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Nitto Ridge Grappler
Choose the Nitto Ridge Grappler 37X13.50R18 LT 124Q D2 BSW, a hybrid terrain tire built for drivers who want aggressive off-road looks, capable dirt and gravel traction, and a quieter ride than many traditional mud-terrain tires. This 37X13.50R18 Ridge Grappler is a popular 37-inch flotation fitment for select Ram 2500, Chevrolet Silverado 2500HD, GMC Sierra 2500HD, Ford F-350 Super Duty, Ram 3500, Ford F-250 Super Duty models, plus similar trucks and SUVs using 18-inch wheels.
Why choose the Nitto Ridge Grappler in 37X13.50R18?
Built for lifted heavy-duty trucks, full-size off-road builds, and high-clearance custom rigs: The 124Q D2 rating gives this size light-truck strength for off-road use while keeping daily drivability in focus.
Hybrid terrain performance: The Ridge Grappler blends all-terrain road manners with mud-terrain-inspired bite for drivers who split time between pavement, job sites, trails, gravel roads, and weekend adventure.
Quiet, comfortable road manners: Nitto's hybrid tread design is engineered to reduce pattern noise while still giving the tire an aggressive stance on trucks, Jeeps, and SUVs.
Confident off-road traction: Alternating shoulder grooves, staggered shoulder lugs, and deep sidewall lugs help the tire grab loose terrain and add durability-minded sidewall presence.
Rugged truck styling: The Ridge Grappler gives daily-driven pickups and lifted builds a bold look without giving up the on-road usability many drivers need during the week.
Popular vehicle fitments for 37X13.50R18 Nitto Ridge Grappler
This tire size is commonly used on select trims or modified fitments of the Ram 2500, Chevrolet Silverado 2500HD, GMC Sierra 2500HD, Ford F-350 Super Duty, Ram 3500, and Ford F-250 Super Duty. It is also a strong option for similar pickups, Jeeps, SUVs, and lifted builds that use the same tire size, load rating, speed rating, and wheel diameter.
Size and rating details
37X13.50R18: This size is designed for 18-inch wheels and helps shoppers match an original, plus-size, or lifted truck fitment.
124Q D2: The service description and load range identify the tire's load capability and intended truck or SUV use.
BSW: This version uses black sidewall styling for the finished look on the vehicle.
Frequently asked questions
What type of tire is the Nitto Ridge Grappler 37X13.50R18?
The Ridge Grappler is a hybrid terrain truck tire, combining an aggressive off-road tread style with more refined highway comfort than a dedicated mud-terrain tire.
Is the Nitto Ridge Grappler 37X13.50R18 good for daily driving?
Yes. It is designed for truck and SUV owners who want bold off-road traction and styling while still driving on pavement, highways, and local roads every day.
What vehicles use the Nitto Ridge Grappler 37X13.50R18?
Popular applications include select Ram 2500, Chevrolet Silverado 2500HD, GMC Sierra 2500HD, and Ford F-350 Super Duty models, along with comparable vehicles using the same size, load range, and speed rating.
UNIFORM TIRE QUALITY GRADE (UTQG)Uniform Tire Quality Grade
| SECTION WIDTH Measures the width of the tire from sidewall to sidewall, which is mounted on a wheel and inflated. | 37 |
| ASPECT RATIO Determines the sidewall height of the tire, based on the width. | 13.5 |
| RIM DIAMETER Measures the rim size from top to bottom (in inches). | 18" |
| OVERALL DIAMETER Measures the tire height from top to bottom when mounted on a wheel and inflated. | 36.77" |
| RIM WIDTH RANGE The approved range of rim widths this tire can be safely mounted on. | 9.0" - 11.5" |
| WEIGHT The weight of the tire measured in pounds (weight of tire only). | 90 LBS |
| TREAD DEPTH Measured in /32 of an inch to determine the height of the tread block from top to bottom. | 18/32" |
| LOAD INDEX Determines the weight a tire can carry at maximum air pressure. See load Index chart. | 124 |
| LOAD RANGE Determines the ply rating of the tire. Should be replaced with the same or higher rating. | D2 |
| MAX PSI The max psi is the highest pressure the tire can hold, but should be inflated to your vehicle specifications not exceeding this amount. | 50 PSI |
| SPEED RATING Designation from laboratory testing to determine the maximum speed the tire can travel. Maintain the same speed rating or higher for replacement. | Up to 100 mph |
| SIDEWALL DESC. The sidewall designation to describe the lettering on the sidewall. | Black Side Wall |
| VPN Vendor Product Number | 217390 |
| GTIN Global Trade Item Number | 4981910503910 |
Customer Reviews
Best tires I’ve ever had. That’s why I’ve had them on 2 trucks. I haul a 40’ fifth wheel at 14,500 lbs and the tires handle it well.
These tire have felt the best while towing my tractors.
Great tires