Wood, Nicholas C

A good place to start with pressure is weight / 7. That number -1 in front, +1 in back, which reasonably coincides with Jeff's numbers below. Obviously weight extremes (like his son below), trail conditions and riding style need to be considered but it's a good starting point.

Big canisters are also propane, be careful, can't imagine how you could ever get yourself in trouble with one of these but it is worth noting.

Nick

-----Original Message-----
From: obra-bounces@list.obra.org [mailto:obra-bounces@list.obra.org] On Behalf Of Jeff Parker
Sent: Friday, February 22, 2013 11:00 AM
To: obra@list.obra.org
Subject: [OBRA Chat] Trail kit for tubeless MTB?

All of the above for trail riding. For racing, I forgo the pump to save weight. You still need a spare tube for tubeless in case you punch a big enough hole that the sealant wont seal it up. That's probably anything over a couple mm's.
The big canister allows you to inflate a 29er and still have a little extra to top off if it's a slow leaker. That's the thing with tubeless, more often than not, if the tire has a slow leak, you can stop, put a little air in it, and keep riding and the leak will stop within a few minutes.
If you've never ridden tubeless before, make sure you get your pressure dialed in before you race the first time. The pressure required is likely much lower than what you rode with tubes - somewhere in the low to upper twentys most likely. My 80lb son rides at about 18psi, I ride about 22-27 at 155lbs. This is the real advantage of tubeless. Enjoy your new setup!

Jeff
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Rick Johnson

And don't forget about plugging larger holes when running tubeless, keep
a small scrap of tube in your kit. Use bit of it to plug up the hole by
poking it partway in with a small blunt object (Allen wrench for
instance). That works especially good for sidewall holes the flex enough
that the sealer particles keep spitting out.

Rick Johnson
Bend Oregon

* * *

Political Parallelism, part 2

Some say "The 2nd Amendment only applies to muskets since the founders could never appreciate the danger of modern firearms".

The 1st Amendment was written with quill pens and at the time printing was done on mechanical print presses.
Therefore by the same logic it's obvious the founders never intended to protect the rights of people to communicate using digital media, the internet, TV, recorded sound, photography or movies.

On 2/22/2013 11:00 AM, Jeff Parker wrote:
> All of the above for trail riding. For racing, I forgo the pump to save weight. You still need a spare tube for tubeless in case you punch a big enough hole that the sealant wont seal it up. That's probably anything over a couple mm's.
> The big canister allows you to inflate a 29er and still have a little extra to top off if it's a slow leaker. That's the thing with tubeless, more often than not, if the tire has a slow leak, you can stop, put a little air in it, and keep riding and the leak will stop within a few minutes.
> If you've never ridden tubeless before, make sure you get your pressure dialed in before you race the first time. The pressure required is likely much lower than what you rode with tubes - somewhere in the low to upper twentys most likely. My 80lb son rides at about 18psi, I ride about 22-27 at 155lbs. This is the real advantage of tubeless. Enjoy your new setup!
>
> Jeff
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> OBRA mailing list
> obra@list.obra.org
> http://list.obra.org/mailman/listinfo/obra
> Unsubscribe: obra-unsubscribe@list.obra.org

Jeff Parker

Forgot to add, I wrap my tube in a small rag so I have something to wipe the Stans off with when I put the tube in. That stuff gets everywhere!

Jeff Parker

All of the above for trail riding. For racing, I forgo the pump to save weight. You still need a spare tube for tubeless in case you punch a big enough hole that the sealant wont seal it up. That's probably anything over a couple mm's.
The big canister allows you to inflate a 29er and still have a little extra to top off if it's a slow leaker. That's the thing with tubeless, more often than not, if the tire has a slow leak, you can stop, put a little air in it, and keep riding and the leak will stop within a few minutes.
If you've never ridden tubeless before, make sure you get your pressure dialed in before you race the first time. The pressure required is likely much lower than what you rode with tubes - somewhere in the low to upper twentys most likely. My 80lb son rides at about 18psi, I ride about 22-27 at 155lbs. This is the real advantage of tubeless. Enjoy your new setup!

Jeff

Paul Kelly

I've upgraded to a tubeless wheelset for the upcoming XC season, but need some guidance from the combined wisdom of OBRA.

When riding tubeless, what is in your under-the-saddle tool kit? Do you bring a tube and pump just in case? Tire boot? More sealant? What's with those shaving-cream-can-looking canisters I see strapped to some seatposts at the starting line?

Thanks in advance for saving me from a trailside stranding!

PHK