Sealant Question

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Richard Stum

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Aug 13, 2026, 11:03:42 PM (12 days ago) Aug 13
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Greetings Group,

Whenever I install a new tubeless tire I end up with some sealant on the floor. I typically put 2 oz. of Orange in (as instructed) as I am using 700 x 28 tires. Should I start with more, like 2.5 or 3 oz. as there is invarabiley a "given quantity" on the floor that made its way out of the tire and rim.

Best,
Rando Richard

Norman Miao

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Aug 13, 2026, 11:24:30 PM (12 days ago) Aug 13
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I seat the tire first (use soapy water to help) then pull the valve cores, turn the tire so valve is parallel to the floor and inject it into the tire. I get the least out of the tire this way.

The most I've ever gotten out of the tire is when I blew the bead after putting the sealant in first. I don't do that anymore.

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Peter LeCain

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Aug 14, 2026, 1:37:11 PM (11 days ago) Aug 14
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I tend to start with less sealant than recommend. I use Orange Seal Endurance sealant. About 1.25 oz for a Continental 5000 in a 32
I inflated the tires on the firm side and do a easy ride with lots of slow speed turns to guarantee sealant is evenly distributed. I then add another.5 -1oz of sealant and inflate to 65-70 psi riding pressure. I stick to asphalt and smooth dirt roads.

Matthew Lefthand

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Aug 14, 2026, 1:46:29 PM (11 days ago) Aug 14
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Very similar process to below. Seat the tire and add through valve, no issues. 

Now, getting tire off without a mess… I have a syringe to suck as much as I can but that is the real mess to me. 

On Aug 13, 2026, at 9:24 PM, Norman Miao <norm...@gmail.com> wrote:



Richard Stum

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Aug 16, 2026, 7:30:54 PM (9 days ago) Aug 16
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Thanks all. 

Norman, you start with soapy water and then do you rinse it out before adding sealant? 

Matthew...BIG CONGRATS on your recent world record (s). Did I see your Strava upload correctly? 30.5 MPH for 200 miles? Ouch.

Norman Miao

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Aug 16, 2026, 9:49:23 PM (9 days ago) Aug 16
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It’s a pretty small amount of soapy water just lightly applied to the bead and sidewall. None in the tire itself. If I feel like a lot got in I’ll sometimes rinse it!

jafr3

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Aug 16, 2026, 9:49:37 PM (9 days ago) Aug 16
to Utah Randonneuring
I don’t have an air compressor. I seat the tire first using an Airshot. Then I put the sealant in and use the Airshot again to inflate the tire. Put enough air pressure in the tire to make it seat on the rim. Make sure you can take the Valve Core in and out of the Valve to put the air, sealant, air into the tire. Then you are good to go.

Matthew Lefthand

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Aug 19, 2026, 3:10:41 PM (6 days ago) Aug 19
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Richard, yes it was 30.11 for 200mph officially. Flying!

Best,

Matthew

Richard Stum

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Aug 19, 2026, 3:53:37 PM (6 days ago) Aug 19
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I noticed that the Global Cycling Network (GCN) in the UK picked this up as a story, and they were blown away! I am sure there are many other sources sharing this phenomenal time as well.

Best,
RR

Matthew Lefthand

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Aug 19, 2026, 4:19:02 PM (6 days ago) Aug 19
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Yes, it’s been fun to have people pick it up and react to it. I’ll be on Good Morning Utah at 8:45am next Tuesday.

Best,

Matthew

Steve Wilson

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Aug 19, 2026, 4:49:00 PM (6 days ago) Aug 19
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Amazing accomplishment, Matthew! Having grown up in the San Luis Valley, not only was I excited to follow your attempt, but also I know the exact location of your successful World Record ride! 

Congrats! Excited to see what's next. 

Steve

On Aug 19, 2026, at 2:19 PM, Matthew Lefthand <matthew....@gmail.com> wrote:

Yes, it’s been fun to have people pick it up and react to it. I’ll be on Good Morning Utah at 8:45am next Tuesday.

Matthew Lefthand

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Aug 19, 2026, 5:06:16 PM (6 days ago) Aug 19
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Steve, 

Very cool that you had a couple ties to it! 

That value is a pretty interesting place as far as cycling goes. RAAM and the Tour Divide both cross through there.

Best,

Matthew

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