Bontrager High Flow Valve Adapter Set

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MikeD
Posts: 1042
Joined: Thu Dec 11, 2014 9:55 pm

by MikeD

https://www.trekbikes.com/us/en_US/equi ... t/p/46749/

Looks to me to be better than the Fillmore valve as you can remove it easily and use a needle type sealant injector to check and remove sealant, plus cheaper too. Comments?

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TobinHatesYou
Posts: 13029
Joined: Mon Jul 24, 2017 12:02 pm

by TobinHatesYou

Except it’s incredibly bulky? Also since it’s just an add-on to a plain Presta valve, some of the standard drawbacks remain. The valve body itself is an open cavity and sealant can pool / dry inside it.

MikeD
Posts: 1042
Joined: Thu Dec 11, 2014 9:55 pm

by MikeD

TobinHatesYou wrote:Except it’s incredibly bulky? Also since it’s just an add-on to a plain Presta valve, some of the standard drawbacks remain. The valve body itself is an open cavity and sealant can pool / dry inside it.
I've never had sealant clog the valve stem; only the Presta valve core. Sealant can get up inside the valve stem too on the Fillmore valve. The Bontrager valve adapter doesn't use the conventional Presta valve core. It has its own which has a larger surface area and, according to Bontrager, is "virtually clog free."

TobinHatesYou
Posts: 13029
Joined: Mon Jul 24, 2017 12:02 pm

by TobinHatesYou

Any time I add sealant through the valve of a Fillmore, I inflate the tire and then depress the valve to release air at max flow rate. That evacuates / aerosolizes any sealant in the valve. The Trek add-on + Presta is less likely to clog than a regular Presta, but it still has more airflow restriction than a Fillmore and an open bore. If you want overly complex and bulky, just get the new Muc-Off valve with the ball valve. It’s main trade-off is it’s not auto-open/close.

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nickf
Posts: 1476
Joined: Sat Mar 06, 2010 10:34 pm

by nickf

Dunno what the issue is. Creating a solution for a problem that does not exist. Remove pesta valve, inflate and seat tire, syringe in the sealant, re-install presta valve. 20+years riding tubeless MTB and several years riding tubeless gravel, the valve was never something I ever cursed at or has issues with.

MikeD
Posts: 1042
Joined: Thu Dec 11, 2014 9:55 pm

by MikeD

nickf wrote:Dunno what the issue is. Creating a solution for a problem that does not exist. Remove pesta valve, inflate and seat tire, syringe in the sealant, re-install presta valve. 20+years riding tubeless MTB and several years riding tubeless gravel, the valve was never something I ever cursed at or has issues with.
Valve core clogging is a recurring problem and seating a tire even with a compressor can be difficult too because the Presta core is so flow restricted. There are workarounds though, so I mostly agree with you. After I started coating my Presta cores with silicone grease, I rarely clog a valve core.

by Weenie


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