What Tire Pressure?

[Rebelman]

Just got a set of LT265/7516s 6PR Buckshot Mudders put on this 96 LR Disco I SE7. Is there a website where I can find a chart giving tire pressures for upsizing. The vehicle recommends 26 frt and 36 rear for OEM tires. Max pressure for the Buckshots is 50psi. thanks

[llesra]

in my 265/75/16 trxus i put 32 front and 38 rear. you can always do the 'ol chalk test

[siam]

Originally Posted by llesra

in my 265/75/16 trxus i put 32 front and 38 rear. you can always do the 'ol chalk test

What's up llesra, was wondering what setup lift have you on your Disco? just got the Radial TSL in a 265/80/16 mounted on american racing steelies.. can't wait to have everything together by next week...

[Disco Mike]

I run 35#s in the front and 40"s in the rear on my D2. After 4 years of driving I ound this to give me the best tread wear and MPG on my BFG MT's.
Just so you know, the air pressure ratings on the door jam are determined by Rover to be the lowest air pressure you can run while giving you the best ride. They are not ment to give the best MPG or tread life it is just for comfort.
Mike

[p76rangie]

It seems we run around the same. I find that anything over about 35 in the front gives a bit of a rough ride and too much feedback through the steering. I will run 40 in the back on a trip with a bit of a load in, otherwise around 38.

Ian

[Searcaigh]

On road I run 40psi all round on Michelin Synchrones

[me.guevara]

I'm with Gordon on this one: 40 psi all around unless I hit some sand or mud, then I air down appropriately. I'm running on Goodyear AT/S.

[Rebelman]

After studying this tire pressure stuff a little more, I found it to be totally in relation to the weight of the vehicle. Now I understand why the vehicle suggested pressure for original equipment must be followed. That is why the OE tires run 26 in the frt and 36 in rear on this LR. My Nissan Sentra is basically the same weight all around which is why the vehicle sticker suggest 33 lbs all around. However, when upsizing and or running certain off road tires the OEM stuff goes out the window. I found a chart at To link to or bookmark this page, use the following url: http://www.google.com/search?q=cache...s&ct=clnk&cd=1

The LT265/75R16 (6 ply rating at 2470# load rating) max tire pressure for load range C is the same on the Buckshots I have as the chart (50psi). The lowest psi suggested for the Radial Ply is (35psi) for a single axle tire of this size at a load limit of 1910 lbs which certainly covers this LR. The total GVWR is 6019# with front being 2668# (1334# each tire) and rear being 3572# (1786# each tire) per door sticker. There is no reason to run anything else except 35 psi all around. As you will see on the chart, as the weight of the vehicle goes up, the suggested tire pressure also increases such as when the weight of the vehicle equals 2100 lbs on one tire this size, the psi goes to 40 and if the weight increases to 2280 lbs per tire the psi goes to 45. Thanks again and I hope this will be of help to others.

[siam]

nice to hear other people are also running on the 40 psi range. I'ev been told sooooooo many time that 36 should be the maximum air pressure. I find the tire tend to wonder big time on road and not mention the crappy fuel milage. also measured the tire temp and it only goes up 3 to 4 pounds wehn running 40 psi so that means the tire are with in acceptable operating range.. couldn't help it. a buddy had one of those laser tire/track temp checker thing a-ma-bobs, had to do it for peace of mind as well..

[Rebelman]

siam. What is the size tire you are running? Is it stock or upsized? What is the weight of the vehicle per tire (front) and (rear)? I cannot say you are right about running 40psi unless I know these things. Thanks

[siam]

Was on a 88 RRC 265/75/16 super swamper truxus .. when on a lower psi the lugs would grab the road a little too well and make the Rover wander a bit. but when I went 40 front 42 rear.. drove like a car.. most of the time i was lugging a dirt bike and with the 42 psi rear it seem to do fine.. I have yet got to experiment on my radial TSL PSI on my Disco 1

[jhmover]

I have 245 75 16 MTR's I run 40 psi all the way around. Must be close to right I bought the tires with about 6 k on them and I've put about 50k on them so the have about 56k on them and I still have tread left and no wierd wear patterns to speak of.

[Rebelman]

SIAM. Return to top
Return to Introduction to Range Rovers
Range Rover Classic (US Spec)
Dimensions, Weights and Capacities
Length 175 inches (183 inches LWB models 1993 on)
Width 71.4 inches
Height 70.8 inches
Wheelbase 100 inches (108 inches LWB models 1993 on)
Track 58.5 inches front & rear
Turning Circle 39.4 ft (44.85 ft LWB)
Ground Clearance 8.0 inches
Fording Depth 20 inches (21.6 inches air suspension models hi profile)
Approach Angle 30 deg w/spoiler on (33 deg air suspension models hi profile)
40 deg w/spoiler off (43 deg air suspension models hi profile)
Departure Angle 30 deg (33 deg air suspension models hi profile)
Breakover Angle 29 deg (30 deg LWB hi profile, 33 deg County 1994-95 hi profile)
Luggage Capacity 36.2 cu ft (rear seat up), 70.6 cu ft (rear seat down)
Curb Weight 4,401 lbs (4574 lbs LWB)
GVWR 6,019 lbs
Payload 1,618 lbs
Max Trailer Wt 5,500 lbs with brakes (6500 lbs LWB), 1,650 lbs without brakes
Max Tongue Wt 550 lbs
Fuel Capacity 20 US gallons (to 1990), 21.6 US gallons (1991-95)

Engine Data
Engine Type 90 deg pushrod aluminum V8, steel cyl liners
Displacement 3532cc (1987-88)
3950cc (1989-95 SWB models)
4200cc (LWB)
Bore/Stroke (inches) 3.50/2.80 (to 1988), 3.70/2.80 (1989-95 SWB models), 3.70/3.30 (LWB)
Compression Ratio 8.1:1 (to 1988), 8.13:1 (1989-92), 9.35:1 (93-95), 8.95:1 LWB
Power (hp @ rpm) 150 @4750 to 1988, 178 @4750 from 1989, 200@4850 LWB
Torque (lb-ft @ rpm) 195 @3250 to 1988, 225 @3250 1989 on, 251 @3250 LWB
Engine Management Lucas multiport fuel injection
Ignition System Electronic, distributor w/magnetic pickup
Fuel Premium Unleaded

Drivetrain Data
Transmission ZF 4HP22 4 speed auto w/torque convertor lockup in 4th gear
Torque Conv Lockup 40 mph (1987), 52 mph (1988-95)
Transmission Ratios 2.48, 1.48, 1.00, 0.73:1. Reverse: 2.09:1
Transfer box 1987-88: Land Rover LT230 gear-driven w/manual locking differential
1989-95: Borg Warner chain-driven, w/viscous locking differential
Transfer box ratios 1989-95: 1.206:1 (hi), 3.244:1 (lo)
Differentials 3.54:1 ratio spiral bevel diffs.
4WD type: Permanent 4WD
Axles Solid axles, fully floating hubs with both differentials in line on one side
10-spline axles to mid-1993; 24 spline from then on
Traction Control: Rear wheels (1993-5)
Wheels 16x7 inch alloy
Tires 205/R16 or 205/80R16
Brakes Discs (front ventilated from 1991); 4 channel ABS from 1990
Swept area 496 sq in

Suspension
Front: Rigid axle located by radius arms and Panhard Rod.
Coil Springs 133 lb/in 1987-93
Electronically adjustable air springs LWB 1993 and all models 1994-95
Anti-Sway Bar (County models from 1991)
Rear: Rigid axle located by radius arms and A-frame
Boge self leveling strut
Variable Rate Coil Springs 120-178 lb/in 1987-91
Constant Rate Coil Springs 150 lb/in County models from 1991-93
Electronically adjustable air springs LWB 1993 and all models 1994-95

Standard Appointments
Heated outside mirrors (from 1989)
Heated windshield w/heated washer jets (from 1989)
Heated rear window w/power wash and wipe
6 way electrically adjustable front seats (most models)
Power front windows
Power sunroof (optional to 1990, standard on County models 1991 onwards)
Automatic dimming rear view mirror (County models and all models 1991 onwards)
Audio System: 6 speaker am/fm cassette; optional 6 disc CD changer & woofer (standard 1993 on)
Air conditioning
Sealed beam halogen headlights w/power wash; auxiliary fog lights
Puddle lamps (front)
Cruise Control
Driver & passenger airbags (1993-95)
Central locking system (extended to tailgate and fuel filler from 1989)
Integral Class III trailer hitch receiver
Leather seats (optional before 1989)
Leather and walnut trim
Child locks on rear doors

Performance Data
1987-88 (Car & Driver, July 1988)
0-60mph 13.5 sec
Standing 1/4 mile 19.4 sec @ 70 mph
Top Speed 97 mph
EPA city/hwy 14/14
Observed fuel use 13 mpg (Car & Driver)
Braking 70-0 218 ft
Skid Pad 0.65g

1989-95
0-60mph 11.5 sec (Four Wheeler Magazine, Sept 1991)
Standing 1/4 mile 17.62 sec @ 83.9 mph (Four Wheeler Magazine, Sept 1991)
Top Speed 110 mph (factory claim)
EPA city/hwy 12/15
Observed fuel use 13 mpg (Four Wheeler Feb 1989), 15.6 mpg (Four Wheeler April 1991)
Braking 70-0
Skid Pad

LWB (Car & Driver, Sept 1992)
0-60mph 10.1 sec
Standing 1/4 mile 17.7 sec @ 77 mph
Top Speed 111 mph
EPA city/hwy 12/15 mpg
Observed fuel use 10 mpg (Car & Driver)
Braking 70-0 215 ft
Skid Pad 0.69g

With all this info still not sure of exact weight of front versus rear of vehicle. Total weight of 6019 probably means the same as my 96 LR and 35psi is what I would use on that tire. However, if tire and rim are totally different from LT tires, then do what you think is right or according to your tire dealer. Thanks

[Rebelman]

JHMOVER. Not sure what vehicle weight you are dealing with either. Not sure if your tires are similar to LTs. If weight distribution is same as on my 96 LR pressure for LT245/75R16s would be 35psi at 1700# of weight on one tire, 40psi at 1865#, and 45psi at 2030#. Again, do not know if you are dealing with special off road tires and rims but if same as LTs, I am using this reference since it correlates between weight and pressure. Again, whatever works for you. Thanks

[p76rangie]

There is only one real way to determine the correct tyre pressure and that is to look at the tyre manufacturers specs for the tyre. If they are any good, they should specify a static load radius. This is the distance from the centre of the axle to the ground. You basically change the tyre pressure until you obtain the correct measurement. This takes into account the different weights of vehicles and whether you have it loaded or not.

Another simple test is to take your tyre pressures when cold and before heading off for a trip. After a decent distance travelled, check the tyre pressure again hot. If you pressure has increased by more than 4 psi, you do not have enough air in the tyre.

Ian