Store Address
1856 E Main St
Cortez, CO 81321

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4.8 /5
33 reviews

Give Us a Call
(970) 565-3633

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Mon - Fri 7:00 AM - 6:00 PM
Saturday 7:00 AM - 5:00 PM
Sunday Closed

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Tire Services

  • Free Alignment Check With Printout
  • Free rotation with new tire purchase
  • Free Flat Repair With Tire Purchases
  • Free Air Pressure Checks Every Day (no appointments needed)
  • Everyday Low Price Tire Guarantee
  • Express Lane Tire Service (no appointments needed)
  • Big O® Tires Credit Card with 6-month, No-interest Financing

Other Services

  • Free Brake Inspection (no appointment needed)
  • Free 22-Point Vehicle Inspection (no appointment needed)
  • Free Battery & Electrical Check
  • Free 5-Minute Wiper Blade/Bulb Inspection
  • Free Local Shuttle Service
  • Complete Owner's Manual Scheduled Maintenance Services
  • And More!

* Services offered may vary by location.

Why choose Big O Tires Auto Service?

When it comes to having a car or truck serviced, most drivers have more questions than answers. Questions like "What is rotor resurfacing... and how much will it cost?" And "What on earth is that clunking sound?!" For many years, Big O Tires customers have trusted us to offer straight answers and top-notch services. Big O Tires offers a wide range of diagnostic, repair and routine maintenance services, backed by one of the best national services warranties in the business. Not sure when your vehicle's due for routine maintenance services? Drop by, and we'll look it up for you!

Check out our

Note: Any recommendations provided on are general in nature. Big O Tires recommends that you always consult your vehicle’s Owner’s Manual, the vehicle manufacturer or an associate at your local Big O Tires store for vehicle specific recommendations. The names and descriptions of services are general in nature. Actual service offerings vary by location, and not all stores offer all services! The availability of our oil change service and the use of Valvoline oil products varies depending on the Big O Tires location near you. Please contact a Big O Tires store near you to find out what services and oil products are offered.


Apr 17, 2017
I want to say that I appreciate the fact that no matter what was needed on my vehicle that no high pressure salesmanship was applied
Business Owner replied on Apr 17, 2017:
Thanks for the kind words! You really made our day. We look forward to seeing you soon!
Big O Tires - Cortez, CO
Apr 14, 2017
Business Owner replied on Apr 14, 2017:
Thanks, Justin! Hope to see you soon!
Big O Tires - Cortez, CO
Apr 12, 2017
I received a call when the job was completed. All went well.
Business Owner replied on Apr 12, 2017:
Thanks, Julia! We hope that you have a great day!
Big O Tires - Cortez, CO
Dec 28, 2016
I have never had a better experience buying tires and the warranty on my tires is excellent and highly useful. The management is courteous and pleasant to deal with. I look forward to buying tires from Big O for a long time.
Nov 15, 2016
As usual Spencer, the service is great. Happy that Jay is there for all of us
Nov 6, 2016
Always happy to deal with Nolan and Adam. Very professional and responsive to the needs of our dealership. Thank You.

Tom McConville
Sales Manager
Oct 4, 2016
I'm confident that they did a first class work on my truck.
Sep 29, 2016
Had tires rotated and balance, seem to to a good job, they just never call and let me know my vehicle is done!
Sep 20, 2016
Visiting Mesa Verde National Park and was towed to Big O's. Nolan was a great help and saved us time and money.Also herecommend a equally good shop to fix the ac compressor.Thank you!
Sep 17, 2016
Love my Big O Boys! They always take care of me and my girls!
Aug 24, 2016
I went to them a couple of days ago. It's was really fast service.
Aug 8, 2016
Very satisfied with there service I got tire rotation and balanced
Jun 2, 2016
Cortez Big O has rescued me a few times....they always get my car in right away and fix a flat or mount new tires. Wait times are pretty short overall.
May 23, 2016
Always go to them for both my rides. They do good work.
May 16, 2016
fast friendly and professional service great tire buying expeerience
Apr 11, 2016
I used Big O to have a tire put on my car and they were real fast.
Apr 7, 2016
When presented with a conundrum, a solution was offered by Adam which unraveled the mess.
Mar 27, 2016
I have come in 3 times in the last year because of a damaged tire. You always get my car right in to fix the problem...I really appreciate that because it's usually a pretty urgent situation. Thank you for that!
Mar 12, 2016
The guys at Cortez Big O did a great job installing my new tires. Thanks to Micah and the guys for taking good care of my truck.
Mar 12, 2016
The guys did a great job installing my new tires!!!!
Feb 22, 2016
Great service, friendly workers and trustworthy. This review system is getting complicated.
Feb 7, 2016
I got a set of 4 tires put on my wifes car in about 15mins. I didn't think that was possible.
Jan 18, 2016
I just dropped in asking about new tires. He went out in the freezing cold and measured and checked all my tires. Didn't have what I needed so ordered and they were here the next day. I took my car in at 7:00am and they had it ready much sooner than I expected. Great group of guys!
Jan 18, 2016
Have been using Big O in Cortez co. For years. Buy all my tires there. Fast friendly service. They do their best to match lowest prices in town.
Jan 13, 2016
Fast. Courteous. Good price. Car running perfectly now. Even a biscuit for the dog. Thanks!