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New Stan’s Exocore Uses Solid Brass Core for Clog-Free, High Flow Tubeless Valve

Stan's Exocore tubeless valve
14 Comments
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If you’re just catching up, there were a lot of new valve designs this year at Sea Otter… including some we can’t even talk about yet. At Stan’s, the well-known tubeless brand has completely rethought the presta valve with an all-new design that promises to offer high flow without any clogging.

To get there, the Exocore uses a multi-piece design with a solid brass core in the middle. Since all of the sealing surfaces are external to the valve, Stan’s claims the valve is virtually clog-free. It also should work with nearly any pump – which can be an issue for certain valves.

To operate the valve, you can give the upper section a 1/4 turn to allow for a micro-bleed of air pressure. Or you can turn it wide open to allow for full airflow. Stan’s also claims that since there isn’t a regular valve core, you don’t have restrictions in flow. They claim you’ll see 4-5x the flow of a normal presta valve when using the Exocore fully open. Note that this is with the top section and the core still attached. If you need even more flow, you can remove those two like a standard presta valve. In a pinch, you can even install a normal presta core into the base.

The base of the valves are tire insert-compatible and use an elliptical tapered stopper which is pucker-free offering a full contact seal with more surface area. The valve nut also includes a captured o-ring to prevent it from vibrating loose.

Instead of a cap that has to be unthreaded, the Exocore cap simply presses on with an o-ring, and you remove it by twisting while pulling. The valve stems themselves are offered only in black, but the valve nut and caps are available in six colors which will be sold separately as a color kit.

The patent-pending valves will be sold in four lengths to fit various rim profiles and will be priced at $50 per set. The color kit price is TBD. Expect these to start shipping on July 1st.

Amazing New Syringe

It is tough to get excited about a tubeless sealant syringe, but Stan’s accomplished that with their new Tubeless Sealant Injector. Completely custom-made for Stan’s, the injector has a few details that make it better than just about anything else out there. For starters, the syringe is bigger to work with more sealant for bigger wheel sizes and will fit up to 5oz.

That larger size is also important because Stan’s says’ it’s best to fill the syringe from the top, rather than sucking sealant out of the bottle with the hose. Why? When you use the hose, you often don’t get enough of the particulate suspended in the sealant to get the most of its sealing properties. But if you go to pour sealant into the top of the syringe, how do you keep it from spilling all over?

Stan’s addressed that by adding a split valve to the hose like you’d find in a ketchup bottle. There’s also a bump stop and ridge built into the top of the syringe that allows you to insert the plunger to the stop line, without squeezing out any sealant. That means you can prep the syringe and have it fully loaded and ready to go on your workbench without spilling. When you’re ready to fill, simply press the valve fitting onto the valve, and squeeze in your sealant. You can also plug the syringe with the included red plug which doubles as a hanger.

The Tubeless Sealant Injector will sell for $15, and is available now.

notubes.com

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14 Comments
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Oliver
Oliver
22 days ago

All the features listed here are common in other brands, including the PTN / Maxalami I use. These seem to be generic at least in features. Marketing language ridiculous as usual.

Greg
Greg
22 days ago
Reply to  Oliver

I googled the brand you mentioned. If you think they’re the same, you’re misunderstanding what is going on with the new Stan’s valves.

Oliver
Oliver
22 days ago
Reply to  Greg

It was meant to say “all the features listed here for the syringes” … but edit button almost never works. Not the valves.

Chad
Chad
22 days ago

All this trickery to make a flawed design for tubeless better.
Know what’s better …. Old technology.
Schrader valves (w/ an alloy body) now since skinny rims have given up the ghost.
Maybe some presta for road, but for gravel and mnt it just makes mechanical sense.
Simple, durable, proven and inexpensive.

Aaron
Aaron
22 days ago
Reply to  Chad

Presta Valves are cool…..

Robin
Robin
22 days ago
Reply to  Chad

It’s not trickery. It’s making valves that work with tubeless. There is no objectively best solution. Best is a subjective qualification.

My Fillmore valves? They work perfectly and have never clogged. They’re the best for me. If you think Schrader valves are best for you, use ’em. There is, however, no best valve for everyone.

Rim Brake enjoyer
Rim Brake enjoyer
21 days ago
Reply to  Chad

Schrader is too reliable and not snootie patootie enough for cyclists.

ShopMechanic
ShopMechanic
20 days ago
Reply to  Chad

Agree, although it could be argued that even older valve tech is better still: Dunlop valves

Same size as Schrader for lots of flow, but without the tiny valve core.

With that said, I definitely prefer Schrader to Presta for modern mountain bikes. It’s frustrating that rim makers haven’t started drilling their rims for Schrader and including an adaptor for folks that want to use Presta for whatever reason.

Tom
Tom
22 days ago

$50 for a set of valves…is this a great time to be alive or what?

Robin
Robin
21 days ago
Reply to  Tom

Awww! Did someone make you buy something that you thought was too expensive? Do you need a tissue?

Tom
Tom
20 days ago
Reply to  Robin

says the guy who lives in his mom’s basement and complains about the price of avocado toast. But at least your sock collection makes you the belle of every ball…

Robin
Robin
19 days ago
Reply to  Tom

My mom died 3 years ago of cancer, so thanks for bringing up that memory. What an awesome human being you are.

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