Cleveland-Cincinnati-Cleveland 1000k - June 26th

[Joshua Haley]

Initial Details for the Cleveland-Cincinnati-Cleveland 1000k have been posted on the event page! Registration is expected to open in February.
https://oh.randonneur.app/event/cleveland-cincinnati-cleveland-1000k/

[lparke...@fuse.net]

 I don't run Tubeless, but I know a lot of you do.  I DO like a bit of sealant in my tubes, though. I have found a LOT of sealed holes in tubes when I  change tires, or when the occasional puncture just won't seal.

ANYWAY, If you are looking for a good way to install the sealant, I would suggest INJECTING it.  My first try was with a spare syringe for clearing IV tubes, or injecting meds into the IV.  It was only 10cc and took a few refills, but now I have a 60cc syringe that is a lot quicker.  The tire is seated, and the syringe tip seems almost designed for use on Presta valves.   It is a pretty quick and clean operation, I think.    I am curious what others will think if they try it.  Oh, with the valve core removed, of course. . .

Larry Parker

[Jeff Loomis]

I have used a syringe with some success.  Currently I use a small Stan's bottle because I usually have one full on my bike for roadside refills if needed.  I plan to try the Staz sealant funnel soon since I recently learned about it from a Rene Herse promo email.

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[Josh Zielinski]

+1 for small Stans bottle with little red cap.  

I've bought a couple and gave the shop the contents so I could put Orange Seal Endurance sealant in them.  They aren't perfect but they are a nice tidy way to keep enough sealant for roadside needs as you mention Jeff.

For PNW rando/rando style riding (decent country roads mostly) I've found myself migrating back to tubes.  Maintaining sealant applications for a few bikes with variable riding amounts and frequencies isn't rocket science but proved too much for me to handle.  I'd be doing most of my maintenance as NEEDED which typically was roadside--not optimal.

Josh Z

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[Josh Brown]

I recently installed Reserve Wheels Fillmore valves on one of my rando bikes that gets the most winter use. It allows sealant to be topped off without valve core removal. They were pricy but fumbling with a valve core in the cold weather is not fun.

Josh in NYC 

To view this discussion visit https://groups.google.com/d/msgid/randonneurs-usa/CAFkcYGM3qdUp%3DwfoHrJmDAWn-anm6R2BC5uorofZwemhx6LWwQ%40mail.gmail.com.

[Iwan Barankay]

Sealant in tubeless tires is great for randonneuring, in my opinion. My dexterity is impaired on rides, and I am so glad I no longer have to worry about flats. I know it can fail, but it never did for me on any randonneur events, except once when I literally ran out of sealant inside my rear wheel during an SR600. However, that was my fault.

What I do want to say, though, is that especially at this time of the year, after weeks of little to no outside riding, it is best to completely redo the tubeless tire system. All kinds of things can and do go wrong when sealant is left sitting in tires without being spun. Case in point, yesterday I spent hours fixing my son's front wheel because no air was going through the valve as we tried pumping up the tire. No, it wasn't a jammed valve core or sealant clogged behind the stem; it was a buildup of a layer of corrosion inside the stem, such that the air could no longer flow past the open valve. I had to sand down the inside of the valve stem using a strip of sandpaper wrapped around a knitting needle to revive it; a new set of stems is on the way. It was a tremendous Sherlock Holmes moment for me to have figured that out, and my son promptly awarded me a medal for it with his girlfriend as bewildered witness.

In summary, make yourself a nice cup of tea, then take apart your tubeless wheel, remove all the gunk inside, retape the tire, replace the valve core (or the stem!) with a new one, and Bob's your uncle!

Iwan

@rando_iwan

[Jake Kassen]

For a while I was adding sealant to tubes, normally by using tubes with removable valve cores and just using the short piece of tubing that comes with some of the sealant bottles.

I've mostly stopped doing that because I've found it didn't always prevent flats and it would make the process of replacing the tube far more messy. I'd also find that after a year or two the sealant would harden around the valve internally and make it hard to inflate.

Jake

[lparke...@fuse.net]

That sounds like a lot of bother, to me.  I have run slime tubes for years with no problems and very few flats. Everyday commuter, touring bike, my rando/century bike, and tandem.  Now I am playing with MUC OFF, they say it doesn't dry out and will last and last.  I have never had a valve get fouled.  When I replace tires, I usually find several green dots on the tube, where the SLIME has sealed a puncture.   I do a LOT of city riding in and around Cincinnati, so I come across a lot debris. I have just started trying the MUC OFF sealant.  We shall see how that works.

YMMV

Larry

---

From: "'Iwan Barankay' via Randonneurs USA" <randonn...@googlegroups.com>
To: "Randonneurs USA" <randonn...@googlegroups.com>
Sent: Friday, January 9, 2026 3:05:34 PM
Subject: Re: [RUSA] Tire/tube Sealant

To view this discussion visit https://groups.google.com/d/msgid/randonneurs-usa/e4218f75-aea8-48fd-bcc2-dae255d6a026n%40googlegroups.com.

[jpeterd...@gmail.com]

What are you relying on these, Jake?I’m where you were with sealants, undoubtedly a bit behind, as well. Just spun my tires last night. Probably, hadn’t been done for 2-4 months. Couldn’t discern noise or odd wobbles. Sooner or later, I will need to start riding outside.

Jan Peter Dembinski

Sent from my iPhone

> On Jan 9, 2026, at 3:55 PM, Jake Kassen <li...@jkassen.org> wrote:
>
> For a while I was adding sealant to tubes, normally by using tubes with removable valve cores and just using the short piece of tubing that comes with some of the sealant bottles.

> To view this discussion visit https://groups.google.com/d/msgid/randonneurs-usa/20260109205550.2955823.qmail%40server263.com.

[Richard Stum]

Share a photo please.

~ RR

 I don't run Tubeless, but I know a lot of you do.  I DO like a bit of sealant in my tubes, though. I have found a LOT of sealed holes in tubes when I  change tires, or when the occasional puncture just won't seal.

ANYWAY, If you are looking for a good way to install the sealant, I would suggest INJECTING it.  My first try was with a spare syringe for clearing IV tubes, or injecting meds into the IV.  It was only 10cc and took a few refills, but now I have a 60cc syringe that is a lot quicker.  The tire is seated, and the syringe tip seems almost designed for use on Presta valves.   It is a pretty quick and clean operation, I think.    I am curious what others will think if they try it.  Oh, with the valve core removed, of course. . .

Larry Parker

[Lparker_0254]

That is a 20ml, 60ml, and 10ml. Also a photo of the top. The 60ml has just a plain tip, like funnel, but the diameter is about perfect. 

Sent via the Samsung Galaxy S® 6, an AT&T 4G LTE smartphone#

-------- Original message --------

From: Richard Stum <richa...@gmail.com>

Date: 1/12/26 22:53 (GMT-05:00)

To: lparke...@fuse.net

Cc: randonn...@googlegroups.com

Subject: Re: [RUSA] Tire/tube Sealant