Store Address
1856 E Main St
Cortez, CO 81321

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4.8 /5
39 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.


Nov 18, 2017
On the way to Atlanta Ga found out my tire had a slow leak was looking for a tire shop this shop came up with good reviews ...we had a spare tire in my car the put it on for free didn't charge...tried to pay they still didn't want the money ...thank you for helping us get back to Atlanta safely
Business Owner replied on Nov 20, 2017:
Valerie, thank you for taking the time to let us know about your experience! We hope that you have a great day!
Spencer Smith, Owner
Oct 11, 2017
These guys are awesome, great service, straight talk, good prices.
Business Owner replied on Oct 14, 2017:
Thanks, Chris! We always love to receive great feedback. We'll pass your comments on to the team! Hope to see you soon!
Spencer Smith, Owner
Jul 14, 2017
We are from Kentucky and were on vacation when we picked up a nail in our tire. Stopped in at Big O and the staff was excellent! Very friendly, helpful and fast! They got us back on the road for a very fair price!!
Thank you!!!
Business Owner replied on Jul 14, 2017:
Thanks, Brad! We are so happy that we were able to help you out in a time of need. We hope that you have a great day!
Spencer Smith, Owner
Jun 15, 2017
Stopped in while on a six week road trip with my family from Pennsylvania. We were having problems with brakes on my van. Nolan greeted us and was very professional and friendly. They immediately pulled the tires to check things out and made a minor adjustment and didn't charge us anything. Thanks for your outstanding service and kindness to us!
Business Owner replied on Jun 15, 2017:
Brian, this is great information to share with the team. Hope to see you soon!
Spencer Smith, Owner
Jun 2, 2017
Thousands of miles from home I took my RV in for a noise in the front end. Turned put to be a cracked brake rotor. Adam and the guys took care of us like family. Super professional team, wish they were in Florida so they could be my go to guys.
Thanks Again
Scott, Wilma and Benji
Business Owner replied on Jun 4, 2017:
Thanks, Scott! Hope to see you soon!
Big O Tires - Cortez, CO
May 9, 2017
I wanted to say THANK YOU to you and the rest of the team there at the Big O Tires store in Cortez CO.

I was very impressed that your team took what feels like a personal interest in this project to install new wheels on my 2017 Subaru WRX.

I noticed lots of little things. For example, I noticed they took time to clean up the wheels after they were put on. I noticed they used rags to make sure the wheels didn't get scratched up. They set the wheels down on cardboard instead of setting them on the cement. I could go on and on.

I got there at 5:00 PM which was a full 1 hour before closing. I don't think I left until 6:30 PM which means I kept them late. They didn't complain about having to stay late. In fact, they seemed to be a little excited. I appreciate their willingness to see the job thru to the end.

I know you and the rest of the team work on tires and wheels all day so it may be just another day at work, but I was very excited to get the new wheels on my car. It was a special occasion for me and their enthusiasm was noticed and appreciated.

They were both professional and made me feel good as a customer.

Most people will only take the time to say something if there is a problem that needs to be resolved. In this case, I wanted to say THANK YOU from a very happy customer. It is experiences like this that will make me a repeat customer and recommend the Big O Tires store in Cortez to my friends and family. :)

Keep up the great work! :)
Business Owner replied on May 9, 2017:
Thanks, Anthony, for taking the time to share your thoughts! We really appreciate your feedback! Hope to see you soon!
Big O Tires - Cortez, CO
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.