, 08:01 PM
As low volume as that pump might be shock pumps are even lower.
01-11-09, 08:52 PM
well i was afraid of that. thanks for the replies. it would have been awesome
Here dood...just get this'n:
01-11-09, 09:17 PM
I have used a shock pump to fill my tires in a worst case. They are right it takes years!!!! If you are to carry a pump, carry one ment for tires.
01-12-09, 12:35 AM
I've got one of those Crank Bros. pumps. Sucky, to be charitable to the thing. I went back to using an old Blackburn pump - works much better. Since all my bikes are air sprung forked and rear shocked, I carry a small basic shock pump as well. I'd rather have it along and not need it than the reverse.
Using a shock pump to inflate a tire, as others have said, would take forever.
Also tried a combo tire/shock pump made by Specialized. It sucks. It works, but is fiddly and takes longer to fill either than a dedicated tire or shock pump. Wonder if that Serfas one is any better. IMO, Blackburn makes the best offroad pumps. Would love to see them come up with a nice high volume/high pressure capable combo pump.
01-12-09, 03:20 AM
Using that pump for MTB is analogous to using a shot glass to fill a swimming pool.
Any light cheapo wide barrel telescoping pump would be better than that thing. And don't go CO2, unless it's for race use. To finicky, too high risk, too wasteful.
Giyo GS-41: http://www.giyo.com.tw/web/03product/03shock/GS-41.htm (http://www.giyo.com.tw/web/03product/03shock/GS-41.htm)
*this pump and a few other Giyo models are often rebadged by other companies and sold as their own.
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