Tirefolio Find my fitment

1991 Mercury cougar tire sizes & fitment

Approved tire and wheel sizes for the 1991 Mercury Cougar, sourced from manufacturer fitment data and refreshed monthly.

Approved fitments

Tire size Rim size PCD (bolt pattern) Offset Load index Speed rating
225/60R16 OEM R16 5x108 N/A N/A N/A

1991 Mercury cougar wheel bolt pattern & specs

Bolt pattern (PCD)5x108
Wheel thread / lug sizeM12x1.5
Center bore63.4 mm
Sourceadaptitusa-reference

The 1991 Mercury Cougar uses a 5x108 bolt pattern, M12x1.5 lug thread, and a 63.4 mm center bore. Bolt pattern and hub specs are stable across a model generation; always confirm against your vehicle's existing wheel before buying aftermarket wheels, spacers, or adapters. Source: community wheel-fitment reference data. Full wheel specs →

Best by use case

Four tires, four jobs

Best all-season

Bridgestone

Turanza QuietTrack

all-season touring, UTQG 800, 80,000-mi warranty

Best budget

Goodyear

Assurance MaxLife

Lowest cost per mile in this size; UTQG 820

Best quiet

Bridgestone

Turanza QuietTrack

68 dB cabin noise (EU label); quietest in this size

Best winter

Bridgestone

Blizzak WS90

Dedicated winter (premium compound); ice/snow grip

See the best tires for the Mercury Cougar, ranked by category →

Tire recalls & safety complaints for the Mercury Cougar →

Compatible alternative sizes for 225/60R16

Sizes within the ETRTO ±3% overall-diameter safe-fit tolerance. Each row links to the size's own page.

Alternative size%Δ ODCategoryVerdict
245/50R17 0.06% plus 1 Safe
245/55R16 -0.07% wider Safe
245/45R18 0.19% plus 2 Safe
205/60R17 0.21% plus 1 Safe
245/60R15 -0.21% alternative Safe

For the full list of alternatives with comfort/handling impact, see 225/60R16 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 225/60R16 and verdict using the ETRTO ±3% rule.

Common upgrade paths

Use the plus-size calculator to evaluate any rim step against the OEM size.

How to choose tires for the 1991 mercury cougar XR7

The 1991 Mercury Cougar XR7 ships from the factory on 225/60R16 tires mounted on R16 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 Mercury Cougar 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 Mercury Cougar XR7 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 Mercury Cougar XR7, 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 mercury cougar

1
Complaints
1
Crashes
1
Injuries
0
Deaths

Top issue category: Tires (General)

Reported across: 1991 – 1991 (1 year)

What owners described

Sidewall failure appears in 30% of these reports; about 2.0× as often as across all tire complaints. Percentages are shares of the 46 reports covering every model year of the Mercury Cougar that include a written account; a single report can describe more than one problem, so they do not total 100%.

Reported problemThis subjectAll tire complaintsRelative
Sidewall failure 30% 15% 2.0×
Blowout or sudden deflation 22% 20% 1.1×
Cracking or dry rot 7% 9% 0.7×
Tread or belt separation 4% 13% 0.3×
Bubble or bulge in the tire 4% 6% 0.7×
Loss of control, rollover or collision 2% 8% 0.3×

Mileage at failure

13 of these reports state an odometer reading. The middle report is at 17,000 miles, with 8 in 10 falling between 11,200 and 44,000 miles.

In owners' own words

Verbatim excerpts from complaints filed with NHTSA about Mercury Cougar. Reports are published by NHTSA as filed and are lightly cleaned here only to remove intake codes.

CONSUMER WAS TRAVELING ABOUT 30MPH ON HIGHWAY AND HIT A SMALL POTHOLE IN THE ROAD. TIRE SIDEWALL SPLITTED, LIKE SOMEONE HAD CUT THE TIRE. THIS HAPPENED A YEAR AGO TRAVELING ABOUT 50MPH ON THE HIGHWAY, AND A CHUNK OF THE TIRE SIDEWALL SIMPLY EXPLODED WITH NO CONTACT AT ALL. FIRESTONE FIREHAWK #GTA02, SIZE 215/50/16. DEALERSHIP AND FIRESTONE HAS BEEN NOTIFIED.

NHTSA complaint 224393 · 1999 vehicle

ALL FOUR OF MY TIRES HAD THE BELTS SHOWING AT 17000 MILES. I HAVE PUT NEW ONES ON AND THEY ARE STARTING TO SHAKE JUST LIKE THE FIRST SET THAT WAS ON THE CAR. I HAVE HEARD OF OTHER COMPLAINTS ON THE TIRES FOR THE COUGAR. THIS IS NOT THE ONLY PROBLEM. THANK YOU. *AK( DOT NUMBER: TIRE SIZE: 215/50/16 )

NHTSA complaint 226919 · 1999 vehicle

THE UPPER LAYER OF THE FIRESTONE TIRE ON THE FRONT LEFT WAS COMPLETELY SEPARATED FROM THE REST OF THE TIRE. THIS WAS AT A SPEED OF ABOUT 60 MPH. THE TIRE WAS IN GOOD CONDITION WITH NO DAMAGE. IT WAS A VERY SCAREY AND DANGEROUS SITUATION WITH THE WHOLE FAMILY (WIFE AND 2 KIDS) IN THE CAR ON THE HIGHWAY, IN THE MIDDLE OF DESERT AND AT NIGHT. CALLED AAA FOR HELP AND WE WERE LUCKY THE CAT DID NOT OVERTURN. I HAVE HEARD VERY SIMILAR CASES WITH FIRESTONE. I BELIEVE THRE FIRESTONE TIRES ARE DANGEROUS AND SHOULD BE RECALLED. *AK( DOT NUMBER: TIRE SIZE: 215SR17 )

NHTSA complaint 227518 · 1988 vehicle

TREAD ON TIRES STARTED TO SEPARATE FROM TIRE HAD TO RELACE ALL TIRES SENT FIRESTONE AN E-MAIL THEY SENT BACK THE TRUCK TIRE RECALL INFO DID NOT TAKE TO DEALER BECAUSE THEY WOULD HAVE PUT FIRESTONES BACK ON,I SAVED ONE TIRE THAT WAS DAMAGED( DOT NUMBER: W2UN TIRE SIZE: P205/60RIS )

NHTSA complaint 231923 · 1999 vehicle

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 Mercury Cougar?
The OEM tire size for the 1991 Mercury Cougar is 225/60R16 mounted on R16 wheels.. Trim levels and option packages can shift the original fitment; confirm against your specific vehicle's driver-door placard before purchase.
What is the bolt pattern of a 1991 Mercury Cougar?
The 1991 Mercury Cougar has a 5x108 bolt pattern with a 63.4 mm center bore and M12x1.5 wheel studs. Bolt pattern is consistent across the model generation; confirm against your existing wheel before fitting aftermarket wheels or adapters.
Can I run a different tire size on my 1991 Mercury Cougar?
Plus-sizing (larger rim, lower aspect) is possible within ±3% of the OEM overall diameter per the ETRTO safe-fit standard. The Compatible alternative sizes table on this page lists every safe option for the OEM size. Always confirm with the manufacturer or a qualified tire shop before deviating from the placard.
Where can I buy tires for my 1991 Mercury Cougar?
Online tire retailers in our affiliate network carry every size documented for this vehicle. Use the Shop online buttons above to compare prices across them; variance of $20–$40 per tire is common between merchants. The <a href="/tools/tire-install-cost-calculator/">install cost calculator</a> estimates the out-the-door including mount, balance, TPMS, and disposal by state.
What is the recommended tire pressure for the 1991 Mercury Cougar?
The cold-inflation pressure is printed on the driver-door placard of your specific vehicle and varies by trim, tire size, and loaded vs unloaded condition. Typical OEM front and rear pressures fall between 30 and 36 psi for passenger trims and 32–40 psi for SUV/truck variants, but the placard is the authoritative source.
Can I fit winter tires in a different size on my 1991 Mercury Cougar?
Yes; the standard winter-tire fitment pattern is one width step narrower than OEM (e.g. 225 → 215) with the aspect ratio bumped up to preserve overall diameter. Narrower tires increase contact pressure on snow for better traction. The Compatible alternative sizes table includes any winter-friendly options that fall within ±3% OD for this vehicle.
How often should I rotate the tires on my 1991 Mercury Cougar?
Every 5,000–7,500 miles is the typical OEM recommendation for passenger vehicles. AWD vehicles and high-torque trucks benefit from the shorter interval. Documented rotation history is also a tire-warranty prerequisite; most manufacturer treadwear claims require rotation receipts at the warranty inspection.

For broader tire questions; replacement timing, UTQG, EV-specific tires, winter swaps; see the tire FAQ.

Sources for this page

  1. Vehicle owner's manual tire & wheel placard; door-jamb placard on the Mercury Cougar is the authoritative source for OEM tire size, load index, and cold-inflation pressure for your specific trim.
  2. NHTSA SaferCar; recall lookup for the 1991 Mercury Cougar.
  3. ETRTO 2024 Standards Manual §2.3; overall-diameter math used for the alternative-size verdicts above.
  4. Tire & Rim Association 2025 Yearbook; load-index to maximum-load reference.

Last verified 2026-09-02.