What tube with long valve do you use for e-bike double walled rim?

[alpharalpha]

This was my first experience with a double walled rim so had put a regular schrader tube in it, but now that I've snapped a spoke seems like a good time to switch out the tube for one with a longer valve, but the only ones I'm finding are this tube Kenda 700X35-43 48Mm Long Schrader https://www.amazon.com/dp/B008HKG1R...olid=2JG7FGDTGJJJJ&psc=0&ref_=lv_ov_lig_dp_it
And Sunlite Bicycle Tube 48mm Schrader Valve 700 x 35-43 Tube Bike https://www.ebay.com/itm/Sunlite-B...764?_trksid=p2349526.m4383.l4275.c10#viTabs_0
Any better choices out there?
Thanks.

 

[wturber]

I just use valve extensions that you can pick up for a few bucks at an auto parts store.

 

[MadRhino]

I can’t tell about 700c but since there are many deep rims in that size it should be easy to find long stems.

In DH sizes, I use those tubes with Shreader brass stem since they have a nut to lock them in place on the rim. Locking the valve stem on the rim does make easy inflating, and metal stem does reduce the occurences of stem cut or tear by tire slipping on rim in acceleration.

 

[alpharalpha]

I can’t tell about 700c but since there are many deep rims in that size it should be easy to find long stems.

In DH sizes, I use those tubes with Shreader brass stem since they have a nut to lock them in place on the rim. Locking the valve stem on the rim does make easy inflating, and metal stem does reduce the occurences of stem cut or tear by tire slipping on rim in acceleration.

What does DH stand for? I like the stems with a nut that locks them in place. I forgot about them as it's been awhile since I happened to get tubes with them. Can you tell me a brand name to help me maybe track them down? Thanks.

(And I bought some slime brand extenders, but they don't work too well.)

 

[aroundqube]

DH is a down hill. The Schraeder valve that is metal w/threads & nut are known in Europe as Woods Valves. More info here; https://www.schwalbetires.com/bike_tires/tubes/finder . Also check out the technology and information links there.

 

[Chalo]

[...]the only ones I'm finding are this tube Kenda 700X35-43 48Mm Long Schrader https://www.amazon.com/dp/B008HKG1R...olid=2JG7FGDTGJJJJ&psc=0&ref_=lv_ov_lig_dp_it
And Sunlite Bicycle Tube 48mm Schrader Valve 700 x 35-43 Tube Bike https://www.ebay.com/itm/Sunlite-B...764?_trksid=p2349526.m4383.l4275.c10#viTabs_0
Any better choices out there?

There are 48mm Schrader valve tubes in most sizes these days. Note that current practice is to label tubes a larger size than they are, so if you use a tire in the 35-42mm size range, you'll get a better fit from a 40-45mm tube or even a 50-52mm tube. Undersized tubes are lighter and easier to tuck in, but they lose pressure faster and are easier to puncture when they're stretched to conform to the tire.

 

[MadRhino]

What does DH stand for? I like the stems with a nut that locks them in place. I forgot about them as it's been awhile since I happened to get tubes with them. Can you tell me a brand name to help me maybe track them down? Thanks.

(And I bought some slime brand extenders, but they don't work too well.)

On Downhill bikes we use big tires, and metal stems are more common on big size tubes. Stems are also commonly longer on DH tubes since deep rims had been used for a while. I use the tubes that are available locally when I need one, and choose those that are the tickest with Woods valve. Nokian, Kenda, Michelin, and many other are making thick DH tubes with Woods valves. Yet that might become obsolete soon, with DH tires and rims going to tubeless standard pretty quick.

 

[alpharalpha]

I had heard that larger size tube would be prone to pinching so I've never done it, but if you say it's better I'll try it. Guess I'd be looking at 29er tubes in those larger sizes? I have the Schwalbe Marathon Plus HS 348 (700x38c) https://www.amazon.com/Schwalbe-Marathon-Plus-Road-Bike/dp/B000PZT8LM?th=1&psc=1 Would a 700X47-58 be too large?

 

[Chalo]

I had heard that larger size tube would be prone to pinching so I've never done it, but if you say it's better I'll try it. Guess I'd be looking at 29er tubes in those larger sizes? I have the Schwalbe Marathon Plus HS 348 (700x38c) https://www.amazon.com/Schwalbe-Marathon-Plus-Road-Bike/dp/B000PZT8LM?th=1&psc=1 Would a 700X47-58 be too large?

Marathon Plus is kind of a special case. The anti-puncture belt is so thick that it takes up a significant part of the volume that would otherwise be filled with tube. So for that tire, I'd consider a 700x40-45 tube to be the maximum practical size. I think its ISO designation is 622-40 even though its labeled size is 700x38.

When using a tube that's close to the size of the tire, make sure it contains some air, but it's not inflated enough to be stretched before you tuck it in. If the tube is either deflated until flat, or inflated enough to hold the tire against both sides of the rim, you run the risk of pinching it while snapping the tire into place.