Do Westlake ST235/75R15 CR857 Tires Need Changed at 10,000 Miles If They Still Look Good

Updated 03/31/2025 | Published 01/27/2024

Question:

I have a 2021 Forest River Ibex with Westlake ST235/75R15 CR857 tires. What is the expected mileage for these tires. I currently have about 10,000 miles on them. They look good with very little wear and now signs of any damage. I am going on another trip of about 7,000 miles. Should they be replaced before we go?

asked by: Mike S

Expert Reply:

Trailer tires have a lifespan of 5-6 years or 10,000-12,000 miles - whichever comes first. If you were going on a shorter trip I would say you can stretch them out a little more, but since you're almost doubling up their mileage and they are that close to the end of their lifespan I highly recommend replacing them so you can enjoy your trip without constantly thinking about and checking on the tires.

For a direct replacement of your Westlake CR857 tire you're looking for the Westlake ST235/75R15 Radial Off-Road Trailer Tire - Load Range D # WST54FR on our site.

I'm attaching a few FAQ articles on tire and trailer maintenance for your reference.

expert reply by: Jon G

Cindy

3/30/2025

Question I have a Forest River Timberwolfe 16 ml and will be traveling about 600 miles in October of this year. I bought it new it has been parked in the same spot for a year with skirting around it. Should I replace the tires before traveling?

Jon G.

3/31/2025

@Cindy If the tires are in good shape and aren't near the end of their lifespan (5-6 years or 10,000-12,000 miles - whichever comes first) then you don't need to swap them out. If you aren't sure and the tires look a bit rough, I recommend replacing them. Just let me know what size is indicated on the sidewall and I'll be happy to recommend a replacement for you!