Non vented wheels/tires....

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I’ve tested sealed vs vented extensively in the past and have to disagree.
I run all of my off-road tires completely sealed and as far as I know still hold the record for fastest pass on backflip tires, partly due to them being sealed. Venting them in any form introduces debris inside the tire creating a far greater negative impact than running them sealed. So far the only perceived negative impact to running sealed is the profile of the tire as it balloons which to me has no negative impact at all on performance or tire durability.

There is zero benefit to running vented whereas there are major benefits to running sealed.
What speed did you reach on the Backflips?
 
Interesting thoughts. When I first vented I expected tears near the holes. That did not happen. I also expected more imbalances due to dirt getting into tires. Also did not happen. So I assume very little gets inside. Someone with old worn out tires, please cut open, weigh the dirt / show photo and post here please.
 
73mph - Notorious on full-size backflips
 
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