Trials tire pressure

The short answer is no. Pump your tire up untill the side
wall stops folding over. Ideally you want your tire as stiff
as possible such that you can get spring out of it. Just
play around with it unitill you find something you like and
your tire doesnt bottom out or fold over on.

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Checkernuts said:

*Ideally you want your tire as stiff as possible such that
you can get spring out of it.*

If you can't get any spring out of it, then you can't hop as
high. You need to use the compression of the tire to your
advantage, to spring yourself up.

I advise having the PSI somewhere between 22 and 28. That's
what works best for me.

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I change it depending on the kind of stuff I'm doing. Low is
good for soft landings and hops, but then you'll hear evil
CLANG noises doing drops and gaps get weird when the tyre
starts folding on take-off or landing. High feels rather
solid so isn't as smooth or bouncy, but is a more solid
platform for gaps and drops.

Of course, a lot of it also depends on whether I've
remembered to inflate it before setting off...

On the whole it wavers around 25psi or so.

Phil

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As I've mentioned before, you can't give out tire pressure
specs without including your tire size, and your weight. If
you have an "entry level" Trials uni it might have a much
smaller tire, and need much higher pressure. Also your
weight is a big factor.

For most things, the object is to keep it as soft as
possible without your rim hitting the ground. You'll have to
determine how much air that is depending on how hard you're
landing and doing other things. You also want to avoid the
tire folding over on side hops. You may need to add some air
to get good spring action for jumps or high hops.

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I ride at about 22 that is best all round as the name says i
am thinuniking so i don't weigh much!just 1 psi can make
alot of difference Ben

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I run between 15 and 20. maybe 25 if i am gapping some
really skinny rails or sometimes doing natural trials.

john

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Thanks for posting this question. I obviously do not run
enough air in my Trials tire, as it folds over often on side
hops. (at least 10 times yesterday).

I will add air to it tonight. Then I will be the highly
inflated --chirokid-- 🙂

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"Other than that, the best maintenance is to keep riding it as this
helps to keep the eccentric nut on the saddle in optimal condition."
quote by Mikefule

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Just as I was ready to take my 29er on a ride last evening,
my family arrived at home. I asked my 9 year old daughter if
she would like to go for a uni ride with me and she quickly
went and put on her tennis shoes. Since she rides on a 16"
Jugglebug (which I added a Muni tire to), I decided to put
up my 29er and take the 20" Summit instead.

We had a great ride together. She has really been practicing
hopping, and last night she put some of it to the test. She
would side hop up onto speed bumps, the off the other side.
I was so proud of her.

As a way to keep this on topic, just last week I had to
patch a hole in the Jugglebugs tube because she was hopping
with to little of air in the tire. When I got the tube off,
it was all chewed up, so make sure to run enough air in your
tires to prevent this. --chirokid--

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helps to keep the eccentric nut on the saddle in optimal condition."
quote by Mikefule

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chirokid said:

*just last week I had to patch a hole in the Jugglebugs
tube because she was hopping with to little of air in the
tire. When I got the tube off, it was all chewed up...*

That's a good point for all you parents and coaches out
there. Keep an eye on the tires under your little charges.
Kids are about as aware of tire pressure as they are aware
of how dirty they are (in other words, oblivious). I notice
a too-low tire instantly. It amazes me how kids, even near-
beginners, can jump on and ride all over the place with the
rim basically on the ground.

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Here's what I like:

*Rail riding* - Tyre pressure as low as possible without
hitting the rim on drops up to about 1.5m (I don't like
riding rails that are higher if they're skinny ones and the
low pressure only applies to skinny ones for
me).

*Gapping and high hopping* - I like to not be able to feel
the tyre folding. When I go for sidehops that would cause it
to fold more (like about 1.7m-ish) I still take off with the
wheel just a bit past perpendicular to the direction I'm
going. Although this is mainly because I suck at hopping
forwards I think it's also because I like to use the
sideways spring of the tyre. I think if you're hopping to
the side you can get away with a higher pressure and still
get good spring out of it.

*Narrow surface gapping* - I like to have the tyre
completely fold around the surface (I'm talking about
surfaces like 20-60mm wide) but never fully hit the rim.
I find getting the right pressure for these sorts of
gaps tricky.

*Limit-pushing / scary drops* - Tyre pressure so that the
rim doesn't hit the ground, then a little bit more is my
preference.

Andrew

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