1991 Cadillac seville tire sizes & fitment
Approved tire and wheel sizes for the 1991 Cadillac Seville, sourced from manufacturer fitment data and refreshed monthly.
Approved fitments
| Tire size | Rim size | PCD (bolt pattern) | Offset | Load index | Speed rating |
|---|---|---|---|---|---|
| 215/65R15 OEM | R15 | 5x115 | N/A | N/A | N/A |
1991 Cadillac seville wheel bolt pattern & specs
| Bolt pattern (PCD) | 5x115 |
|---|---|
| Wheel thread / lug size | M12x1.5 |
| Center bore | 70.3 mm |
| Source | adaptitusa-reference |
Best by use case
Four tires, four jobs
See the best tires for the Cadillac Seville, ranked by category →
Tire recalls & safety complaints for the Cadillac Seville →
Compatible alternative sizes for 215/65R15
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 |
|---|---|---|---|
235/65R14 |
0.09% | alternative | Safe |
195/65R16 |
-0.09% | plus 1 | Safe |
195/85R13 |
0.18% | alternative | Safe |
235/70R13 |
-0.20% | alternative | Safe |
185/75R15 |
-0.30% | winter narrower | Safe |
For the full list of alternatives with comfort/handling impact, see 215/65R15 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 215/65R15 and verdict using the ETRTO ±3% rule.
Common upgrade paths
- Plus-1: 195/65R16; one rim size up, -0.09% OD change. Sharper steering, mild ride penalty, modest cost premium.
- Plus-2: 205/55R17; two rim sizes up, -0.48% 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 1991 cadillac seville STS
The 1991 Cadillac Seville STS ships from the factory on 215/65R15 tires mounted on R15 wheels. Only one approved fitment is documented for this model year, so replacement options should match the original size exactly unless a plus-size upgrade is being considered. The Compatible alternative sizes table above lists every safe substitution within the ETRTO ±3% overall-diameter tolerance.
Tire choice on the Cadillac Seville 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 1991 Cadillac Seville STS 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 1991 Cadillac Seville STS, 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 1991 cadillac seville
Top issue category: Tires (General)
Most reported: Tires (General) (19) · Tread / Belt (6) · TPMS (1)
Reported across: 1977 – 2001 (12 years)
What owners described
Tread or belt separation is the most common description, in 15% of these reports. Percentages are shares of the 13 reports covering every model year of the Cadillac Seville 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 | 15% | 13% | 1.1× |
| Blowout or sudden deflation | 8% | 20% | 0.4× |
| Cracking or dry rot | 8% | 9% | 0.8× |
In owners' own words
Verbatim excerpts from complaints filed with NHTSA about Cadillac Seville. Reports are published by NHTSA as filed and are lightly cleaned here only to remove intake codes.
P300 020; CONSUMER WAS TRAVELING ABOUT 59MPH ON A HIGHWAY AND HEARD A POOPYING NOISE. SHE WAS ABLE TO PULL OVER TO SHOULDER AND NOTICED THAT PASSENGER'S REAR BACK TIRE TREAD SEPARATED. TREAD WAS IN MIDDLE OF ROAD. FIRESTONE, P21570R14, FR 721, FIRESTONE WILL BE NOTIFIED.
ON 6/25/98 I PLACED 4 NEW GOODYEAR TIRES AT 30948MILES. ON 6/22/00 BLOWOUT AT 55MPH LEFT REAR AT 43958 MILES. REPLACED BLOWOUT W/ GOODYEAR TIRE. ON 3/24/01 BLOWOUT LEFT FRONT GOODYEAR. ON 4/13/01 BLOWOUT AT 60MPH LEFT REAR [THE GOODYEAR PLACED ON 8/1/00] AT 48344 MILES. TOO MANY BLOWOUTS...NO INJURIES, BUT LUCKY. DID NOT HIT ROAD HAZARDS. (TIRESIZE: P225/60R16)( DOT NUMBER: TIRE SIZE: P225/60R16 )
WHILE DRIVING ALL TIRES HAVE FAILED, RESULTING IN TEMPORARY LOSS OF CONTROL AT HIGH SPEED, WITH THE VEHICLE SWERVING A FULL LANE TO THE RIGHT, DUE TO VARIOUS NAIL INDUCED SMALL LEAKS AND VALVE STEM FAILURES, CONSUMER WAS ADVISED BY TECHNICIAN THAT MULTIPLE FLATS IS NORMAL IN HIGH-CONSTRUCTION, NORTH SCOTTSDALE, THIS HAS HAPPENED 4 TIMES- 4-26-00, 10-28-00, 11-27-00 AND 3-11-01.
TIRE BLEWOUT ON HIGHWAY FOR NO APPARENT REASON. CAR HAD BEEN SERVICED AND TIRES ROTATED AND CHECKED SEVERAL DAYS EARLIER. A COUPLE OF TIRE DEALERS CHECKED THE TIRE AND COULD FIND NO EVIDENCE OF ROAD HAZARDS. I STILL HAVE THE TIRE, BUT TRYING TO PROVE IT WASA STRUCTURAL DEFECT I CAN SEE IS GOING TO BE NEXT TO IMPOSSIBLE. CADILLAC COVERS ALL DEFECTIVE PARTS, BUT GOODYEAR SAYS YOU CAN'T PROVE THE TIRE WAS DEFECTIVE EVEN IF THERE IS NO EVIDENCE OF A PUNCTURE OR HITTING SOMETHING IN THE ROAD! YOUR INPUT AND HELP IS APPRECIATED. *AK (DOT NUMBER: 1 6-000-12 TIRESIZE: 235/60-16)
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 1991 Cadillac Seville?
What is the bolt pattern of a 1991 Cadillac Seville?
Can I run a different tire size on my 1991 Cadillac Seville?
Where can I buy tires for my 1991 Cadillac Seville?
What is the recommended tire pressure for the 1991 Cadillac Seville?
Can I fit winter tires in a different size on my 1991 Cadillac Seville?
How often should I rotate the tires on my 1991 Cadillac Seville?
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 Cadillac Seville is the authoritative source for OEM tire size, load index, and cold-inflation pressure for your specific trim.
- NHTSA SaferCar; recall lookup for the 1991 Cadillac Seville.
- 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 2026-09-02.