*Tread pattern & sidewall design may vary from pictures

RoadRider IV ST

91/87L, C (6 Ply)
  • All SeasonAll Season
  • HighwayHighway

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MSRP $77.75
Total for 4: $251.96
You save $14.76 (19%)
In Stock (10+)
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Tire Specifications

  • SKU N999394-99
  • Season All Season
  • Sidewall BSW: Black Side Wall
  • Type Trailer
  • Aspect Ratio 80
  • Size 175/80R13
  • Load Range¡The load range designating the durability of the tire’s internal structure.C (6 Ply)
  • Brand RoadRider
  • Load Index¡A load index is a number that represents the load durability of each tire.91/87
  • Tread Depth9/32
  • Performance¡The performance categorizes the tire’s speed and terrain traction and durability. Highway
  • Section Width 175
  • MPN 425817-99
  • Run Flat¡Run flat tires offer a 50-mile, 50-mph performance after air pressure loss. No
  • Model IV ST
  • Speed Rating¡A speed rating is a letter designating the tire’s utmost high speed durability. L
  • Rebate Available No
  • Rim Diameter 13
  • Overall Diameter 24


RoadRider IV ST


  • Enhanced controllability
  • Longer-lasting tread life
  • Upgraded load durability


The RoadRider IV ST is a highway terrain, all season tire made for trailers. This tire is NOT MEANT TO BE MOUNTED ON LIGHT TRUCKS, as its construction will not support the weight and performing style of such vehicles. It can ONLY BE MOUNTED ON TRAILERS.

The ribbed tread pattern manages to keep consistent road contact during the performance. It improves steering responsiveness and driving stability. The steering response time becomes faster and more accurate to the towing vehicle’s commands, while the structure is secured against the driving pressure affecting it. At the same time, the shoulder blocks strongly grip the road surface, upgrading maneuvering. As a result, this tread design and close road contact guarantee a safe driving experience.

The optimal tread design and compound also prevent irregular and premature wear formations, for longer-lasting tread life. In this manner, the ribbed tread design evenly distributes driving pressure along the tread area, while the rubber compound slows the treadwear rate down. This tread design and durable rubber compound boost the tire’s service life and usability for a longer period of time.

The RoadRider IV ST also offers excellent load and driving durability. The strengthened internal structure and durable durable rubber compound work together to keep the optimal tire shape under load and driving pressure. This construction does not allow the tire to deform under pressure, which enables it to carry and withstand heavy loads. In this manner, the load-carrying capacity is improved, which makes this model an excellent choice for trailers.

Below is a list of some popular vehicles that 175/80R13 tires may fit depending on Year & Option. However the list does not cover all vehicle's that these tires can fit:

  • Buick Skyhawk Custom
  • Buick Skyhawk Limited
  • Buick Skyhawk Sport
  • Chevrolet Cavalier
  • Chevrolet Cavalier CL
  • Chevrolet Cavalier CS
  • Chevrolet Cavalier Cadet
  • Chevrolet Cavalier Olympic
  • Dodge Aries
  • Dodge Aries America
  • Dodge Aries Custom
  • Dodge Aries LE
  • Dodge Aries SE
  • Ford EXP
  • Ford EXP GT
  • Ford EXP HO
  • Ford EXP Luxury
  • Ford EXP Sport
  • Ford Escort
  • Ford Escort GL
  • Ford Escort GLX
  • Ford Escort GT
  • Ford Escort L
  • Ford Escort LX
  • Ford Escort Pony
  • Ford Tempo
  • Ford Tempo GL
  • Ford Tempo GLX
  • Ford Tempo L
  • Ford Tempo LX
  • Mercury LN7
  • Mercury LN7 Sport
  • Mercury Lynx
  • Mercury Lynx GL
  • Mercury Lynx GS
  • Mercury Lynx L
  • Mercury Lynx LS
  • Mercury Lynx LTS
  • Mercury Lynx RS
  • Mercury Topaz
  • Mercury Topaz GS
  • Mercury Topaz GS AWD
  • Mercury Topaz LS
  • Mercury Topaz LS AWD
  • Mercury Topaz Sport
  • Mercury Topaz Sport AWD
  • Oldsmobile Firenza
  • Oldsmobile Firenza Brougham LX
  • Oldsmobile Firenza Brougham SX
  • Oldsmobile Firenza Cruiser
  • Oldsmobile Firenza Cruiser LX
  • Oldsmobile Firenza Cruiser S
  • Oldsmobile Firenza Cruiser SX
  • Oldsmobile Firenza ES
  • Oldsmobile Firenza GT
  • Oldsmobile Firenza LC
  • Oldsmobile Firenza LX
  • Oldsmobile Firenza S
  • Oldsmobile Firenza SX
  • Plymouth Reliant
  • Plymouth Reliant America
  • Plymouth Reliant Custom
  • Plymouth Reliant LE
  • Plymouth Reliant SE
  • Pontiac J2000
  • Pontiac J2000 LE
  • Pontiac J2000 SE
  • Pontiac J2000 Sunbird
  • Pontiac J2000 Sunbird LE
  • Pontiac J2000 Sunbird SE
  • Pontiac Sunbird
  • Pontiac Sunbird GT
  • Pontiac Sunbird SE


Shipping Information


If an order is placed before 1 pm EST on a business day we ship the order the same day.

If it is placed after 1 pm EST or over the weekend, we will ship the order out the following business day. Depending where you are located in the 48 contiguous states FedEx will take approximately 1-6 business days to deliver the tires to you from any of our three main warehouses located in Pennsylvania, Texas, and Florida and/or our smaller warehouses which are located across the country.

As the COVID-19 pandemic continues to disrupt the supply chain network, we're doing everything within our power to ensure orders are shipped as quickly as possible. However, despite our best efforts, shipping and delivery times may change unexpectedly. Please check your Order Status for the most current estimate of the shipping time. Thank you for your patience and understanding.

For a more specific time frame contact us via e-mail or telephone 1-866-440-0177.

Compatible Vehicles

IMPORTANT INFORMATION: Please note this is Original Equipment (O.E.) tire size only. The O.E. size is determined by the year, make, model and options of the vehicle. Original Equipment size data is the best information we currently have available to us. Priority Tire LLC is not responsible for fitment errors. The most important aspect of purchasing a tire is its size, which cannot vary. It is buyer's responsibility to verify the tire size information. It is buyer's responsibility to verify whether a specific tire is suitable for a specific vehicle. However, this tire size may be fitted on other vehicles as well. To ensure that you are purchasing the correct tire size for your vehicle, please check the size of your currently mounted tires (locate on the tire's sidewall). The tire's sidewall also features the speed and load rating, indicating the speed and load capacity of the specific tire. The speed and load index can differ from the tires you currently have mounted on your vehicle up to a degree. Please check your vehicle's Owner's Manual or consult with your mechanic regarding the changes of your tire's speed rating and load index. If you have any questions regarding your tire size , speed rating and load index please contact us prior to purchasing and confirm with certified auto technician of any variance in speed and load index and sizes.

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