|
|
Thread Tools | Display Modes |
#11
|
|||
|
|||
Need a new Schrader pump head
On Feb 15, 6:03*pm, AMuzi wrote:
BCDrums wrote: I have a '70s MDI floor pump that I use to keep the tires on the family cars topped up, and to do our kid bikes with pressures into the 60 psi range. The head has failed after a mere 35 years. I can get a Planet Bike head shipped for $6 shipped, or a Topeak Twinhead with hose for $20. I worry that I'll have trouble fitting the Planet Bike head onto the car tires, but I like the price. Does anyone want to say that the Twinhead is fantastic and worth the money? ...... Topeak's set includes a good quality hose, dual head and all the fittings to easily install them on just about any pump. * If you want assurance that this will be a quick job with no intervening errand to the hardware store, go Topeak. The Planet 1012 head is OK, may or may not readily fit your hose but if you're handy it's cheap. Planet 1012 hose/head set should be about 2/3 the cost of a Topeak and will fit with a 95c hose clamp. Fitting your car tire valves shouldn't be an issue unless your wheel covers are too deep for a good grasp. SV extenders may be a solution. -- Andrew Muzi * www.yellowjersey.org/ * Open every day since 1 April, 1971 Followup: I ordered the Planet Bike pump head for $6 shipped. It fit onto the pump hose, and it has a screw-on collar that works as a hose clamp but is neater. The thumblock is a bit stiff, and the Schrader connection is snug, but both may loosen up with some use. Filled some kid bike tires and topped up the car tires. Success on the cheap! BC pumped |
Ads |
#12
|
|||
|
|||
Need a new Schrader pump head
AMuzi wrote:
BCDrums wrote: My Presta pump, for the record, is an equally vintage Silca. I can hear it falling over right now. Both pumps are first rate products but the Silca has better small parts support as Medai closed long ago. Is there any new equivalent to the Medai pump? What is the pump of first resort at Yellow Jersey? Every shop I worked in during the early '90s used Medai pumps which were superficially crappy but extremely reliable in the long run. Conversely, all the current production pumps I've used other than Silca are either troublesome to operate, failure-prone, or both. I've blown up a Planet Bike, a Pedro's, and a Park pump in pretty short order. The Lezyne floor pump at my shop seems built to last, but the fiddly air chuck makes me avoid using it. It would be fine for home use, but it's not a first-rate shop pump. Chalo |
#13
|
|||
|
|||
Need a new Schrader pump head
BCDrums wrote:
My Presta pump, for the record, is an equally vintage Silca. I can hear it falling over right now. AMuzi wrote: Both pumps are first rate products but the Silca has better small parts support as Medai closed long ago. Chalo wrote: Is there any new equivalent to the Medai pump? What is the pump of first resort at Yellow Jersey? Every shop I worked in during the early '90s used Medai pumps which were superficially crappy but extremely reliable in the long run. Conversely, all the current production pumps I've used other than Silca are either troublesome to operate, failure-prone, or both. I've blown up a Planet Bike, a Pedro's, and a Park pump in pretty short order. The Lezyne floor pump at my shop seems built to last, but the fiddly air chuck makes me avoid using it. It would be fine for home use, but it's not a first-rate shop pump. We still sell both Silca floor models and currently the Redline steel pump w/gauge for our not-Silca customers. (the intermediate product is an Asian steel pump with Silca brass head.) I put new hoses and/or heads on ancient MDI pumps a couple dozen times a year. They are nearly Silca in their durability, only the locking SV head wearing out usually. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#14
|
|||
|
|||
Need a new Schrader pump head
AMuzi wrote:
I put new hoses and/or heads on ancient MDI pumps a couple dozen times a year. They are nearly Silca in their durability, only the locking SV head wearing out usually. That's what I 'member about them. Silca pumps are great except for one thing-- the Schräder valve chuck is terrible, even worse than the fussy one on the Lezyne floor pump. What's the best option for a Schräder chuck retrofit? Chalo |
#15
|
|||
|
|||
Need a new Schrader pump head
On Feb 21, 8:37*pm, Chalo wrote:
AMuzi wrote: I put new hoses and/or heads on ancient MDI pumps a couple dozen times a year. They are nearly Silca in their durability, only the locking SV head wearing out usually. That's what I 'member about them. Silca pumps are great except for one thing-- the Schräder valve chuck is terrible, even worse than the fussy one on the Lezyne floor pump. What's the best option for a Schräder chuck retrofit? Chalo design one - go into production with local shop - buy rancho on Kaliaua |
#16
|
|||
|
|||
Need a new Schrader pump head
On Sunday, February 21, 2010 1:48:44 PM UTC-5, BCDrums wrote:
On Feb 15, 6:03*pm, AMuzi wrote: BCDrums wrote: I have a '70s MDI floor pump that I use to keep the tires on the family cars topped up, and to do our kid bikes with pressures into the 60 psi range. The head has failed after a mere 35 years. I can get a Planet Bike head shipped for $6 shipped, or a Topeak Twinhead with hose for $20. I worry that I'll have trouble fitting the Planet Bike head onto the car tires, but I like the price. Does anyone want to say that the Twinhead is fantastic and worth the money? ..... Topeak's set includes a good quality hose, dual head and all the fittings to easily install them on just about any pump. * If you want assurance that this will be a quick job with no intervening errand to the hardware store, go Topeak. The Planet 1012 head is OK, may or may not readily fit your hose but if you're handy it's cheap. Planet 1012 hose/head set should be about 2/3 the cost of a Topeak and will fit with a 95c hose clamp. Fitting your car tire valves shouldn't be an issue unless your wheel covers are too deep for a good grasp. SV extenders may be a solution. -- Andrew Muzi * www.yellowjersey.org/ * Open every day since 1 April, 1971 Followup: I ordered the Planet Bike pump head for $6 shipped. It fit onto the pump hose, and it has a screw-on collar that works as a hose clamp but is neater. The thumblock is a bit stiff, and the Schrader connection is snug, but both may loosen up with some use. Filled some kid bike tires and topped up the car tires. Success on the cheap! BC pumped |
#17
|
|||
|
|||
Need a new Schrader pump head
Followup: I ordered the Planet Bike pump head for $6 shipped. It fit onto the pump hose, and it has a screw-on collar that works as a hose clamp but is neater. The thumblock is a bit stiff, and the Schrader connection is snug, but both may loosen up with some use. Filled some kid bike tires and topped up the car tires. Success on the cheap! BC pumped Welcome back to this exciting thread on Schrader pump heads. After less than 2 years, the $6 head from Planet Bike has stopped gripping the valves, and now I'm ready to up the ante. Has anyone tried the Prestacycle Quick-Clip Schrader head? Shown he http://www.universalcycles.com/shopp...&category=4093 It looks good. Has anyone tried it? Thanks. BC |
#18
|
|||
|
|||
Need a new Schrader pump head
BCDrums wrote:
Followup: I ordered the Planet Bike pump head for $6 shipped. It fit onto the pump hose, and it has a screw-on collar that works as a hose clamp but is neater. The thumblock is a bit stiff, and the Schrader connection is snug, but both may loosen up with some use. Filled some kid bike tires and topped up the car tires. Success on the cheap! BC pumped Welcome back to this exciting thread on Schrader pump heads. After less than 2 years, the $6 head from Planet Bike has stopped gripping the valves, and now I'm ready to up the ante. Has anyone tried the Prestacycle Quick-Clip Schrader head? Shown he http://www.universalcycles.com/shopp...&category=4093 It looks good. Has anyone tried it? I haven't tried that one, but it looks suspicious to me. Here's why. Most heads seem to grip the valve by axially compressing a thick rubber tube, causing that tube to bulge inward and grip the end of the Schrader (or Presta) valve. The pump head you've shown doesn't seem to have room for such a mechanism. An alternative mechanism on one very cheap pump I once bought had a thin piece of hard steel strip with a semi-circular cutout. The head's clamp mechanism slid that semicircle laterally, where it was supposed to bite into a single thread on the Schrader valve, and bite from only one side. It held very poorly. I'm thinking the head you linked may have that same sort of mechanism. If so, I'd avoid it, unless others give it good reviews. -- - Frank Krygowski |
#19
|
|||
|
|||
Need a new Schrader pump head
On Wed, 3 Oct 2012 06:58:40 -0700 (PDT), BCDrums
wrote: http://www.universalcycles.com/shopp...&category=4093 It looks good. Has anyone tried it? That's what I have on my shop and my office air compressors. That air chuck wasn't made for bicycles, but rather for automobile tires. It works acceptably on Schrader stems for automobile tire pressures (25-35 PSI) and works very badly for anything much higher pressure such as bicycle tire pressures (45-100 PSI). The problem is that the retention mechanism consists of a thin piece of spring steel that hits the stem threads. There's no downward pressure to seal the valve area. It is very sensitive to mechanical alignment. The only reason it works for me is that my air compressor can afford to leak and spew surplus air with impunity. However, with a bicycle pump, every stroke costs you effort making bad seals and leaks a real problem. Note that it includes a Presta adapter. That's required because the common thread-on Presta stem adapter doesn't work. http://www.rocketenterprises.net/catalog/$%28KGrHqUOKjkE4sidQvVBBOPz62eo6w~~_1_1684_1.JPG There's no threaded area on the Presta stem adapter for this air chuck to grip. So, if you're into low pressure tires and use an air compressor, it's good enough. However, if you're into high pressure tires, and use a hand pump, I suggest you find something more suitable with a better seal and locking mechanism. Incidentally, if you do use an air compressor, you can get it treaded for a 1/4" NTP fitting. http://www.harborfreight.com/tire-chuck-with-lock-on-lever-68267.html Also note the locking mechanism in the photo. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#20
|
|||
|
|||
Need a new Schrader pump head
On Wednesday, October 3, 2012 12:20:31 PM UTC-4, Jeff Liebermann wrote:
Incidentally, if you do use an air compressor, you can get it treaded for a 1/4" NTP fitting. http://www.harborfreight.com/tire-chuck-with-lock-on-lever-68267.html Also note the locking mechanism in the photo. Thank for the info, Jeff. I looked at the item on Harbor Freight- it has 13 reviews, all of them one star! BC |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Dual valve floor pump only pushes air out the Schrader valve hole | Brad Ford | Techniques | 19 | November 25th 18 04:15 AM |
brompton pump for schrader valves? | bugbear | UK | 7 | July 24th 07 08:38 PM |
Which floor pump head? | landotter | Techniques | 28 | March 2nd 07 08:52 PM |
Puncture/schrader valve/pump question | Premal P. Vora | Techniques | 5 | October 17th 06 06:46 PM |
frame pump does not work on schrader valve | wle | Techniques | 5 | November 5th 03 01:32 PM |