Write a Review
Mastercraft
Mastercraft MSC Courser MXT LT305/55R20/10
Mastercraft MSC Courser MXT LT305/55R20/10
📧 Get Fitment Help
Verify parts fit & get product recommendations
Lease-to-own for as low as
/week
Get Started
Guaranteed to Fit — confirm your size with the fitment checker on this page
Price Match Guarantee Learn More
Free Mount & Balance
Free Shipping
OUT OF STOCK 
📧 Get Fitment Help
Verify parts fit & get product recommendations
Shop the Mastercraft Courser MXT 305/55R20 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.
What 305/55R20 means
In the size 305/55R20, 305 is the section width in millimeters (12.01 in), 55 is the aspect ratio — the sidewall stands 55% as tall as the tire is wide, or 167.8 mm (6.60 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 33.21 inches, turning roughly 607 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 manufacturer lists the overall diameter of this specific tire as 20 inches — when clearance is tight, go by the published figure rather than the nominal size math.
The service description on this tire decodes to a load index of 118 — a maximum load of 2,910 lbs per tire. The speed symbol Q corresponds to a maximum sustained speed of 99 mph.
Load Range E corresponds to a 10-ply rating.
Specifications
| Size | LT305/55R20/10 |
| Tire Type | Mud Terrain |
| Service Description | 118Q |
| Load Index | 118 |
| Speed Rating | Q |
| Load Range | E (10 Ply) |
| Section Width (mm) | 305 |
| Aspect Ratio | 55 |
| Overall Diameter (in) | 20 |
| Tread Depth (/32") | 19.5 |
Frequently asked questions
Will 305/55R20 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 305/55R20, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 305/55R20 tire in stock to compare options.
What does 118Q mean on the Mastercraft Courser MXT?
118Q breaks down as load index 118 — rated for 2,910 lbs per tire — with a Q speed rating, good for a maximum sustained 99 mph.
What kind of tire is the Mastercraft Courser MXT?
The Mastercraft Courser MXT in 305/55R20 is a mud terrain tire.
Keep shopping
Shop all 305/55R20 tires, see every Mastercraft Courser MXT size, explore mud terrain tires, or view all tires at ThreePiece.us.
- BRAND:
- Mastercraft
- Model:
- MSC Courser MXT
- Size:
- LT305/55R20/10
- Aspect Ratio:
- 55
- Load Index:
- 118
- Load Range:
- E (10 Ply)
- Section Width:
- 305
- Service Description:
- 118Q
- Speed Index:
- Q
- Temperature:
- N/A
- Tire Rim Diameter:
- 20
- Tire Type:
- Mud Terrain
- Traction:
- N/A
- Tread Wear:
- N/A
- Tread Depth:
- 19.5
- UQTG:
- N/A
- Warranty:
- N/A
PRODUCT REVIEWS (0)
Overall Rankings
Have you tried this product?
WRITE A REVIEWNo reviews for this product yet. Be the first to write a review!
Write a Review