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willardguy
Elite Nomad
Posts: 6451
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guru of offroading= harald
guru of trailriding = larry
gracias to both
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woody with a view
PITA Nomad
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Location: Looking at the Coronado Islands
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4lo and 10 psi should get any self respecting trail blazer out of 95% of trouble.
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4x4abc
Ultra Nomad
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Location: La Paz, BCS
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the purpose of 4x4 is to avoid trouble.
I had a government agency some years ago that wanted multi day recovery training for their employees.
I convinced them to divide the training into avoiding to get stuck first and then what to do after you effed up.
[Edited on 10-10-2018 by 4x4abc]
Harald Pietschmann
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4x4abc
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here is a word on pressure gauge accuracy.
A gauge that goes up to 100 psi will give you very little accuracy between 0 and 20
A gauge that goes up to 60 psi will give you very little accuracy between 0 and 10
For serious Baja travelers a 0-30 gauge is a must. Most will need 2 gauges then.
A word of caution - if your tires are at 35 psi and you use your 0-30 gauge, it will die instantly. Done that a few times.
For 5 psi at Malarrimo a precision gauge is a must.
Harald Pietschmann
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JZ
Elite Nomad
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Quote: Originally posted by 4x4abc  | here is a word on pressure gauge accuracy.
A gauge that goes up to 100 psi will give you very little accuracy between 0 and 20
A gauge that goes up to 60 psi will give you very little accuracy between 0 and 10
For serious Baja travelers a 0-30 gauge is a must. Most will need 2 gauges then.
A word of caution - if your tires are at 35 psi and you use your 0-30 gauge, it will die instantly. Done that a few times.
For 5 psi at Malarrimo a precision gauge is a must.
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A good digital gauge that goes 0 to 80 is a must. That plus the gauge on your dash board is the winning combo.
[Edited on 10-13-2018 by JZ]
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advrider
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In the rocks I run 6-10 on my jeep and it works good, with bead locks! Less air is your friend..
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PaulW
Ultra Nomad
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Excellent
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PaulW
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My latest mud venture I used 4lo and 2nd gear. Very low throttle setting and it worked. Extra throttle and all I got was tire spinning. A special
circumstance due to the deep mud.
Harald, I was running 20psi. Should I have been lower or go up to 32?
I was not about to change the pressure due to the great difficulty and horrible mess. No way to plan ahead in this case.
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4x4abc
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messy hands are cheaper than a tow truck
get out and air down!
airing up and down in a 4x4 is the most important tool/technique of all
all the "tools" you hang on the outside of your vehicle show that you are full of air
and yes, in mud I would definitely have run (or aired down to) 10 psi or less
just enough gas to get the car moving
all lockers, if you have them (no 4x4 should be without lockers)
if 10 psi still give you slipping tires go to 5 psi
2nd gear low range is old English Voodoo
it accomplishes nothing
in terms of power to the wheels it is equivalent to 1st gear high range (can vary wildly with make of truck)
but 2nd low was a better choice than 1st low
Harald Pietschmann
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DawnPatrol
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Harold;
I have a F250 SuperDuty 4x4 diesel. I have LT 265/70 's Load rated E rated to 80#
I usually run them around town at 60
How low should I go on dirt trails that are a mix of sand and dirt?
Thanks
Alan in San Diego
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JZ
Elite Nomad
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| Quote: Originally posted by DawnPatrol | Harold;
I have a F250 SuperDuty 4x4 diesel. I have LT 265/70 's Load rated E rated to 80#
I usually run them around town at 60
How low should I go on dirt trails that are a mix of sand and dirt?
Thanks
Alan in San Diego |
35. It will make a world of difference.
Put some good shocks on it too. Kings have been awesome for me. I snapped 2 of the stock shocks in half.
[Edited on 10-11-2018 by JZ]
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4x4abc
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| Quote: Originally posted by DawnPatrol | Harold;
I have a F250 SuperDuty 4x4 diesel. I have LT 265/70 's Load rated E rated to 80#
I usually run them around town at 60
How low should I go on dirt trails that are a mix of sand and dirt?
Thanks
Alan in San Diego |
every truck and every tire is different
to apply the1/3 rule (above) you need to find your true "normal" pressure
the one you run around town
run the chalk line test first, that will give you normal pressure
many examples on youtube - https://www.youtube.com/results?search_query=tire+chalk+line...
that test is done in 10 minutes (200 ft are sufficient to see the wear pattern)
you will have to establish "normal" for loaded and empty bed
for long fast freeway trips add 10 to 15 psi
for off-road follow the 1/3 rule
let us know what you find out
Harald Pietschmann
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JZ
Elite Nomad
Posts: 9225
Registered: 10-3-2003
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35
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4x4abc
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front and rear? I doubt it.
Harald Pietschmann
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DawnPatrol
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Posts: 357
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| Quote: Originally posted by 4x4abc | | Quote: Originally posted by DawnPatrol | Harold;
I have a F250 SuperDuty 4x4 diesel. I have LT 265/70 's Load rated E rated to 80#
I usually run them around town at 60
How low should I go on dirt trails that are a mix of sand and dirt?
Thanks
Alan in San Diego |
every truck and every tire is different
to apply the1/3 rule (above) you need to find your true "normal" pressure
the one you run around town
run the chalk line test first, that will give you normal pressure
many examples on youtube - https://www.youtube.com/results?search_query=tire+chalk+line...
that test is done in 10 minutes (200 ft are sufficient to see the wear pattern)
you will have to establish "normal" for loaded and empty bed
for long fast freeway trips add 10 to 15 psi
for off-road follow the 1/3 rule
let us know what you find out |
OK I will try it out and let you know. I agree my truck bounces a bunch with no load, rides like a dream when loaded (thats at the 60#)
Harald... sorry for the misspell!
[Edited on 10-11-2018 by DawnPatrol]
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bajatrailrider
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Posts: 2423
Registered: 1-24-2015
Location: Mexico
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JZ you and bikers will get a kick out of this. Years ago two of us on 87 CR500 67hp. Where riding in a group of my brothers friends we did not know
they where factory Honda riders. All riding Xr250s built so they had a hill climb type trail. S turns no run no traction steep. The two of us on
Cr500s already only had 6 psi in the tires. No worry we where thinking the little XRs are no match for our smokers. Well 6 of them went up first try.
Friend hit it 5 times could not make it all little bikes at top having good jokes about the CR500s. I tried 3 times got very tired drink all my water.
Told other Cr rider watch this I removed valve stem rear tire put it in pocket. Went up it blazing fast made the Xr riders run for cover. Other Cr
rider did same right up. We pulled out our cycle pump put valve stem back up 6psi and away we went.
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norte
Super Nomad
Posts: 1163
Registered: 10-8-2008
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| Quote: Originally posted by bajatrailrider | | JZ you and bikers will get a kick out of this. Years ago two of us on 87 CR500 67hp. Where riding in a group of my brothers friends we did not know
they where factory Honda riders. All riding Xr250s built so they had a hill climb type trail. S turns no run no traction steep. The two of us on
Cr500s already only had 6 psi in the tires. No worry we where thinking the little XRs are no match for our smokers. Well 6 of them went up first try.
Friend hit it 5 times could not make it all little bikes at top having good jokes about the CR500s. I tried 3 times got very tired drink all my water.
Told other Cr rider watch this I removed valve stem rear tire put it in pocket. Went up it blazing fast made the Xr riders run for cover. Other Cr
rider did same right up. We pulled out our cycle pump put valve stem back up 6psi and away we went. |
ANd the valve stem/tube did not pinch.
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JZ
Elite Nomad
Posts: 9225
Registered: 10-3-2003
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| Quote: Originally posted by bajatrailrider | | JZ you and bikers will get a kick out of this. Years ago two of us on 87 CR500 67hp. Where riding in a group of my brothers friends we did not know
they where factory Honda riders. All riding Xr250s built so they had a hill climb type trail. S turns no run no traction steep. The two of us on
Cr500s already only had 6 psi in the tires. No worry we where thinking the little XRs are no match for our smokers. Well 6 of them went up first try.
Friend hit it 5 times could not make it all little bikes at top having good jokes about the CR500s. I tried 3 times got very tired drink all my water.
Told other Cr rider watch this I removed valve stem rear tire put it in pocket. Went up it blazing fast made the Xr riders run for cover. Other Cr
rider did same right up. We pulled out our cycle pump put valve stem back up 6psi and away we went. |
Funny.
My best hill climb memory was at Jawbone off 395 North of Mojave.
Was riding a junker bike. Hit a super steep hill full speed, got to the lip and jumped off the bike. Landed on my feet and the bike flew another 20
yards or so into a big bush. Looked down at a group of friends and raised my hands in the air.
I might have had a beer or two before that.
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bajatrailrider
Super Nomad
Posts: 2423
Registered: 1-24-2015
Location: Mexico
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Jawbone canyon yes that's is where it happened. To answer why no tube pinch with zero air. It was only a 500ft climb and we use 4mm thick tubes. With
two rim locks on rim.
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motoged
Elite Nomad
Posts: 6481
Registered: 7-31-2006
Location: Kamloops, BC
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Mood: Gettin' Better
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For my BC trail riding/single track/cross country on my 450 I have traditionally used 11-14 psi front and 10-12 psi for rocks/roots/mud/gravel and
UHD tubes, and single rim locks front and back.
Doing multi-day rides w/camping gear (Giant Loop Coyote bag) in Baja I have traditionally gone to 16-20 front and about 15 +/- rear with Slimed UHD
tubes.
Riding a few years ago with a few Nomads, the bike guy took me into the dunes and I struggled as that type of sand has been my bane. He suggested 8
psi front and same or lower in back....and being used to avoiding pinch flats i was hesitant. I tried 10 front and 8 back and felt the
difference....and played with nothing lower than 8.
Spending a lot more time with lower psi's in the sand when I can....and have started to enjoy it.
A convert.
[Edited on 10-12-2018 by motoged]
Don't believe everything you think....
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