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-   -   Kapton Kaution (https://www.bikeforums.net/classic-vintage/1307153-kapton-kaution.html)

tiger1964 04-18-25 11:30 AM

[QUOTE=repechage;23501191 or all the spokes are too long.[/QUOTE]

Not anymore! ;)

repechage 04-18-25 12:02 PM


Originally Posted by tiger1964 (Post 23501216)
Not anymore! ;)

I will note that the shortened spokes yield a wheel where there is less adjustment, for the most part ok, in an urgent bent rim situation. One can be stuck. The way of things.

noglider 04-19-25 03:53 PM


Originally Posted by tiger1964 (Post 23501084)
A few second per spoke, stopping frequently enough to check how much I was removing, did the job and I could move on to the next spoke.

Well done. You should be good now. We can't blame protruding spokes on rim tape.

tiger1964 04-24-25 09:02 AM


Originally Posted by noglider (Post 23501961)
Well done. You should be good now. We can't blame protruding spokes on rim tape.

Hopefully you are right; I'll know in a couple of hours.

Finishing the tape, needed a tube, and I had bought a bunch of those $2.50 tube mentioned in a PSA topic here. A couple of hours later, I was outside and my wife called out, "I can hear your tire going flat". Sheesh. Opened it back up, rim tape is fine but there was a failure of the valve-to-rubber join. Really? After a couple of hours in my living room? Rather than continue with another once, I just was not comfortable as I did not want another (or multiple) failures on the road. I contacted Performance Bike, asking if anyone had experienced the same. No, they said, but if I was uncomfortable they'd refund most of what I spent. I thought that generous in the face of no evidence (I guess I could have tried to photograph the failure), PB is a good source for me. A few days later, a package of Continental tubes arrived. This AM, got one out, added a couple of PSI to round it out before mounting -- and the air rushed back out. So, t was a valve failure, it just would not close. I went to my box of leftover tubes and tires, grabbed one I figured I would not be using, swapped out the core, and it's fine. That means I should check all the other tubes in the shipment. :troll:

None of which has anything to do with the rim tape.

merziac 04-24-25 12:17 PM


Originally Posted by tiger1964 (Post 23505284)
Hopefully you are right; I'll know in a couple of hours.

Finishing the tape, needed a tube, and I had bought a bunch of those $2.50 tube mentioned in a PSA topic here. A couple of hours later, I was outside and my wife called out, "I can hear your tire going flat". Sheesh. Opened it back up, rim tape is fine but there was a failure of the valve-to-rubber join. Really? After a couple of hours in my living room? Rather than continue with another once, I just was not comfortable as I did not want another (or multiple) failures on the road. I contacted Performance Bike, asking if anyone had experienced the same. No, they said, but if I was uncomfortable they'd refund most of what I spent. I thought that generous in the face of no evidence (I guess I could have tried to photograph the failure), PB is a good source for me. A few days later, a package of Continental tubes arrived. This AM, got one out, added a couple of PSI to round it out before mounting -- and the air rushed back out. So, t was a valve failure, it just would not close. I went to my box of leftover tubes and tires, grabbed one I figured I would not be using, swapped out the core, and it's fine. That means I should check all the other tubes in the shipment. :troll:

None of which has anything to do with the rim tape.

Unfortunately the die is cast, you will continue to suffer the curse until such time the inflation gods deem you worthy again from whatever transgressions you have committed. :twitchy:

oneclick 04-25-25 05:28 AM

I've never liked any of the plastic rim tapes.
Because they have no internal reinforcing structure, they can split where they are unsupported - the spoke drillings.
Then the tube herniates into the split and soon you have a leak.
Fabric for me.

tiger1964 04-26-25 10:23 AM


Originally Posted by oneclick (Post 23505891)
I've never liked any of the plastic rim tapes. Because they have no internal reinforcing structure, they can split where they are unsupported - the spoke drillings. Then the tube herniates into the split and soon you have a leak. Fabric for me.

Thanks for pointing that out. On this bike, I got a recommendation on the Kapton because the tire was such a tight fit on this particular rim. Previously, I used Velox.

Anyway, today I am doing some minor maintenance on a few bikes, and the Palo Alto's Continental GP5000's were at the wear limit, and I had a spare pair on install. While the tires were off, I checked; indeed I had used Kapton tape -- hmmm, three years ago? The tape did bulge inward a bit but no splits, I'd estimate 25% of the way from the outer rim wall down to the top of the spoke nipple (the tape being transparent, you can actually see, and I definitely checked to protruding spoke tips while I was at it!) I left it in place, but this bears watching.

It sounds like, ideally a tape would combine the strength of a fabric product with the thinness of a film. Then again, with modern bike being tubeless these days, developing a new type of rim tape sounds unlikely... perhaps there's a product from another industry could be repurposed. Is there such a thing as carbon fiber tape?

tgot 04-26-25 01:26 PM


Originally Posted by tiger1964 (Post 23506808)
. Then again, with modern bike being tubeless these days, developing a new type of rim tape sounds unlikely... perhaps there's a product from another industry could be repurposed. Is there such a thing as carbon fiber tape?

In a prior thread someone recommended the fiber'd packing tape.

No personal experience with it.

Reynolds 04-26-25 06:08 PM

Too late, I know, but I had success grinding spokes on double wall rims with a Dremel, small conical stone at full speed.


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