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Castle Rock ST205/75R15 Radial Trailer Tire w/ 15" Silver Mod Wheel - 5 on 4-1/2 - Load Range C

Castle Rock ST205/75R15 Radial Trailer Tire w/ 15" Silver Mod Wheel - 5 on 4-1/2 - Load Range C

Item # LHACK121
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Our Price: $199.77
Trailer Tires and Wheels
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Shipping Weight: 39 lbs
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Radial tire has a 6-ply rating and a 1,820-lb max load at 50 psi. 15" x 5" Steel wheel has a 5 on 4-1/2 bolt pattern. Nitrogen fill maintains tire pressure. 1-Year No Excuses Guarantee on tire. Complimentary roadside assistance included. Lowest Prices for the best trailer tires and wheels from Castle Rock. Castle Rock ST205/75R15 Radial Trailer Tire w/ 15" Silver Mod Wheel - 5 on 4-1/2 - Load Range C part number LHACK121 can be ordered online at or call 1-800-940-8924 for expert service.
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Castle Rock Trailer Tires and Wheels - LHACK121

  • Tire with Wheel
  • 15 Inch
  • 5 on 4-1/2 Inch
  • 205/75-15
  • Load Range C
  • Steel Wheels - Powder Coat
  • Radial Tire
  • L - 75 mph
  • Castle Rock

Radial tire has a 6-ply rating and a 1,820-lb max load at 50 psi. 15" x 5" Steel wheel has a 5 on 4-1/2 bolt pattern. Nitrogen fill maintains tire pressure. 1-Year No Excuses Guarantee on tire. Complimentary roadside assistance included.


  • Tire-and-wheel assembly is ideal for RVs, campers, and trailers
  • Nitrogen fill maintains tire pressure longer than standard air
    • Helps prolong the life of the tire and wheel
  • Sturdy steel wheel with modular design
    • Silver powder coat finish over e-coat primer resists rust
  • Beveled stud holes help to keep wheel securely in place on trailer hub
    • Eliminate the need for constant retightening of lug nuts
  • Castle Rock radial tire is constructed with double steel belts and double nylon plies
    • Nylon tread-firming belt overlays help prevent tread separation
    • Tread wear indicator (TWI) makes it easy to see tread depth
    • Radial ply tire is great for highway use
  • Siping on the tire tread channels water away from the tire to improve traction during wet, snowy, or icy conditions
  • Special trailer (ST) tire has sturdy sidewalls so that it can handle heavy loads
    • Created specifically for trailers and not intended for use on other vehicles
  • Complimentary roadside assistance for 2 years
    • Flat tire service available 24/7 anywhere in the United States, Canada, or Puerto Rico
  • Assembly meets DOT specifications
    • Tire meets FMVSS specifications
    • Wheel meets SAE J1204 standards
  • Center cap sold separately


  • Rim dimensions: 15" diameter x 5" wide
  • Bolt pattern: 5 on 4-1/2"
  • Wheel bolt size: 1/2"-20
  • Wheel capacity: 1,870 lbs
  • Pilot diameter: 3.19"
  • Offset: 0
  • Tire size: ST205/75R15
    • Section width: 7.99"
    • Outer diameter: 27.12"
  • Tire capacity:
    • Load range: C
    • Ply rating: 6
    • Maximum load: 1,820 lbs at 50 psi
  • Tread depth: 9/32"
  • Maximum speed: 75 mph (speed rating L)
  • Warranty:
    • 5-Year on tire
    • 1-Year on wheel
  • 1-Year No Excuses Guarantee on tire

Lionshead Roadside Assistance Program

This tire-and-wheel assembly comes with complimentary roadside assistance for 2 years. If your RV or trailer has a flat tire, call the help line and a technician will come change the flat for you. You can call 24 hours a day, 7 days a week, and 365 days a year from anywhere in the United States, Canada, or Puerto Rico.

1-Year No Excuses Guarantee

This tire has a 1-year No Excuses Guarantee. If within the first 12 months the tire is damaged in any way that's not covered by warranty, it will be replaced at no charge. You will also be compensated a flat labor rate for the cost of mounting the replacement tire.

The Nitrogen Advantage

Nitro Fill Logo

The NitroFill inflation process filters out oxygen to ensure that this tire-and-wheel assembly is filled with 95 to 99.9 percent pure nitrogen. Nitrogen-inflated tires maintain pressure better than tires inflated with standard air. This makes them ideal for RVs and trailers that are driven infrequently or sit in storage for long periods of time. Other benefits of consistent tire pressure are better fuel economy, improved braking and handling, decreased chance of tire failure, and longer tire life.

A tire inflated with standard air, which contains oxygen, is prone to fluctuations in pressure due to loss of air over time and ambient temperature changes. Nitrogen-inflated tires don't experience these fluctuations for a couple reasons. First, nitrogen molecules are larger than oxygen molecules, so they are less likely to permeate a rubber tire. Second, nitrogen is a dry gas, so it won't allow condensation to build inside the tire. A tire inflated with standard air may have moisture in it, which means it is more likely to be affected by ambient temperature.

In addition, the moisture that can collect in a tire inflated with standard air will contribute to corrosion of the wheel and deterioration of the rubber tire from the inside out. A nitrogen-inflated tire-and-wheel assembly is less likely to experience this type of decay. Less moisture in the tire also means reduced running temperatures.

If necessary, you can top off the tire with standard compressed air. But to maintain the benefits of nitrogen, the tire must be refilled with nitrogen.

Beveled Stud Holes

Beveled Stud Holes Front and Back

The stud holes on this steel wheel are beveled to ensure that the wheel stays tight against your trailer hub. This also eliminates the need to constantly retorque the lug nuts.

Castle Rock Radials

Castle Rock Radial Tread

Unlike standard trailer tire tread, which has solid, continuous ribs, the tread on these Castle Rock radials has ribs with breaks. These breaks allow water to run off to the sides. The Castle Rock tread also has sipes. Siping is a process in which thin grooves (or sipes) are cut into the rubber of the tire. The grooves channel water away from the tread so that the tire makes better contact with the road. Both of these features greatly improve traction during wet, snowy, or icy conditions.

Castle Rock radials are constructed with double steel belts and double nylon cords. A protective layer of nylon is wrapped around the steel belts to help prevent tread separation.

Radial Tires vs. Bias Tires

Radial tire vs bias tire graphic

Radial ply tires are designed for trailers that are towed on the highway. The cords on a radial tire are positioned at a 90-degree angle to the direction of travel so that they lay across the width of the tire from wheel lip to wheel lip. This construction prevents the cords from rubbing against one another when the tire flexes, unlike the cords on a bias ply tire. As a result, radial tires have less rolling resistance and heat buildup, which leads to a longer tread life and improved steering at higher speeds.

Determining the Bolt Pattern

The first number in the bolt pattern is the number of bolt holes. The second number denotes the diameter, in inches, of the circle on which the bolt holes sit.

Bolt Pattern - Odd

To determine the bolt-circle diameter on wheels with an odd number of bolt holes, measure from the center of any bolt hole to the point halfway between the two bolt holes directly across from the first. (Example: "5 on 4-1/2" means 5 bolt holes with 4-1/2" measured to a point halfway between the opposite bolt holes.)

Bolt Pattern - Even

On wheels with an even number of bolt holes, measure from the center of one bolt hole to the center of the hole directly across from it. (Example: "8 on 6-1/2" means 8 bolt holes with 6-1/2" from the center of one hole to the center of another on the opposite side.)

Bolt Pattern - Side

Measuring the distance from the center of one bolt hole on the wheel to the center of a bolt hole right next to it can also help to determine the bolt pattern.

  • If D = 2-5/8", then the bolt pattern is 5 on 4-1/2"
  • If D = 2-3/4", then the bolt pattern is 5 on 4-3/4"
  • If D = 3", then the bolt pattern is 5 on 5"
  • If D = 3-1/4", then the bolt pattern is 5 on 5-1/2"

ACK121 Lionshead Castle Rock ST205/75R15 Radial ST Tire with 15" Silver Modular Rim - 5 on 4.5 - LR C

Alternative part number: A-HZCR-205RC-IWMO-150-500-5SIL

Replaces A-HZCR-205RC-TMMO-150-500-5SIL, A-HZCR-205RC-NBMR-150-500-5SIL, A-HZCR-205RC-JGMR-150-500-5SIL, A-HZCR-205RC-JGMO-150-500-5SIL. and A-HZCR-205RC-UNMO-150-500-5SIL

Customer Reviews

Castle Rock ST205/75R15 Radial Trailer Tire w/ 15" Silver Mod Wheel - 5 on 4-1/2 - Load Range C - LHACK121

Average Customer Rating:  4.9 out of 5 stars   (209 Customer Reviews)

Radial tire has a 6-ply rating and a 1,820-lb max load at 50 psi. 15" x 5" Steel wheel has a 5 on 4-1/2 bolt pattern. Nitrogen fill maintains tire pressure. 1-Year No Excuses Guarantee on tire. Complimentary roadside assistance included.


Great company!
Just bought a 2009 Forest
River Wildwood Travel Trailer.
Locating, ordering and delivery of your tire was never faster or more efficient!
I know this sounds like a solicited review, but I assure you, it’s legit.
I will definitely use this site, again
Thank you, kindly


Well, I bought the tires and rims as spares in the event of primary failures. Fortunately I have not had to fall on those reserves but, with that my purchases there of have been holding up and held up well with the mounts and gear from etrailer.


I ordered a tire for my work trailer and waited 5 days to only get a wrong tire for my trailer … been out of work for 5 days and waiting for a tire that I didn’t order … ordered an St 205 and they sent me a st225.

Thank you for reaching out. Our customer service team should be reaching back out to you in the near future.
-- Etrailer Expert Brooke M - 05/06/2022


Purchased a spare tire to go with the etrailer spare tire mount for my angle iron trailer. Purchased for security should a tire fail. Wanted to keep the tires and spares the same for aesthetics. Wheel is without any scratches, inflated and ready to go! Thank you etrailer. Tire was out of stock at the time of purchase. I was contacted about an in stock option. I opted out to get the same combo I have but I appreciated the offer. Only took two weeks anyhow.


Acceptable price and quality looks great! Quick turnaround from placing order to arrival of product. We had a blowout heading to our latest camping trip and nobody in the area had a replacement. The quick turnaround from the etrailer team was greatly appreciated because we had to have the spare before heading back home.


Wheel offset was correct. Wheel finish was excellent. Delivery was prompt.


Purchased for a spare on my trailer. Seems to be very good, and was a good price.


Delivery was delayed due to supplier issues. Customer service did an excellent job keeping me informed and delivered promptly when product was back in stock. Price was best I could find, quality was exactly what I expected!


Hi Alex, thank you for great, friendly service ! Momentarily, i thought i was back in Mayberry. Your thoughtful efficiency is appreciated. Thanks to you and Willy Nelson, "on the road again". mark


Sent to wrong house

I will have our customer service team reach out to you.
-- Etrailer Expert Jenny N - 02/28/2022


It’s round and big and out there.


I was glad to find these trailer tires and the size that I need. Thank you all very much.


From first impressions the product seems to fit my needs for a spare tire on my enclosed trailer perfectly. Quality of the paint on the rim is very good and tire specs are spot on. That’s why I continue to use etrailer as my go to provider for this type of product.


We are very pleased with order, shiooing and direct contact from the company. Highly recommend!


Matches my trailer wheels exactly


Bought this tire in rim for a spear on a cargo trailer.. Paint on rim match the others perfectly overall looks pretty good quality shipping and price with excellent and customer service was fantastic thank you for answering all my questions to make sure I got the right product ...


Great price,fast shipping,,


Matches our new trailer wheels, it's a spare, I hope I never have to use it.


I have been using etrailer for all my trailer needs as always fast shipping, excellent product and most of all great support.


well constructed hitch also installation was a breeze 15 minutes total time with spare tire already removed thanks to the previous post I also used a 5 gallon bucket to rest a hitch on while installing great price great shipping great customer service ty


Very happy with this spare tire. Looks good, great quality. Shipping was fast, ordering was easy. Good price ...


As always, a pleasure to do business with and great products


Product was exactly what I ordered. Appears to be great quality, and the price was fair. Very Satisfied.



great prompt service at a good price

Show More Reviews

Ask the Experts about this Castle Rock Trailer Tires and Wheels

  • Backspacing of Castle Rock Trailer Wheel and Tire part # LHACK121
    Since the Castle Rock Trailer Wheel and Tire part # LHACK121 has a section width of 8 inches and a zero offset the backspacing would be 4 inches.
    view full answer...
  • Correct Wheel/Tire Size for Cargo Pro Trailer
    I don't have any sure fire way to know what size tires or bolt pattern a Cargo Pro Trailer uses nor do I think they all use the same size but in order to confirm you simply need to count the number wheel bolts and look for the listed size on the sidewall of the existing tire. There should be a load range rating as well which will be needed to confirm an exact fit. The Castle Rock ST205/75R15 Radial Trailer Tire w/ 15" Silver Mod Wheel - 5 on 4-1/2 - Load Range C Item # LHACK121 uses five...
    view full answer...
  • Recommendation For Spare Tire 205/75R15 For Utility Trailer With Mount
    For the utility trailer I recommend the Castle Rock ST205/75R15 Radial Trailer Tire w/ 15" Silver Mod Wheel - 5 on 4-1/2 - Load Range C Item # LHACK121. This tire is of radial construction for great highway manners. It is filled with Nitrogen to help maintain the correct pressure as it will not leak down as easily as basic air. You can add air from a regular compressor if the air pressure does lower. It will not hurt it to not be topped off with nitrogen. The etrailer Spare Tire Carrier...
    view full answer...
  • Replacement Wheel and Tire for a 2007 Extreme Mega Lite 21bt Toy Hauler
    A 2007 Extreme Mega Lite 21bt Toy Hauler has a 5 on 4-1/2 lug pattern. The Castle Rock ST205/75R15 Radial Trailer Tire w/ 15" Silver Mod Wheel item # LHACK121 would be a great replacement. It has a 5 on 4-1/2 lug pattern and is a Load Range C.
    view full answer...
  • Spare Wheel/Tire and Mount for a 2020 Coleman Lantern LT 274BH
    In order to choose the correct spare wheel/tire for a 2020 Coleman Lantern LT 274BH we first need to know the tire size and load range. The tire size is listed on the sidewall of the tire along with the load range which should be LRC for load range c or LRD for load range d. I see you were looking at 205/75-15 tires so if that is what you have then the Castle Rock ST205/75R15 Radial Trailer Tire w/ 15" Silver Mod Wheel part # LHACK121 is what I would use if you have load range c tires or...
    view full answer...
  • Recommended Tire and Wheel for Spare to Best Match ST205/75D15 Tires with Dexstar Wheels
    The most common bolt pattern for your wheel and tire size is the 5 on 4-1/2 inch. I'm not sure if you have a color you wanted to match, but based on your given capacity the tire is Load Range C so here are my recommendations for your spare. Black=Kenda Loadstar ST205/75D15 Bias Trailer Tire w/ 15" Black Mod Wheel # AM3S664DX Silver=Castle Rock ST205/75R15 Radial Trailer Tire w/ 15" Silver Mod Wheel # LHACK121 White=Castle Rock ST205/75R15 Radial Trailer Tire w/ 15" White Mod Wheel # LHACK120 The...
    view full answer...
  • Availability of 205/75R15 Size Tire with Nitrogen Fill
    Yes, the Westlake/Lionshead tire and wheel combinations are the only ones that we currently have which have the Nitrogen fill. We have the 205/75R15 with a Load Range C (1,820 lbs at 50 psi) and come on a wheel with a 5 on 4-1/2" bolt pattern like the Taskmaster Contender # AC15R45WMQ that you referenced. We also have the Castle Rock # LHACK121, which comes on a Silver Mod wheel and has the Load Range C with a 5 on 4-1/2" bolt pattern and use the Nitrogen fill that you asked about. We...
    view full answer...
  • Spare Wheel and Tire Recommendation for 2018 Coleman 274bh with Tire Size 205/75-15 Tire
    To pick out the correct wheel and tire for your 2018 Coleman 274 BH that requires the tire size 205/75R15 will require you to first determine the bolt pattern of the wheels since there are several bolt pattern options for 15 inch wheels. I attached to help articles. One that shows how to determine what bolt pattern you have and then another that shows all of the 15 inch wheel and tire combos we have that have the tire size 205/75-15 which you can then pick your bolt pattern from the filters...
    view full answer...

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Info for this part was:

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Expert Research:
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Written by:
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