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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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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"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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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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