Flat Spot Hell on Rockers - Pirate4x4.Com : 4x4 and Off-Road Forum

toyjeep73 · 04-10-2010, 10:23 AM

So I was really stupid and let my 42x15x16.5 Rockers on 8-bolt H1's sit at 0-5 lb of pressure for probably a month back in December. They flat spotted so bad you could see it and they will not go away. I have not been able to drive it on road since then (and not had a chance for off road) and am starting to get extremely irritated. They are so bad that when the flat spots are in sync, you feel like you are on a pogo stick, and when they get out of sync, you feel like the rig is about flip off the road. I have not gotten it above about 20 mph cause I feel like I'm going to die.

So far I have tried driving it around the neighborhood for about 10-20 min each trip at 10 psi, 20 psi, and finally 25 psi. I let it sit on jackstands at 25 psi for about 2 weeks just recently, and they WILL NOT GO AWAY!

What can I do beside replace them?!?!?!?

Wilson · 04-11-2010, 01:16 PM

You're going to have to drive them to get the tires to heat up and round back into shape.

The Rockslut · 04-11-2010, 01:24 PM

I would air them up to the posted max psi and drive them around the hood.

HAPPYJOHN · 04-11-2010, 02:14 PM

Quote:

Originally Posted by The Rockslut

I would air them up to the posted max psi and drive them around the hood.

This is good advice, and next time you park, max out the air pressure.

Johno33772 · 04-11-2010, 05:51 PM

Air them up & ride em on the road, they will go round as soon as they warm up a little, they wiil be just fine. Don't leave sitting deflated, leave 15-20' of air in them

Dookey · 04-11-2010, 06:05 PM

You're fawked. Sell them to me cheap.

trusted_expert · 04-12-2010, 06:10 PM

tires build heat faster at a lower psi so id drive on them at a lower psi untill they begin to warm up

jam0o0 · 04-12-2010, 07:10 PM

tires heat better when you can drive on them. max the air and go find a freeway. lots of heavy brakeing and accelerating on the way there.

if you can't get above 20 then you aren't gunna ever get them back.

The Rockslut · 04-12-2010, 10:54 PM

Quote:

Originally Posted by trusted_expert

tires build heat faster at a lower psi so id drive on them at a lower psi untill they begin to warm up

Tires build heat at low psi and higher speeds. He already tried to warm them up at low speeds. He needs max psi to force the tire to be as round as it can and the get the heat built up.

SwampWalker3 · 04-13-2010, 05:26 AM

Should trade me your headache for some new 38.5 boggers.

guidolyons · 04-13-2010, 09:59 AM

Yep, inflate and drive around get them warm so they get round again. Store on jackstands or keep them inflated to keep them round.

mudskipper4x4 · 04-13-2010, 03:46 PM

This reminds me.... I need to air up mine from 5psi, Thanks!

PpaZmrf · 04-13-2010, 03:58 PM

X2 Fawk! Haha, goin to the yard now to air up and jack up!

WHATAHEEP · 04-14-2010, 06:37 PM

wouldn't driving them at low pressure get them hot faster

HAPPYJOHN · 04-14-2010, 08:32 PM

Quote:

Originally Posted by WHATAHEEP

wouldn't driving them at low pressure get them hot faster

Miss a line??

Quote:

Originally Posted by toyjeep73

So I was really stupid and let my 42x15x16.5 Rockers on 8-bolt H1's sit at 0-5 lb of pressure for probably a month back in December. They flat spotted so bad you could see it and they will not go away. I have not been able to drive it on road since then (and not had a chance for off road) and am starting to get extremely irritated. They are so bad that when the flat spots are in sync, you feel like you are on a pogo stick, and when they get out of sync, you feel like the rig is about flip off the road. I have not gotten it above about 20 mph cause I feel like I'm going to die.

So far I have tried driving it around the neighborhood for about 10-20 min each trip at 10 psi, 20 psi, and finally 25 psi. I let it sit on jackstands at 25 psi for about 2 weeks just recently, and they WILL NOT GO AWAY!

What can I do beside replace them?!?!?!?

Forumboarder1 · 04-15-2010, 07:31 PM

I bought some 37 inch super swamprs that sat for a year or so and ther was multiple flat spots. but driving it for about a week seemed to get them round again

it was not a very fun week though!!!

toyjeep73 · 04-20-2010, 04:17 AM

Did a 40 mile trail ride this past weekend, by the end of it I could get up to speed and all seems to be better. I wil not be leaving them for looooong periods of time with loooow pressure again.

Loftis61 · 04-20-2010, 10:26 AM

Good to know its sorting itself out. Thanks for checking back in and letting us know.

04-10-2010, 10:23 AM	#1 (permalink)
toyjeep73 Registered User Join Date: May 2008 Member # 114239 Location: NE Fla Posts: 260	Flat Spot Hell on Rockers So I was really stupid and let my 42x15x16.5 Rockers on 8-bolt H1's sit at 0-5 lb of pressure for probably a month back in December. They flat spotted so bad you could see it and they will not go away. I have not been able to drive it on road since then (and not had a chance for off road) and am starting to get extremely irritated. They are so bad that when the flat spots are in sync, you feel like you are on a pogo stick, and when they get out of sync, you feel like the rig is about flip off the road. I have not gotten it above about 20 mph cause I feel like I'm going to die. So far I have tried driving it around the neighborhood for about 10-20 min each trip at 10 psi, 20 psi, and finally 25 psi. I let it sit on jackstands at 25 psi for about 2 weeks just recently, and they WILL NOT GO AWAY! What can I do beside replace them?!?!?!? __________________ Just another SJ w/ 360/435/203/205/HP60/14B/42's

04-11-2010, 01:16 PM	#2 (permalink)
Wilson Registered User Join Date: Sep 2001 Member # 7233 Location: Paradise, CA Posts: 17,077	You're going to have to drive them to get the tires to heat up and round back into shape. __________________ [COLOR=Red][SIZE=4]ECV 7-11[/SIZE][/COLOR] Serving up a Tsunami of Swagger

04-11-2010, 01:24 PM	#3 (permalink)
The Rockslut Registered User Join Date: Jun 2001 Member # 5021 Location: Lincoln, CA Posts: 5,967	I would air them up to the posted max psi and drive them around the hood. __________________ Don't be "THAT GUY" on the trail. www.voodoowax.com

04-11-2010, 06:05 PM	#6 (permalink)
Dookey GM at TWF Join Date: Oct 2003 Member # 23680 Location: Wichita, KS Posts: 7,256 Blog Entries: 1	You're fawked. Sell them to me cheap. __________________ ANDY<--- ME! TrailWorthyFab.com<--- THE BEST DOUBLE BEAD LOCKS! Project: Dookey's revenge<--- My Junk! OFF ROAD GEAR<--COOL SWAG!

04-12-2010, 07:10 PM	#8 (permalink)
jam0o0 Granite Guru Join Date: Apr 2006 Member # 71891 Location: Houston, TX Posts: 796	tires heat better when you can drive on them. max the air and go find a freeway. lots of heavy brakeing and accelerating on the way there. if you can't get above 20 then you aren't gunna ever get them back. __________________ 95 ford bronco, 351W - one tons, 38's, lockers, no discernible driving ability 93 F250, 7.3T, ZF5

04-11-2010, 05:51 PM	#5 (permalink)
Johno33772 Registered User Join Date: Oct 2004 Member # 37077 Location: Tampabay FL Posts: 73	Air them up & ride em on the road, they will go round as soon as they warm up a little, they wiil be just fine. Don't leave sitting deflated, leave 15-20' of air in them

04-12-2010, 06:10 PM	#7 (permalink)
trusted_expert Registered User Join Date: Mar 2010 Member # 157081 Location: don't move here, WA Posts: 96	tires build heat faster at a lower psi so id drive on them at a lower psi untill they begin to warm up

04-13-2010, 05:26 AM	#10 (permalink)
SwampWalker3 Registered User Join Date: Sep 2005 Member # 52851 Location: Gainesville, Florida Posts: 156	Should trade me your headache for some new 38.5 boggers. __________________ Zane Neher 88 YJ. H.O. 4.0L/AW4/twin sticked d300/1 tons/38.5s.

04-13-2010, 03:46 PM	#12 (permalink)
mudskipper4x4 AllUpInYourFace Join Date: May 2006 Member # 72951 Location: in a van down by the river Posts: 1,629	This reminds me.... I need to air up mine from 5psi, Thanks! __________________ 76 CJ-7... mostly chevy parts www.centexoffroad.com

04-13-2010, 03:58 PM	#13 (permalink)
PpaZmrf Granite Guru Join Date: May 2007 Member # 92407 Location: Fullerton, Ca Posts: 585	X2 Fawk! Haha, goin to the yard now to air up and jack up! __________________ O.C.T. Orange County Toys If you play with it, it will grow. 87 Zuk truggy, 37" PBR's, Duals w/marlin 4.7's, 5.29's, Flat belly, 3-link front, Deaver rears, ram assist, 6 shooters/arp's, Longs, Yota's w/HP V6 front ARB, Rear v6 ifs Spooled, 112"wb. BigBear rig: '84 Yota with some work.

04-14-2010, 06:37 PM	#14 (permalink)
WHATAHEEP Registered User Join Date: Apr 2005 Member # 46170 Location: Baltimore Posts: 83	wouldn't driving them at low pressure get them hot faster __________________ I came to pirate for the love and hospitality.

04-15-2010, 07:31 PM	#16 (permalink)
Forumboarder1 Registered User Join Date: Mar 2010 Member # 156419 Location: Washington Posts: 23	I bought some 37 inch super swamprs that sat for a year or so and ther was multiple flat spots. but driving it for about a week seemed to get them round again it was not a very fun week though!!!

04-20-2010, 04:17 AM	#17 (permalink)
toyjeep73 Registered User Join Date: May 2008 Member # 114239 Location: NE Fla Posts: 260	Did a 40 mile trail ride this past weekend, by the end of it I could get up to speed and all seems to be better. I wil not be leaving them for looooong periods of time with loooow pressure again. __________________ Just another SJ w/ 360/435/203/205/HP60/14B/42's

04-20-2010, 10:26 AM	#18 (permalink)
Loftis61 Rock God Join Date: Dec 2009 Member # 148442 Location: In the middle of a cornfield Posts: 1,071	Good to know its sorting itself out. Thanks for checking back in and letting us know. __________________ The computer beat me at checkers once, but it was no match for me in kickboxing.

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