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Will my Zac 19 rims convert to Tubeless?

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Will my Zac 19 rims convert to Tubeless?

Old 03-25-22, 07:45 PM
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BikingViking793 
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Will my Zac 19 rims convert to Tubeless?

I have Weinmann Zac 19 rims and 700x32 tubeless ready tires. Can I convert these rims to tubeless without issues? I've read you can convert about any rim but want to check opinions before I give it a try. This would be my first tubeless attempt. I don't want to try and fail because I never really had a chance it would work. Here are the rims for more info:
Wheel Master Weinmann Zac 19 Wheels 700c – Frugal Average Bicyclist

This is going on a Surly Cross Check btw.
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Old 03-27-22, 09:54 AM
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Hmmm…. Did I post this in the wrong forum?
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Old 03-27-22, 10:49 AM
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I suspect you will have issues setting these up tubeless. In the last photo where it shows the inner and outer dimension, you get the cross section of the interior rim extrusion - it does not have a square shelf out at the edges of the interior that are necessary to provide a native tubeless leak free tire fitting.

I've read about a company that makes air bladders that seal the inside of the rim to make any rim tubeless compatible but that falls into the "ghetto tubeless" category, So if you are willing to do the work to get these things to hold air, then I guess you could say you went tubeless "without issues.". But seeing that rim, it looks like tubes are needed to me.

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Old 03-27-22, 03:21 PM
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No, that rim is not tubeless compatible. If you try it and end up in the hospital I'll send flowers.
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Old 03-27-22, 08:16 PM
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I also doubt it. For tubeless, you want rims with a flat ledge where the beads seat (newer designs include a little hump near the rim well), and tires that fit those rims snugly, if not tightly. While you could probably find tires that fit those ZAC19 rims tightly, I wouldn't trust them to stay put if you lost air while out riding.

IMO, tubes aren't so bad. I'd stick with them until you've got a full complement of tubeless-ready parts.
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Old 03-28-22, 06:42 AM
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Originally Posted by BikingViking793 View Post
Can I convert these rims to tubeless without issues? I've read you can convert about any rim but ....
This is affectionately known as "ghetto tubeless." If the rim bed doesn't have the appropriate profile, I wouldn't do it.
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Old 03-28-22, 06:49 AM
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if you try you will need to "fill in" that lowered section of the rim with some backer rod, and I would for sure go with the fatty strippers. They end up glueing to the tire(holds better at low pressure) you can do it with the spit tube method but its not as good.
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