Oh, and another thing..

[Huzo]

Does anyone KNOW....
About rim sealing tape. I intend to provide an additional sealing provision over the spoke heads in my Norge wheels. 100,000 k's and 3 1/2 years have not given me any signs of air bleed past the o rings, but I'll be a bit happier on this year's Europe, if I've taken this pre emptive action. I see on the 'net that there are several types of tape dedicated to this function and the price varies a fair bit. The $$ isn't the issue, but wondered if anyone has had experience with sealing tubeless spoke rims by this method and could perhaps enlighten me ?
Thanks..
Huzo.

[Kiwi_Roy]

I seal my old Eldorado spokes with plain old general purpose silicone from GE. The thing is even if you do get a leak its a very slow one, not a sudden leak like a puncture.

Perhaps just carry half a dozen spare "O" rings, you should be able to replace one without having to remove a tire.

[Huzo]

I seal my old Eldorado spokes with plain old general purpose silicone from GE. The thing is even if you do get a leak its a very slow one, not a sudden leak like a puncture.

 you should be able to replace one without having to remove a tire.

Thanks for your interest KR.
But we may need to think that over once more 

[Guzzistajohn]

FUBAR uses some kind of special tape made for ductwork (but not duct tape)

[Huzo]

What I meant was, is that you can't replace an o ring without removing the tyre because you need to push the blind nipple up into the pressure cavity to release it from the rim.
That is after you have removed the locking collar on the nipple, then there's nothing to stop it falling into the tyre..!

[Caffeineo]

I have converted a few dirt bike wheels to tubeless with 3m 4412n tape. It is almost like a thin layer of silicone sealer with a strong adhesive on it. A lot of SuMo riders use this tape as it is easy to do and works good. More info on ADVrider https://advrider.com/f/threads/3m-4411n-sealing-tape-tubeless-conversion.1147330/

[oldbike54]

FUBAR uses some kind of special tape made for ductwork (but not duct tape)

 He paints his rims with gutter sealant on the inside . You don't expect him to be hi-tech , right ?

 Dusty

[Huzo]

He paints his rims with gutter sealant on the inside . You don't expect him to be hi-tech , right ?

 Dusty

That is not a bad idea Dusty and I would have settled for it myself..
But.
If and when you rotate a nipple to adjust a spoke, you'll bugger the seal. The tape over the top method will allow the nipple to rotate underneath the sealing tape..
(I think..!)

[Huzo]

I have converted a few dirt bike wheels to tubeless with 3m 4412n tape. It is almost like a thin layer of silicone sealer with a strong adhesive on it. A lot of SuMo riders use this tape as it is easy to do and works good. More info on ADVrider https://advrider.com/f/threads/3m-4411n-sealing-tape-tubeless-conversion.1147330/

Yhanks mate..
I'll commence my enquiries in that area..

[Sasquatch Jim]

 I prefer to buy the inflatable tube that fits inside the tire and over the rim.  It holds  pressure
and doesn't leak ( unless it is Russian ) until you run over something like a nail.

[rdbandkab]

Totally different here, but on my mountain bike rims(normally sold with tubeless ready rims)...we just tape up the holes with any semi-flexible "shiny" tape and then add a non-corrosive sealant.  I've run this set up with as much as 60lbs of air pressure...down to 30lbs of air in them.
I've wondered about how "tubeless ready" the rims(say on a RE Himilayan) would work.  Tires and spokes don't worry me as much as the part of the rim that holds the bead.

[oldbike54]

That is not a bad idea Dusty and I would have settled for it myself..
But.
If and when you rotate a nipple to adjust a spoke, you'll bugger the seal. The tape over the top method will allow the nipple to rotate underneath the sealing tape..
(I think..!)

 Just curious , with the heavy duty spokes on a modern wheel , how many times in 50,000 miles do you need to adjust the spokes, and how would the tape remain sealed to the nipples after rotating them ?

 Dusty

[rocker59]

He paints his rims with gutter sealant on the inside . You don't expect him to be hi-tech , right ?

 Dusty

LOL!

[SeanF]

I sealed the rear rim of my '14 v7 using Seal-All and Goop. There was 1 pesky spoke I couldn't get to seal 100%, so I added 2 turns of the aforementioned 3M 4211 tape (1mm thickness; 4212 is 2mm thickness) to the rim. It now loses 1 lb per week, if that.

I haven't put high miles on the setup yet.

Semi-related: I also had Woody's lace a 19" rim to the stock front hub, and seal it for tubeless tires. It opens up the number of tire choices immensely, especially dualsport tires.

[Huzo]

Just curious , with the heavy duty spokes on a modern wheel , how many times in 50,000 miles do you need to adjust the spokes, and how would the tape remain sealed to the nipples after rotating them ?

 Dusty

I did my wheels @ about 90,000 k and now has 160,000.
I have not touched the nipples (on the spokes that is !), but I suspect a check of the true would be a sensible thing to do.
The tape does not need to seal onto the nipple, but rather to the surrounding area of clean rim adjacent to the it. There is also the matter of sealing the valve. I thought to re site the valve on the "flat" section of rim between the existing valve hole and the bead, but may yet leave the valve in it's original place and seal it back down over the tape.
It needs to be remembered that there is 40 psi on one side of the tape and ambient on the other, the pressure will be forcing the tape to the rim against "centrifugal" force trying to lift it off.
Moreover.
I thought to apply a small amount of something like Vaseline to the nipples (!!!!), to allow them to rotate under the tape without "grabbing" as it were when performing adjustments in situ.
That Goop solution is a bit half arsed IMO.
The forces involved with a spinning wheel would tend to fling the stuff away from the nipples during normal operation...