E-MAX scooter inner tube

Looking for something? Need a special part, but can't find it online anywhere? Post what you need, maybe others will have it to sell.
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Drirr90   1 µW

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E-MAX scooter inner tube

Post by Drirr90 » Feb 04 2021 4:10am

Hi guys,

I am looking for E-max 120L inner tube. Dimensions 130/70-13 or 130/60-13.
Dimension is standard, but problem is 45 degree valve stem (from vertical).

tried to contact vectrixparts.com but they sent me standard 130/70-13 tube with vertical valve stem. Vmoto without reply :(

Thanks for any help !

David

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amberwolf   100 GW

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Re: E-MAX scooter inner tube

Post by amberwolf » Feb 04 2021 6:49am

some things that may help you find the right type of valve stem / tube; there are a number of TR-type valve stems, I don't recall the number for the 45 degree angle one but it might be tr500-(something). there are also 90-degree ones that may work if your rim/etc has space, or you may be able to use 90-degree adapters (very common) on the straight tube if there's space.

Some links that migh be useful, from a very quick search:

https://www.google.com/search?&q=45+deg ... 30%2F60-13

https://www.scootercatalog.com/vee-rubb ... -tube.html

https://www.ebay.com/itm/Vee-Rubber-130 ... 3156342465

https://www.google.com/imgres?imgurl=ht ... egUIARDRAQ

Drirr90   1 µW

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Re: E-MAX scooter inner tube

Post by Drirr90 » Feb 04 2021 8:46am

Thanks for reply. Valve shape is not problem. Please see attached image :)
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SlowCo   1 MW

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Re: E-MAX scooter inner tube

Post by SlowCo » Feb 04 2021 10:59am

Drirr90 wrote:
Feb 04 2021 8:46am
Thanks for reply. Valve shape is not problem. Please see attached image :)
Isn't it supposed to be tubeless? And is the valve stem not just a separate part that is pulled into the rim?

E-Max rear wheel.jpg
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Re: E-MAX scooter inner tube

Post by amberwolf » Feb 04 2021 7:28pm

Drirr90 wrote:
Feb 04 2021 8:46am
Thanks for reply. Valve shape is not problem. Please see attached image :)
I've seen a lot of different tubes, but none ever had a valve that was actually off-center and angled like that. The only wheels I've ever seen like that were tubeless, with a valve stem attached to the rim itself. :/ So I'm not sure where you can get one like that.

Can you post a picture of the tube you took out, including any markings printed on it or molded into it? They might lead to a source.

BTW, this thread about an Emax 120 discusses what may be this same issue:
https://endless-sphere.com/forums/viewt ... e#p1106260

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Re: E-MAX scooter inner tube

Post by Drirr90 » Feb 05 2021 2:42am

Hi guys,

Thanks for reply. I took a photo of rim. There is gap between left part of rim.

There is no way of using tubeless ... :(
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SlowCo   1 MW

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Re: E-MAX scooter inner tube

Post by SlowCo » Feb 05 2021 6:26am

Then they will have just pushed/pulled the normal situated valve stem into the hole. That will rotate the inner tube a little but probably will be fine. The inner tube that came out of the wheel is that any different than the one you received from them? Probably not. And if I see it correct the rim ring with the hole in it is detachable for easy mounting the inner and outer tire by unbolting the allen bolts on the outside of the rim. I hope you didn't use tire irons to get the tire of the rim...?
Drirr90 wrote:
Feb 05 2021 2:42am
Thanks for reply. I took a photo of rim. There is gap between left part of rim.
So just put the inner tire in the outer tire and inflate it a little. Unbolt the rim ring and slide the tubes over the hub motor positioning (pull) the valve stem between two bolt holes facing the outside. Put the outer rim rim back while putting the valve stem through the hole in the outer rim ring. Bolt the rim ring in place while pulling the valve stem to keep it poking out. Then inflate the inner tube.
But surely this must be written somewhere in a manual?

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Re: E-MAX scooter inner tube

Post by Drirr90 » Feb 05 2021 7:54am

SlowCo thanks for reply.
I found them here: https://electricavenuebike.com/store/e-max_inner_tube/ .. but .. 160USD?
Stem valve on original tube was also 45 degrees shifted on side

I can try to fit standard tube, but will it survive?
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SlowCo   1 MW

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Re: E-MAX scooter inner tube

Post by SlowCo » Feb 05 2021 5:55pm

You could try and make your own by cutting of the valve stem of the normal inner tube and vulcanizing a repair patch over the hole. Then make a new hole at the correct place to the side and vulcanize a valve stem replacement piece over it.
I would go to a tire repair shop that does big truck and farm equipment tires. They should have these replacement pieces and the material to vulcanize it.
s-l400.jpg
s-l400.jpg (9.99 KiB) Viewed 278 times

https://gemplers.com/products/tr13-tube ... valve-hole


https://www.tireinnertube.com/tire-inne ... embly.html

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