Need a new pump for my fatbike as my old one broke. Any suggestions for a good quality and low weight pump that I can fit to the bike or put in my backpack?
Pump for fatbike
Emil N
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I went with the Lezyne Sport Drive Hv Hand Pump. This was the High volume model without a gauge. I verified on a scale that it weighed 77 grams with the included hose and 85 with the under bottle mount. (Compared to the ultimate LEZYNE Micro Floor Drive XL at 365 grams which I carried for years and seldom used.) I prefer a hose over direct mount; and a screw on pump vs the friction/oring design of many models. The pump including the frame mount, devoured a $20 bill . I only want it for emergency/insurance use. I could care less if it takes me an additional 5 minutes of pumping. I wrapped it with saran wrap to keep it dry and clean and mounted it under my bottle mount. We will see if that helps! YMMV
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2 questions if I may...
1. Has anyone parked their conscience at the door and tried the Specialized Big Bore pump?
2. How effective is it on 2.3 and 2.5 tires?
Thanks guys.
1. Has anyone parked their conscience at the door and tried the Specialized Big Bore pump?
2. How effective is it on 2.3 and 2.5 tires?
Thanks guys.
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7,194 Posts
Thanks for the response.
Tried the Big Bore yesterday on a 29er 2.5 Aggressor tire. Wow. I actually prefer it over a Lezyne Alloy Drive, which I also tried yesterday on the same tire. Both are good but the Specialized was MUCH quicker to use, owing largely to its non screw on, retractable hose and non screw on, press on head.
The packaging that came with mine says a max of 50 PSI. I had zero trouble getting my tire to 25 PSI in no time flat (pardon the pun).
VERY impressed with the Specialized. So much so that I am returning the Lezyne for a second Specialized.
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65 Posts
This pump. I've had mine for 5 years and it's amazing. Gets your tire seated/to pressure with relatively little work
Great too hear!
Looks like, though, that there are several versions of this pump. My label looks like this:
Peace.
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Wow. That's bizarre.Great too hear!
Looks like, though, that there are several versions of this pump. My label looks like this:
View attachment 1243808
Peace.
I will say this - for as much heat as Specialized gets, they are being more than fair on this pressure rating. Maybe the 30 applies to fat tires. I bet I can easily get my 2.5 tires to 40. With very little effort. I will try tonight. I will also check my packaging and post a pic.
Here's a pic of the pump I quickly took this morning before blasting off to work. It's going to be riding alongside a Zee cage with the EMT tool attached.
We are talking about about the same pump, right?
Sorry about the sideways pic. I am on my phone and couldn't be bothered to resize it so that it posts properly on this site.
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7,194 Posts
I finally got home from work.
Here is my packaging. Bizarre.
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Anyway, 30 or 50, that pump is kick ass.
I can't seem to bond with their bikes (except maybe an SJ Evo...). But their accessories are rad AF. Cages, tools, pumps (track and mini), saddles, Bandit storage, shoes, love it all. Hell, I even have a Specialized phone case and wallet.
EDIT - one weird thing about the Big Bore is that the head won't stay on my valve if my valve is at 12:00, which is where I normally position the wheel when I pump the tires so I don't spray sealant out the valve. With the Big Bore, I have to pump with the valve at 9:00 or 3:00. Hmmm...
Here is my packaging. Bizarre.
Anyway, 30 or 50, that pump is kick ass.
I can't seem to bond with their bikes (except maybe an SJ Evo...). But their accessories are rad AF. Cages, tools, pumps (track and mini), saddles, Bandit storage, shoes, love it all. Hell, I even have a Specialized phone case and wallet.
EDIT - one weird thing about the Big Bore is that the head won't stay on my valve if my valve is at 12:00, which is where I normally position the wheel when I pump the tires so I don't spray sealant out the valve. With the Big Bore, I have to pump with the valve at 9:00 or 3:00. Hmmm...
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1,894 Posts
Bumped in to this thread, and I have to confirm this review. My wife and I have the same pumps respectively. I have experienced the exact same issue.
However, these pumps do work reliably.
When I acquired the HV one , I had a fat bike and was hoping it might make possible a tubeless bead seat in the field. Well, really not much advantage, if any.
But it's also true that some valve stems are attenuated by sealant, which restricts the ingress of air.
Still, the HV pump is easy to use. I did not get a pressure gauge version. In fact last Sunday I fixed a 27+ flat with , and it went quickly
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542 Posts
I have seated a FBF a few times in the field with the MFD-XL (no gauge). The trick is to slap the top of the tire at the same time you’re on the downstroke. Once it takes, it’ll pump up normally so long as you don’t move the tire. Slapping it compresses the air inside the tire and forces the bead outwards, and on the fill stroke it should give it enough to lightly set the bead against the rim.
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1,894 Posts
My cheapo mini pump from Dicks fills schraeder and presta and with a turn to Hl-V or to Hl-P I can fill my fat bike tires or high pressure road tires. I don't know the brand but it works pretty good and is frame mounted or I put it in my back pack. About 12" long by 1" and stores patches and glue in the handle.
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I've tried:
/rant.
- Lezyne Micro Floor Drive HV Mini Pump: moves a lot of air for its size and the mini-floor pump design makes it easier to move air fast... but good luck screwing the hose onto a presta valve with winter gloves on. Also, some genius at Lezyne thought it would be clever to put an air release valve on the hose head, so as your are attempting to screw on the hose with your bare hands at -20, you are constantly hitting that release valve and letting air OUT. To their credit, the pump did come with an extension that you screw onto the hose end, and you just push the extension onto a presta valve instead of screwing it on, but that didn't work so well either.
- Blackburn Outpost HV Mini Pump: no hose to screw on, so that's good, but you need to twist the head to lock it on the valve, and it's not easy to see what direction it needs to be twisted in, because the direction indication is a barely raised black arrow on a black pump head. The last time I tried to use it, the pump malfunctioned in the extreme cold (seals shrank?) and stopped working. The pump is somewhere in the woods now. (Note: they since redesigned the head, so you flick a lever instead of twisting the head)
- Specialized Air Tool Big Bore Pump: hose that you can apply with winter gloves on - check! Easy to use - check! But then they go and screw it up by making it comically small and short. The stroke length is way to short, virtually guaranteeing that your frantic short jerking on the pump handle will cause the hose to wiggle free. We are fatbikers, not roadies. The pump doesn't need to squeeze into the back pocket of a skintight aerodynamic lycra jersey.
/rant.
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Like I mentioned above, when I put the valve at 12:00 (which is where I normally put it to pump so I don't spray sealant all over the place), the hose easily comes off. When I put the valve at 9:00 or 3:00 instead of 12:00, the head of the hose does not pop off. Ever. It stays firmly on the valve until I am done pumping.
I actually have 2 Big Bore pumps and I can say that both are identical in this regard.
Not sure if you are pumping with the valve at 12:00 but if so, your experience may be better if you rotate your wheel so that the valve is closer to 9:00 or 3:00. Presumably gravity is the culprit here. At least for me.
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1,938 Posts
Never had an issue with my specialized pump coming off. Maybe your not pushing it on hard enough? It also has to Click on, not just push on, once its clicked its near impossible to remove.
I like the size, i put it in my XL specialized seat bag, has a little tube sleeve in it that it fits [emoji1305]. Has a second pocket for my multi tool, then i can fit a second pair of gloves and cap in it.
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I like the size, i put it in my XL specialized seat bag, has a little tube sleeve in it that it fits [emoji1305]. Has a second pocket for my multi tool, then i can fit a second pair of gloves and cap in it.
Sent from my iPhone using Tapatalk
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7,194 Posts
I'm going to try to revive this old thread. Not sure if I can with the new forum, but I'm going to try.
I spoke very highly of the Specialized Big Bore pump above. I no longer do. It krapped the bed badly on the trail last weekend. Beware...
One side of the double sided head is presta, the other schraeder. It's designed to be placed on the valve, and then pushed inwards a half inch, constricting the head around the valve until it snaps in place. The head is jammed on mine. It will no longer move back and forth. I took it apart and it's clean as a whistle inside. I can only assume it was the temperature extremes that caused this.
Looking now at a replacement pump. My LBS told me to grab whatever I want. I took a Blackburn Outpost HV Anyvalve mini pump home.
OMG can this thing move air. However, it's the size of a large billy club and just as robust. Pretty sure I could stand a remote chance against a black bear with this thing. It's huge and its heavy. I have spray, bangers and a "knife". This would complete my self defence artillery quite nicely. This thing is as much a weapon as it is a pump. Maybe more so.
Anyway, Finch posted a thread a while back that I saw krapping all over the Blackburn. Any of you guys have any experience with this pump? It won't fit on my bike. I will have to carry it. I will also carry CO2 as a backup from now on.
I spoke very highly of the Specialized Big Bore pump above. I no longer do. It krapped the bed badly on the trail last weekend. Beware...
One side of the double sided head is presta, the other schraeder. It's designed to be placed on the valve, and then pushed inwards a half inch, constricting the head around the valve until it snaps in place. The head is jammed on mine. It will no longer move back and forth. I took it apart and it's clean as a whistle inside. I can only assume it was the temperature extremes that caused this.
Looking now at a replacement pump. My LBS told me to grab whatever I want. I took a Blackburn Outpost HV Anyvalve mini pump home.
OMG can this thing move air. However, it's the size of a large billy club and just as robust. Pretty sure I could stand a remote chance against a black bear with this thing. It's huge and its heavy. I have spray, bangers and a "knife". This would complete my self defence artillery quite nicely. This thing is as much a weapon as it is a pump. Maybe more so.
Anyway, Finch posted a thread a while back that I saw krapping all over the Blackburn. Any of you guys have any experience with this pump? It won't fit on my bike. I will have to carry it. I will also carry CO2 as a backup from now on.
It is good to have options. I finally picked up an appropriate pump and gave it a trail-prep test last night when mounting my studded tires. I picked up the oft recommended Lezyne Micro Floor Drive XL. Other than more of a hunch in my back and a few more strokes I was able to seat the bead on my tubed 4 inch tire without much fanfare at all. It went surprisingly quick.
In the garage I liked the screw on head. We will see how I like it on the trail. It is small enough to fit in the main pocket of my Osprey Raptor 14 and still leave room for my puffy and other items. It will definitely not fit on the frame unless you bag it or find some custom top-tube solution, but it is not as big as I thought it would be.
So far, so good, but one "warm" garage effort is only slightly better than a show-room tire kick...
In the garage I liked the screw on head. We will see how I like it on the trail. It is small enough to fit in the main pocket of my Osprey Raptor 14 and still leave room for my puffy and other items. It will definitely not fit on the frame unless you bag it or find some custom top-tube solution, but it is not as big as I thought it would be.
So far, so good, but one "warm" garage effort is only slightly better than a show-room tire kick...
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50,076 Posts
I can't find a good pump. The screw on-heads eventually unscrew the valve core at the most inopportune time, especially in the cold when everything has shrunk a little and you have to screw it "extra tight" to get a seal. I've tried a few different pumps recently that you "push and hold" on the valve stem, but the damn valve stems flex too much and air stars escaping around the valve base. I had a syncros that was terrible, screw on and the pump head would be impossible to get out in the cold. I found (on the trail) a C-dale pump, very similar design, except doesn't use a screw on head, but a kind of "push to lock" head, which is interesting and so far, working decent, despite me buying and trying other pumps. My old mountain morph is kind of past its prime, but maybe a refresh there is worth it, even though it's huge. I found with some of the newer valve styles, like muck-off, it wasn't forming a seal around the valve, but maybe that's just due to the rubber being old an worn?
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