1989 Isuzu trooper tire sizes & fitment
Approved tire and wheel sizes for the 1989 Isuzu Trooper, sourced from manufacturer fitment data and refreshed monthly.
Approved fitments
| Tire size | Rim size | PCD (bolt pattern) | Offset | Load index | Speed rating |
|---|---|---|---|---|---|
| 225/75R15 OEM | R15 | 6x139.7 | N/A | N/A | N/A |
| 235/75R15 OEM | R15 | 6x139.7 | N/A | N/A | N/A |
1989 Isuzu trooper wheel bolt pattern & specs
| Bolt pattern (PCD) | 6x139.7 |
|---|---|
| Wheel thread / lug size | M12x1.5 |
| Center bore | 108.0 mm |
| Source | bolt-pattern.com |
Best by use case
Four tires, four jobs
See the best tires for the Isuzu Trooper, ranked by category →
Tire recalls & safety complaints for the Isuzu Trooper →
Plus-size and winter-downsize options for every Isuzu Trooper factory size →
Compatible alternative sizes for 225/75R15
Sizes within the ETRTO ±3% overall-diameter safe-fit tolerance. Each row links to the size's own page.
| Alternative size | %Δ OD | Category | Verdict |
|---|---|---|---|
195/80R16 |
-0.01% | plus 1 | Safe |
205/70R17 |
0.04% | plus 2 | Safe |
215/85R14 |
0.36% | winter narrower | Safe |
225/70R16 |
0.40% | plus 1 | Safe |
225/80R14 |
-0.40% | alternative | Safe |
For the full list of alternatives with comfort/handling impact, see 225/75R15 upsize options. To check an arbitrary size pair, use the tire compatibility calculator.
Check a different size against this vehicle
Type any tire size below; we'll compute its overall-diameter delta against the OEM 225/75R15 and verdict using the ETRTO ±3% rule.
Common upgrade paths
- Plus-1: 195/80R16; one rim size up, -0.01% OD change. Sharper steering, mild ride penalty, modest cost premium.
- Plus-2: 205/70R17; two rim sizes up, 0.04% OD change. Noticeable ride penalty, higher pothole risk, meaningful tire-cost premium.
Use the plus-size calculator to evaluate any rim step against the OEM size.
How to choose tires for the 1989 isuzu trooper
The 1989 Isuzu Trooper ships from the factory on 225/75R15 tires mounted on R15 wheels. 2 approved fitments are documented for this model year, allowing some flexibility between performance, comfort, and winter compounds. The Compatible alternative sizes table above lists every safe substitution within the ETRTO ±3% overall-diameter tolerance.
Tire choice on the Isuzu Trooper comes down to three trade-offs that matter more than brand loyalty: load index (must equal or exceed the OEM number), speed rating (must match or exceed the placard), and UTQG treadwear (higher means longer life, lower usually means stickier rubber). Owners replacing factory tires with the same compound class, for example all-season for all-season, generally see no change in ride characteristics or fuel economy. Switching categories (performance summer to all-season touring, for example) is where the trade-offs show up at the contact patch.
For 1989 Isuzu Trooper owners considering a plus-size upgrade, the safer option is a Plus-1 step (one rim size up with a 10-point aspect drop and ~10 mm of additional section width). Plus-2 is technically viable on this chassis if the alternative-sizes table lists a Plus-2 candidate within tolerance, but expect a meaningful ride-harshness penalty and a tire-cost premium of 30–60% per tire relative to the OEM fitment. For winter use the recommended pattern is one width step down (e.g. from a 235 to a 225) with the aspect ratio bumped up to preserve overall diameter; narrower tires apply higher contact pressure per square inch on snow, which translates directly into shorter braking distances. The plus-size calculator evaluates any specific rim step against this OEM size.
Before purchasing, verify the tire size on the driver-door placard of your specific 1989 Isuzu Trooper, since trim levels and option packages can shift the original fitment from what is documented here. The placard reading is the authoritative source per FMVSS 110, and dealers will reference the placard rather than aftermarket catalogs when validating warranty claims.
NHTSA-reported issues for 1989 isuzu trooper
Top issue category: Tires (General)
Most reported: Tires (General) (25) · Tread / Belt (15) · Sidewall (4)
Reported across: 1988 – 2002 (11 years)
What owners described
Tread or belt separation is the most common description, in 19% of these reports. Percentages are shares of the 27 reports covering every model year of the Isuzu Trooper that include a written account; a single report can describe more than one problem, so they do not total 100%.
| Reported problem | This subject | All tire complaints | Relative |
|---|---|---|---|
| Tread or belt separation | 19% | 13% | 1.4× |
| Blowout or sudden deflation | 15% | 20% | 0.7× |
| Sidewall failure | 11% | 15% | 0.7× |
| Loss of control, rollover or collision | 11% | 8% | 1.3× |
| Bubble or bulge in the tire | 4% | 6% | 0.6× |
| Cracking or dry rot | 4% | 9% | 0.4× |
Mileage at failure
8 of these reports state an odometer reading. The middle report is at 21,000 miles, with 8 in 10 falling between 12,000 and 119,000 miles.
In owners' own words
Verbatim excerpts from complaints filed with NHTSA about Isuzu Trooper. Reports are published by NHTSA as filed and are lightly cleaned here only to remove intake codes.
THE CONTACT OWNS A 2002 ISUZU TROOPER EQUIPPED WITH BF GOODRICH MUD TERRAIN T/A KM2 TIRES, SIZE: LT265/75R16. WHILE DRIVING BETWEEN 55-65 MPH, THREE OF THE TIRES EXPERIENCED TREAD SEPARATION. THERE WERE MOMENTARY VIBRATIONS JUST BEFORE THE FAILURES. THE FAILURES OCCURRED ON THREE OCCASIONS. THE VEHICLE WAS TAKEN TO A TIRE DEALER WHERE THE FRONT DRIVER SIDE AND REAR DRIVER AND PASSENGER SIDE TIRES WERE DEEMED DEFECTIVE. THE TIRES WERE REPLACED. THE DEFECTIVE TIRES WERE REPLACEMENT TIRES WITH ONLY 12,000 MILES ON THEM PRIOR TO THE FAILURES. THE VEHICLE FAILURE MILEAGE WAS 49,000 AND THE TIRE FAILURE MILEAGE WAS 12,000. THE VIN AND DOT NUMBER WERE NOT AVAILABLE.
PE00 020; CONSUMER TOOK TIRE INTO FIRESTONE AGENCY AND THE ATTENDANT TOLD HIM THAT HIS REAR TIRES WERE DRY ROTTED. FIRESTONE, BRIDGESTONE DULLER, #684 2457014. HE HAD THEM REPLACED IN THE REAR TIRES, AND THE FRONT TIRES HAD TO BE REPLACED.
PE00 020; CONSUMER WAS TRAVELING 75MPH ON HIGHWAY AND LOST CONTROL OF VEHICLE BECAUSE REAR TIRE TREAD SEPARATED FROM TIRE, AND FLIPPED MULTIPLE TIMES. *AK DRIVER DIED FROM HEAD INJURIES, I PERSON WAS INJURED, TIRES WERE BRIDGESTONE DESERT DUELLER, SIZE P235/75R15, DOT WK13356. *SLC
BLOWOUT OCCURRED ON JULY 31, 2002 AT APPROXIMATELY 4:45PM ON ROUTE 2 IN THE EAST BOUND HIGH SPEED LANE. I FELT THE CAR VIBRATE. BEFORE I WAS ABLE TO PULL OFF THE HIGHWAY, THE LEFT REAR TIRE BLEW OUT AT APPROXIMATELY 65M.P.H. I SWERVED INTO THE RIGHT LANE AND BACK INTO THE LEFT LANE ATTEMPTING TO MAINTAIN CONTROL OF THE VEHICLE BEFORE IT WENT INTO A 360 DEGREE PLUS SPIN. THE ENGINE SHUT OFF AND THE VEHICLE ROLLED BACKWARD INTO THE CENTER MEDIAN.
Complaints are voluntarily submitted to the NHTSA Office of Defects Investigation and are not verified by NHTSA; they represent owner-reported problems, not proven defects. Counts can be useful as a relative quality signal across comparable tires or vehicles.
Frequently asked questions
What size tires fit a 1989 Isuzu Trooper?
What is the bolt pattern of a 1989 Isuzu Trooper?
Can I run a different tire size on my 1989 Isuzu Trooper?
Where can I buy tires for my 1989 Isuzu Trooper?
What is the recommended tire pressure for the 1989 Isuzu Trooper?
Can I fit winter tires in a different size on my 1989 Isuzu Trooper?
How often should I rotate the tires on my 1989 Isuzu Trooper?
For broader tire questions; replacement timing, UTQG, EV-specific tires, winter swaps; see the tire FAQ.
Sources for this page
- Vehicle owner's manual tire & wheel placard; door-jamb placard on the Isuzu Trooper is the authoritative source for OEM tire size, load index, and cold-inflation pressure for your specific trim.
- NHTSA SaferCar; recall lookup for the 1989 Isuzu Trooper.
- ETRTO 2024 Standards Manual §2.3; overall-diameter math used for the alternative-size verdicts above.
- Tire & Rim Association 2025 Yearbook; load-index to maximum-load reference.
Last verified 2026-10-07.