| Author | Message | ||
     Jamie (Rover_puppy) New Member Username: Rover_puppy Post Number: 25 Registered: 05-2003 |
I am trying to figure out approximate best tire pressure for BFG 265/75/R16 Mud Radials. When I had them installed, I was told that I would have to play around with them to see what works best. I am quite sure that would NOT be a good idea for me to do. I'm looking for some "ballpark" numbers for both on road driving AND off road driving. I'd appreciate some ballpart numbers for what anyone else has found to work best. I did read the recent thread about measuring out your tires (with chalk?) to find correct pressure, but that went right over my head. From what I understand, it is best to check tires while they are cold? When that is not possible, are there adjustments to the numbers for hot tires? Thanks for your help, Jamie | ||
| michael burt (Mikeyb) Senior Member Username: Mikeyb Post Number: 345 Registered: 03-2002 |
damn jamie, you are jumping right in with your truck...new rack, bumper questions, armoring up the soft underbelly. you go get 'em on that trip to moab! i have truxxus m/t's so they are a little different, but i feel street pressure for me is working best at 40 front 45 rear, measured cold. i don't know a good ballpark adjustment for pressure hot. off road depends on if you are on rocks, sand you want to float on, mud you want to float on or sink through to firmer ground, and load. most folks lower their pressure for rock climbing, EXCEPT if there is the chance of sidewall damage due to sharp rocks or pinching the tire between the rock and ground. most people air down to travel on sand. and mud, EXCEPT if the mud is thin and you would be better off sinking through the soft layers of mud to get to something more solid underneath. and it all depends on the load you are carrying. and the first thing one should consider when making trailside air adjustments...will you be able to return to a safe highway pressure after you air down for the trail? so, if you do not have an airtank or compressor or are with someone that does, you should not air down much at all...;) not much help, but things to keep in mind. anyway...since you have spent so much for your trip aready, now you can buy an airtank too! | ||
| Jaime (Blueboy) Senior Member Username: Blueboy Post Number: 703 Registered: 02-2002 |
Other Jamie, so you didn't like the chalk line method I suggested? it is a pain, yet, it does work. OK. try this one. first inflate your tires to what LR recommends when they are cold. should be on the door post or somewhere. then try this: "The advise offered was as follows:- Regardless of the size and profile of your tyre, check the pressure of your tyres first thing when they are cold then take your truck out onto the highway and get the tyres well & truely warmed up. Stop and re-check your tyre pressure and the increase in pressure should be 4 psi. If you find the increase in pressure was under 4psi, then your tyres were already over-inflated and if the growth in tyre pressure exceeded 4psi then your tyres were under inflated." This should give you a ball park figure. Good luck, Jaime | ||
| Jamie (Rover_puppy) New Member Username: Rover_puppy Post Number: 26 Registered: 05-2003 |
Thanks, that WAS helpful. I do have an air pump, it is a high tech model that plugs into my cig lighter and cost $9 at Home Depot! Of course, it takes a long time to air tires back up - but, at this stage in the game, that's a good thing for me since I have been exhausted when time to return to the roads. Good excuse to take a much needed rest!! I do have airtank on my "someday" list. Thanks for encouragement. Before I even get to Moab, I have to get across the country which should be interesting? Sure looks like a long way there on the map!! I have NEVER driven that far, I've barely been out of my state! Thanks, Jamie | ||
| Jamie (Rover_puppy) New Member Username: Rover_puppy Post Number: 27 Registered: 05-2003 |
Jaime, Thanks I will try that. I just happen to have some sidewalk chalk! Besides similar names, one of my dogs is named Blue, and I call him Blueboy much of the time. BTW, that was NOT an insult, Blue is my very very very BEST FRIEND! Thanks, Jmaie | ||
| Jamie (Rover_puppy) New Member Username: Rover_puppy Post Number: 28 Registered: 05-2003 |
Woops! Looks like I mispelled MY name!! | ||
| Jaime (Blueboy) Senior Member Username: Blueboy Post Number: 705 Registered: 02-2002 |
Blueboy is the name my wife gave to my 109. you can see it if you click my name. its blue and she said its a boy car so Blueboy it is. so what type of 4 paw drive rovers do you have? we have 2 yellow Labs - boy and girl living in sin together. Jaime | ||
| Jamie (Rover_puppy) New Member Username: Rover_puppy Post Number: 29 Registered: 05-2003 |
2 Shetland Sheepdogs (think collies - like Lassie, but not as big). They are perfect off road companions, HAPPY to go anywhere and they NEVER complain! | ||
| michael burt (Mikeyb) Senior Member Username: Mikeyb Post Number: 351 Registered: 03-2002 |
if you come through dallas on your way out, let me know, i would like to see this uber truck before it gets rockrash! i'll buy you a beer... ;) | ||
| Jamie (Rover_puppy) New Member Username: Rover_puppy Post Number: 32 Registered: 05-2003 |
I am mentally preparing myself for rockrash and such by calling them memories and souveniers. I have some really great memories and souveniers on the interior roof from the spray I created when I finally GOT THROUGH the mud without getting stuck. I got stuck in the mud so deep so many times that I feel like I earned that mud!! The stains don't bother me a bit! What is "uber"? Thanks for the offer, you never know, I just may drive through Texas on my way out there, I have yet to even consider my route. Actually, my true travel preference would be to just drive fully loaded rover into cargo hold of transport aircraft. Dogs and I could just sit there and rest, then just drive out of plane when we arrived. Thanks, Jamie | ||
| michael burt (Mikeyb) Senior Member Username: Mikeyb Post Number: 356 Registered: 03-2002 |
a plane sounds like a good plan...! uber is german for super... whatever route you take, be carefull and have a great time for all of us...! mike | ||
| Jamie (Rover_puppy) New Member Username: Rover_puppy Post Number: 33 Registered: 05-2003 |
Mikeyb, I finally took a picture of my rover, and just managed to upload it to Dweb. Just remember, even though my rover is growing up, I am still a kindergartener on bunny hills! So, I suppose I can call this my pre-rockrash photo? | ||
| Jamie (Rover_puppy) New Member Username: Rover_puppy Post Number: 34 Registered: 05-2003 |
Jaime (Blue Boy), I tested my tires today BFG 265/75/R16) per your instructions: This AM: (cold tires)- ALL tires equal at 32 psi This PM: (hot tires) - 34 psi all tires EXCEPT rear tire on drivers side was 35 psi. (on the side of my mud tires says it says with max load, the max psi for cold tires is 65 psi). Stock tires and wheels that I removed were 18" alloys and Goodyear Wrangler HP 255/55R/18 tires. My owners manual says: Normal Operating Conditions: Front 28 psi / Rear 38 psi Vehicle loaded to maximum gross vehicle weight: Front 28 psi / Rear 46 psi What do you think? I will try to locate the chalk thread for tire pressure checking and try that too. Thanks Again, Jamie (ps Luv your rover!!) | ||
| michael burt (Mikeyb) Senior Member Username: Mikeyb Post Number: 362 Registered: 03-2002 |
looks like you have put in a lot of work! and it is good to have before and after photos! even though rockrash usually means a good story, i hope it comes through unscathed...;) nice truck, jamie... mike | ||
| Jamie (Rover_puppy) New Member Username: Rover_puppy Post Number: 38 Registered: 05-2003 |
Finally found tire pressure for highway driving. I am posting since there may be someone else that needs to know? (I read this board for a VERY long time before I ever registered as a user.) For Highway Driving: 37 in the front 42-45 in the rear (full or empty) For softer feel in the city, a bit less. Thanks again for the help, Jamie | ||
| Dean Brown (Deanbrown3d) Senior Member Username: Deanbrown3d Post Number: 640 Registered: 02-2002 |
I put 40 back and 35 front in BFG/MT/kms, for a nice soft ride on road. Already have 20K miles on them and they still look new. In mud I don't air down, but I went 25/25 in moab |
