Should I Buy A Pedal Wrench?

[spokewrench]

Yeah, threaded Schrader valves are nice. I've never actually had one on a tube before. (I think my dirt bike had them, but I'm not sure?)

I actually managed to thread a thin nut from a lamp shade or something onto my rubber Schrader valve once.
It was just the right diameter to bind on the rubber and thread itself down to the rim to hold the valve stem.

The motorcycle I bought in 1972 has threaded Schraders, as did the motorcycles I had before. I bought tubes with threaded Schraders for my first e-bike. When there's little or no pressure, the stem will stay put while I jam a chuck on. I'd leave the nut loose so that when I inflated, the stem would tip if the tube wasn't aligned with the hole, as you say.

With decades of experience in pneumatic fittings, Schrader of New York City designed his valve for bicycles as soon as pneumatic tires became available in France.

The symbol of British values was the Raleigh Sport on which a 10-year-old girl in 1930 pedaled 100 miles over hilly terrain one day and 100 miles home the next, without hardship. Many Frenchmen, however, yearned to be the fastest in town. This led to high-pressure tires on narrow wood rims. Depending on the quality of the chuck and the skill of the cyclist, a Schrader can lose air as the chuck is put on and removed. That could be a big problem with a narrow, high-pressure tire.

The French revived an obscure valve patented by Etienne Sclaverand before there were pneumatic tires. It would stay closed unless there was more pressure outside than inside. The narrower base didn't weaken narrow rims as much as a Schrader. They renamed it the Presta.

 

[il Munduato]

Only you won't find Schrader on premium bikes Schrader goes well with "Chinese crap"

The only purpose of PRESTA valve is to fit a thin road racing rim.
ps... Presta valves cost the same as Schrader so unless you have a real need no one buys them other than the easily fooled.

Every other tire on the planet from a wheel barrel to top of line luxury and sport auto to an airplane use Schrader because it is the superior design.
Period.

 

[Stefan Mikes]

Every other tire on the planet from a wheel barrel to top of line luxury and sport auto to an airplane use Schrader because it is the superior design.
Period.

Any good double wall bicycle rim (from road through gravel bike to MTB) in the world is made for Presta. Schrader is for automotive purposes. Perhaps because motorbikes, cars or aeroplanes are slightly bigger.

Now wonder why one e-bike is three grand and another can be had for fifteen hundred

 

[il Munduato]

Amazon.com

Or

Amazon.com

Ever wonder how they get people to pay more for things...
They make them think they are getting something special.

What does a Presta valve do better?
Can't be serviced / core replaced
Can't add tire sealant
Can't add air without special adapter not readily found when traveling

But it does make the simple feel special

 

[Stefan Mikes]

The smaller the holes in the double wall rim are the better for reducing the stress caused by the holes in the otherwise solid rim. Presta has the smallest diameter of all bike valves. That's it.

 

[il Munduato]

The smaller the holes in the double wall rim are the better for reducing the stress caused by the holes in the otherwise solid rim. Presta has the smallest diameter of all bike valves. That's it.

Yes because the rim breaking at the valve hole is a real problem.
And I guess your premium otherwise Solid rim has no spokes
You're an LBS brochure parrot.

 

[Stefan Mikes]

You're an LBS brochure parrot.

I ride US$4-5k e-bikes.
Good rims have their spoke holes reinforced.

 

[il Munduato]

I ride US$4-5k e-bikes.

They must come with some type of certificate or diploma as that's your default answer to everything you know.
So do they drop that on the floor so you have to bend over and pick it up...
Or is that only with the bill of sale?

 

[il Munduato]

Good rims have their spoke holes reinforced.

Yes because an air valve is under the same stress as a tensioned spoke

 

[Stefan Mikes]

Yes because an air valve is under the same stress as a tensioned spoke

The valve holes (two of them) have a way bigger diameter than the spoke holes, hence higher stress.

If you don't know what a double wall bike rim with reinforced spoke holes is, just think what crap you are riding

 

[PCeBiker]

oth it makes sense for the small capacity tires.

The 700C tires on my Raleigh had a small volume and they were supposed to be inflated to 120 PSI.

The tiniest leakage of air would make a Huge difference in the tire pressure, and you never leaked away the same amount of air so it was difficult to adjust for.

Using an air pressure gauge was a PITA too because you could lose a big squirt of air and have to start over.

Quick release air pump valves worked the best, and the ones that unlocked by pulling the lever up (instead of pushing down) worked better to get the valve off quick without losing so much air.

That applies to both Schrader and Presta valves but the regular domestic 27" 10-speed tires were only inflated to around 80 psi.

I actually went to Canadian Tire and bought a 27" inch tire for the Raleigh and it was too big.
I didn't know that there was a difference. I just thought 700C was the metric equivalent.
I had to go to a bike shop to get a 700C tire.

 

[il Munduato]

The valve holes (two of them) have a way bigger diameter than the spoke holes, hence higher stress.

If you don't know what a double wall bike rim with reinforced spoke holes is, just think what crap you are riding

View attachment 186439

Well I do know first hand and I also know that the only crap here is what you are spewing. A double wall rim is not exotic... so you can get over yourself.

My point is that I have never seen nor heard of any rim failing at the valve hole.
So your precieved need for Presta is imagined.

 

[il Munduato]

The 700C tires on my Raleigh had a small volume and they were supposed to be inflated to 120 PSI.

The tiniest leakage of air would make a Huge difference in the tire pressure, and you never leaked away the same amount of air so it was difficult to adjust for.

Using an air pressure gauge was a PITA too because you could lose a big squirt of air and have to start over.

Quick release air pump valves worked the best, and the ones that unlocked by pulling the lever up (instead of pushing down) worked better to get the valve off quick without losing so much air.

That applies to both Schrader and Presta valves but the regular domestic 27" 10-speed tires were only inflated to around 80 psi.

I actually went to Canadian Tire and bought a 27" inch tire for the Raleigh and it was too big.
I didn't know that there was a difference. I just thought 700C was the metric equivalent.
I had to go to a bike shop to get a 700C tire.

I'm not having an issue getting my tire to the desired pressure but if you are.. it's the air chuck you are using. Ones with a bleed button make things easy.
Alternatively... Fill the tire 1 psi heavy and then use a digital guage with a bleed button to be dead_on_balls accurate.

 

[Stefan Mikes]

So your precieved need for Presta is imagined.

The width of the rim at the inner edge is so narrow that a Schrader valve would take most of the space...
Educate yourself. I suggest starting with a purchase of a good e-bike.

 

[il Munduato]

The width of the rim at the inner edge is so narrow that a Schrader valve would take most of the space...
Educate yourself. I suggest starting with a purchase of a good e-bike.

Maybe try and educate yourself focusing on reading comprehension.
Paraphrasing my initial statement... Only necessary on thin road racing rims.
Try again

 

[Stefan Mikes]

Maybe try and educate yourself focusing on reading comprehension.
Paraphrasing my initial statement... Only necessary on thin road racing rims.
Try again

Have a look at a modern MTB rim for 2.6" tyres.

 

[teskow]

Only you won't find Schrader on premium bikes Schrader goes well with "Chinese crap"

They can't be too bad . They are on $100.00 + automobiles that go 140 MPH

 

[il Munduato]

Have a look at a modern MTB rim for 2.6" tyres.

Sure

Close enough look for you?

Now you tell me about one rim failure at the valve hole.

edit:
Now goole DTSwiss rim failure and see how many hits you get.

 

[spokewrench]

The 700C tires on my Raleigh had a small volume and they were supposed to be inflated to 120 PSI.

The tiniest leakage of air would make a Huge difference in the tire pressure, and you never leaked away the same amount of air so it was difficult to adjust for.

Using an air pressure gauge was a PITA too because you could lose a big squirt of air and have to start over.

Quick release air pump valves worked the best, and the ones that unlocked by pulling the lever up (instead of pushing down) worked better to get the valve off quick without losing so much air.

That applies to both Schrader and Presta valves but the regular domestic 27" 10-speed tires were only inflated to around 80 psi.

I guess a 26 x 1-3/8 at 60 PSI wasn't too different from a 27 at 80. In the 1950s and 1960s, chucks went on and off those Schraders without a hiss. Checking and airing car and pickup tires in the following decades, I found chucks getting hissier. It was okay on trucks and cars because the tire volume was much bigger than on bikes, and the tires were immovable so I could connect and disconnect more briskly. I guess Schrader chucks were going to hell because Schrader bicycles were fading away.

When I got an e-bike, as you say, it was very exasperating to disconnect with a hiss and realize I didn't know what pressure remained in the tire. I thought Presta valves prevented that escape. I was tempted, but then I thought of the biggest selling point of Prestas: snobbery. If they saw Prestas on my bike, they'd know I'm a snob. I don't polish my bike because people who saw my shiny bike might start calling me "that snobby polish guy."

There are still some good chucks. You hear nothing connecting one. If you hear anything disconnecting one, it's just a faint pop.

 

[Stefan Mikes]

Close enough look for you?

I can precisely see how the fat Schrader valve occupies the whole real estate.

Schrader is for lamers.