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690 E 120th Ave
Northglenn, CO 80233


Store Address
690 E 120th Ave
Northglenn, CO 80233

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4.7 /5
189 reviews

Give Us a Call
(303) 457-1604

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Monday 6:30 AM - 6:00 PM
Tue - Fri 7:00 AM - 6:00 PM
Saturday 7:00 AM - 4:00 PM
Sunday Closed

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Tire Services

  • Free Alignment Check With Printout
  • Free Rotation & Re-balance With Tire Purchases
  • 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
  • Good/Better/Best Oil Change Options (with free top-off service)
  • 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!

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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.

Oct 15, 2016
I have been to many businesses with my vehicles and have been let down time and again. The Northglenn Big O is a business I can trust and treats me fairly.
Oct 13, 2016
I love customer service, the cost of the service is never up front and clear thus creating a mystery as to how much everything will be until they give you a phone call for approval.
Sep 30, 2016
Very knowledgeable staff and good value for what is fond.
Sep 26, 2016
I have used them for over 15 years and love their customer service. They always do a good job on fixing my car and I feel they are honest with the work that needs to be done.
Sep 23, 2016
Everybody that came in the door knew the managers names which means friendly, personal service. They took great care of my car for a great price. Locally owned and operated business.
Sep 19, 2016
I have taken my cars to this Big-O Tires store for years. I trust them.
Sep 19, 2016
No one knows when their autos will break down, I was towed in late but they took me in, found the problem and fixed it.
Sep 17, 2016
It's nice to have a place now where we can consistently take both our cars. I feel like they have great customer service and have been efficient with my time!
Sep 15, 2016
I am so happy with Big O, I have been taking my vehicles to them for many years.
They are easy to work with and very responsive. Quality at a reasonable price.
The best part is, I trust them.
Sep 13, 2016
My most recent visit for service on my vehicle was Sat. Sept. 10, 2016. Big O met and exceeded my expectations, and Jon Val and Chris were extremely Professional.
Sep 3, 2016
Very quick service. The staff made sure I was kept informed of what was going on with my car.
Sep 2, 2016
John was AWESOME, he evengave me a ride home while my car was being repaired.He truly went above and beyond and I sincerely appreciate it.
Aug 31, 2016
good service very helpfull when you ask a question
Aug 29, 2016
Jon is awesome with customers! He not only makes you feel like a valued customer but he also makes sure that you get the deals that are going on. My family has been going there for years and he is the reason why we keep coming. Keep up the great work!
Aug 29, 2016
Old (15+year) customer.Service keeps me coming back.
Aug 27, 2016
I go quite often ! I love coming to this location. They take care of my car and get me on my way very fast
Aug 26, 2016
They have taken care of me and my family for over a decade now. Always helpful and willing to go the extra mile.
Aug 26, 2016
Great customer service and job as always!! Had a problem with my tire and they took me in and solved the issue quickly!!
Aug 25, 2016
I got my oil changed and tires rotated while I was able to get some work done in the waiting area.
Aug 24, 2016
I went in for my tire rotation and they were fast and efficient.
Aug 24, 2016
I live in Denver.These guys are in Northglenn.It's an hour (depending on traffic) from my place to there.I don't care.These guys are awesome and totally worth putting a few extra miles on the car that I only trust to them.
Aug 24, 2016
professional staff and everyone was happy to help!
Aug 15, 2016
Always do a wonderful job I love these guys I will continue to go there
Aug 14, 2016
John and Aaron are terrific.They always make me feel welcome as well as giving me the feeling that I will be well taken care of.Big O has never let me down yet
Aug 14, 2016
As always, they did great service on my car this past week.
Aug 9, 2016
Did oil changes on multiple vehicles and gave me thorough recommendations regarding both cars.Also made time in a busy afternoon to patch a tire that had been punctured.John wanted to make sure that the tire hadn't been punctured before I left the store following the oil changes.There was a misunderstanding about wiper blade costs for one of our vehicles but the representative didn't blame me for the misunderstanding even though I very well could've heard her wrong.
Aug 9, 2016
I always have a great experience here. The staff is friendly and John is always willing to work with me and give me all the details. They remember me and know what my vehicle needs. I highly recommend this shop.
Aug 8, 2016
Great service.Understood my vague descriptions of problems.Timely communication and delivery.Appropriate price.I have faith in my car for another several years.
Aug 5, 2016
Part came in late but job still done when promised.
Aug 2, 2016
Called this morning for an oil change and tire rotation.Everyone was extremely friendly and knowledgeable!Free Tire rotation and balance, even though I did not buy my tires there!I will definitely use them for all of my future needs and recommend them highly
Aug 1, 2016
These guys give great and honest service and they don't try to sell me stuff I don't need everything I bring my car in for an oil change.
Aug 1, 2016
What can I say, Excellent as always.I am a very happy camper with the service I got.
Jul 31, 2016
I first went to the Big O on Summit last Friday.At one pm, they had at least an hour wait.The previous Saturday, I waited over an hour and they hadn't even started my car yet.Since the wait was so long again, I decided to try the 120th location.I was in and out in under an hour.I will definitely come back to this location from now on.One thing that could be improved was the front desk.It took a long time to check out.
Jul 30, 2016
I trust Mark and his crew exclusively for maintenance and repairs. I've referred friends and family and not one has had anything other than a fine experience.
Jul 23, 2016
I came in just for a regular rotation and asked they check my alignment as well as I thought I had a leak in my crank case gasket seal.Turns out my tie-rod ends were worn out from all the previous work I had done at a hack shop up the street, long story.So they replaced the tie-rod ends and just notified me about my water pump leak that looked like the gasket leak I thought.Correct diagnosis but the repair could wait a for another day.Nice to get out of the shop quick with out a $1K bill.
Jul 18, 2016
As simply stated above this staff does nothing but the best work, they have it done in a very timely manner, they explain what they are going to do and keep you informed as to the progress. John Aaron and the rest of the crew are great, some of the car manufacturers could take a lesson from them.
Jul 18, 2016
The crew installed new wheels on classic car and did a awesome job
Jul 18, 2016
The work was done one week ago and I am not having any problems.
Jul 16, 2016
Very courteous! Thoroughly explain the issue, repair, and costs.Always great service!
Jul 16, 2016
These guys know their stuff!Options, advice, service! Thanks for a job well done with advice on how to proceed with further service. Helping anticipate what comes next is huge for those of us in a budget. Thank you.
Jul 16, 2016
Jon and Aaron were awesome as usual! they started with the basics to get my daughter's car running well and didn't try to upsell any services that we didn't need.
Jul 11, 2016
Aaron once again, on top of his game. Nothing negative to say at all. I am and will continue bringing my car to Big-O on 120th and Washington.
Jul 5, 2016
Jon, the store manager was fantastic.The tires I wanted were not in stock (but at the warehouse.)Instead of holding me hostage and waiting for the tires to be delivered, he sent me away and called me when they arrived.The wait time was less than an hour.Fantastic Service.
Jul 3, 2016
I have been going to Big O for years, no places is like them for service
Jun 27, 2016
They were fast and courteous and kept me informed of the progress and if there were any changes to what was originally requested
Jun 27, 2016
They were nothing but nice and the car was done in no time.
Jun 27, 2016
I do not take my car anywhere else but BIG-O tires in Northglenn, CO off of 120th and Washington. I get nothing but the greatest customer service. Aaron, Chris and a couple other guys that I can not remember their names are always extremely helpful and help me with most of my needs and get me the greatest deal available. I have been taking my car there for over ayear now and always completely satisfied. Have been dealing with Aaron for over 2 years now, because it so happens he worked at the BIG-O down in Englewood off of south Federal and was awesome down there as well. I appreciate everybody there and strongly recommend BIG-O tires, Thank you, Ron Avery
Jun 25, 2016
The staff is always attentive and very knowledgeable about the service required.
Jun 13, 2016
I have been using big o for a few years now and there much more than just a great tire shop.
Jun 11, 2016
Treat their customers like family, good old fashioned customer service.
Jun 10, 2016
helped me save money on a tune-up which was a bad water pump
Jun 9, 2016
Nice to have a one-stop solution.Last visit was headlight, brakes, tie rod and air conditioning service. All done in the same day...perfect!
Jun 8, 2016
I have been taking my car here for years. I just took my car in for a routine oil change and they went above and beyond to repair little things and because of their diligence, found a major problem with my car. The problem, if left unnoticed, could have ruined my engine. I absolutely trust John with my car and know that I will get the best service when I take my vehicle there.
May 31, 2016
They repaired a nail puncture in my tire, as well a an old puncture that had been repaired poorly and was leaking air. They also squeezed in an oil change in a very timely manner so I made all my appointments the rest of the day without feeling rushed. They also told me about my cabin air filter, and how it would be an easy fix I could do myself, or they would be happy to do it for me for a very low cost. Very friendly and they don't upsell you on things you don't need.
May 30, 2016
Had to get a flat patched up.They decided that the tire was unable to be patched. Luckily I had purchased the hazard warranty, but I purchased it at another location.The big o staff in Northglenn sent someone to the thornton location to get me my tire.I thought that that was such a nice thing to do considering a flat tire is already a horrible way to start the day.Thanks again guys.
May 29, 2016
Always am greeted with a smile and attentiveness. Car was worked on promptly. And all the staff enjoyed getting a tail wag and puppy kisses from my dog!!Appreciate that I can bring her for some socialization time!!!She loves attention!!!
May 27, 2016
We use Big O for both if our vehicles and always are satisfied with our experience from simple oil changes to complex repairs
May 22, 2016
Had a check engine error P0446, it was recommended to replace solenoid rather than the charcoal canister and unfortunately after six days check engine light came back on. Now have to save up for $750 bad charcoal canister fix. Not big 's fault but frustrating losing $180 on a fix that didn't work.
May 20, 2016
I had just bought new tires a couple weeks ago and was enjoying the new tread when the tailgate of a dump truck showed up in my lane in the middle of I25. The highway was busy and there was no avoiding it. The Big O AT tires took the tailgate full on and somehow didn't blow. I did have a sidewall deform however. I took the truck in and they swapped it out under warranty! I couldn't believe it.
May 19, 2016
I have been a Big O tires for over 8 years now and I must say, there is absolutely no way I would take my car or my kids cars anywhere else. I truly love these guys. They provide the best customer service to every single customer that walks through their doors.
May 11, 2016
Great value for the money and staff is very knowledgable.
May 10, 2016
I went in for a rotate, balance and an oil change. While the technicians were performing their inspections they noticed the wear on the brakes. The service technician and front sales were very open and honest that it was not an immediate need however in the next few months it would need to be handled. Because of this open and honest approach, I went ahead and replaced the brakes so I was not put into a predicament of having to do it somewhere else.
May 5, 2016
Big o tires has great honest and helpful service. Thanks!!
May 3, 2016
Big O Northglenn is a dependable place to turn to. They treat you like family.
Apr 28, 2016
Thanks to the Crew for taking such good care of me. The work done on my Van has made me feel safer on the road. The front end steering is tighter and handles very well. I am no longer afraid to hit a pot hole. Thanks again.
Apr 25, 2016
Very helpful and very fast turn-around..I highly recommend the Washington-120th Street store
Apr 25, 2016
I have delt with both Mark and Chris and it has always been a great experience. I was a tire and lube manager at Big-O in Flatirons and these guys are true professionals honest and trust worthy and without a doubt the only place l will take all of our family vehicles for tires and service.
Apr 24, 2016
I use them whenever I had an issue with my vehicles. I get my tires and oil changes done here as well!!
Thank you
Apr 19, 2016
They did a great job with the alignment on my care and did it quickly.
Apr 6, 2016
All the people at big o are amazing! They remember our names and treat us like family! We trust them with all of our car care needs!!!
Roni Mckenny
Apr 6, 2016
They are honest about time frames and prices and will help you out.
Apr 4, 2016
I always have a positive experience at Big O Tires no matter the reason I have to bring in my car.
Apr 2, 2016
I always use big o. They have installed tires on 4 of my vehicles now. They always do a great job.
Apr 2, 2016
I always use them for all my car needs. Never disappointed.
Mar 31, 2016
I always bring my car to Big O for service and tires
Mar 31, 2016
I called the day before to ensure that my Mercedes tires would be waiting for me. Installation took less than 30 minutes and I was back on the road....perfect!
Mar 30, 2016
I brought both my cars in early this week. They were able to replace my bad power steering pump in one day when I expected it to take at least two days. The people behind the counter are very friendly and knowledgeable. They have always been honest with me and have never charged me for things that were not needed. I highly recommend them!
Mar 27, 2016
I brought my car in because a cover underneath the car had come off in the heavy snow. They fixed it for me quickly and did not charge me anything.
Mar 25, 2016
Went in with a noise and they diagnosed it and fixed it.
Great Job!
Mar 20, 2016
Went in for a regular oil change and was treated with professionalism and respect.
Mar 20, 2016
I go to this Big O Tires because I trust them. Over the years they have earned my trust.
Mar 20, 2016
The Professionalism & Customer Service of John & Chris Quintana was beyond reproach.
Mar 17, 2016
I went to big o tires for an oil change and they showed me a very serious issue withmy vehicle and so glad I found out because it was unsafe to drive my vehicle.They gave me a quote for price but let me mention they are not pushy at all.I ended up getting my car fixed by them.They gave me a price that nobody couldmatch so the price was actually very good.I would and will recommend them to anyone.Great service and honest as well.
Mar 15, 2016
Had service done to the front steering/axel area. The staff was friendly and explained the work well, price was fair and its been 3 weeks, so far so good. Past work has always been well done.
Mar 12, 2016
Having moved to the area last year, I was looking for a convenient, trust worthy business to take care of my vehicle. I am very happy that my Yelp search led me to you guys. The crew at Big O Tires took great care with my vehicle, and keeping my cost to a minimum. You guys rock!!
Mar 10, 2016
I went in to get my brakes done and was worried it might be a 3-4 hour process. Thankfully the worker that was helping me was very conscious of my time and was able to get everything done within an hour! Every time I go in they are always looking out for my best interest and that makes it easy to trust them with my car!
Mar 9, 2016
On Monday Big O accomplished an oil change/tire rotation as They have for the last 20 years. From Tires to Brakes to Alignment to a Muffler repair - their mechanics are honest and thorough. A decade ago they fixed my LittleO wheel barrow tire and it's still holding air.
Mar 3, 2016
So glad my Mom found Big O Tires and insisted I take my own car there for service. Count on quality service and excellent customer relations from these pros! I refer anyone who asks for a recommendation, and will continue to do so. Thanks so much, Mark and Johnny!
Mar 2, 2016
The staff is friendly and provide timely service. I appreciate the professional manner and the willingness to go the extra mile for the customer.
Mar 2, 2016
Oil and transmission change done on a busy Saturday morning...Friendly service and pretty accurate estimate for time to completion. Went there because others recommended and was not disappointed.
Feb 26, 2016
Aaron is on the ball!! Delivered as promised!! He is my go to guy there. You will be pleased with him !!
Feb 26, 2016
I never have anything bad to say when it comes to Big O Tires. They always do a great job :-)
Feb 26, 2016
Went in for an oil change and tire rotation. I waited there, it was less than an hour wait. Everyone was very customer focused and helpful.
Feb 25, 2016
Used them less than a week ago! Great service! Helpful!
Feb 25, 2016
I used them a week and am so happy! Would recommend them!!!
Feb 24, 2016
I use them for all oil changes, tire rotations and major repairs, they have always met my expectations
Feb 24, 2016
I couldn't ask for a better service. Great people!!
Feb 19, 2016
Awesome service, as usual. We were in and out of there within an hour, even though they were very busy. Salesman was friendly and helpful, too.
Feb 14, 2016
As a;ways the service was prompt and done RIGHT ! John and Arron continue to take a great deal of pride in what they do, as do the rest of the staff.
Feb 14, 2016
The team was very professional and stated what need to be replaced now and what would need to be replaced in the near future. The open, honest approach is appreciated and due to the respect that was earned that day I will be going back for future services.