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Castlerock
Castlerock ST205/75R15
Castlerock ST205/75R15
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Shop the Castlerock 205/75R15 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.
What 205/75R15 means
In the size 205/75R15, 205 is the section width in millimeters (8.07 in), 75 is the aspect ratio — the sidewall stands 75% as tall as the tire is wide, or 153.8 mm (6.05 in) — R denotes radial construction, and 15 is the wheel diameter in inches. That works out to an overall diameter of about 27.11 inches, turning roughly 744 revolutions per mile. Overall diameter is what matters for speedometer accuracy and clearance when you change sizes, so compare it — not just the width — against your current tire.
The service description on this tire decodes to a load index of 105 — a maximum load of 2,039 lbs per tire. The speed symbol L corresponds to a maximum sustained speed of 75 mph.
Specifications
| Size | ST205/75R15 |
| Service Description | 105L |
| Load Index | 105 |
| Speed Rating | L |
| Section Width (mm) | ST205 |
| Aspect Ratio | 75 |
| Temperature Grade | TIRE RIM DIAMETER=15TIRE TYPE=TRACTION=TREAD WEAR=TREAD DEPTH=UQTG=WARRANTY= |
Frequently asked questions
How fast does this tire ship?
Every order at ThreePiece.us ships free, with fast delivery from a nationwide warehouse network. Affirm financing is available at checkout.
What does 105L mean on the Castlerock?
105L breaks down as load index 105 — rated for 2,039 lbs per tire — with an L speed rating, good for a maximum sustained 75 mph.
Will 205/75R15 tires fit my vehicle?
Check the size molded into your current tire's sidewall or the tire placard inside the driver's door jamb — if it reads 205/75R15, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right.
Keep shopping
Browse Castlerock tires, or view all tires at ThreePiece.us.
- BRAND:
- Castlerock
- SIZE:
- ST205/75R15
- ASPECT RATIO:
- 75
- LOAD INDEX:
- 105
- SECTION WIDTH:
- ST205
- SERVICE DESCRIPTION:
- 105L
- SPEED INDEX:
- L
- TEMPERATURE:
- TIRE RIM DIAMETER=15TIRE TYPE=TRACTION=TREAD WEAR=TREAD DEPTH=UQTG=WARRANTY=
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