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Mongoose Tyax Comp, Sport, and Expert Adult Mountain Bike, 27.5-29-Inch Wheels, Tectonic T2 Aluminum Frame, Rigid Hardtail, Hydraulic Disc Brakes

4.2 4.2 out of 5 stars 110 ratings
Price: $475.00 $949.99 Free Return on some sizes and colors

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Size Chart
US Mongoose Tyax bicycle
Brand SizeRider Height (in)Wheel Size (in)
2456 - 6624
2664 - 7426
27.564 - 7427.5
2864 - 7428
2964 - 7429
Bike Type Mountain Bike
Age Range (Description) Adult
Brand Mongoose
Number of Speeds 24
Color Black
Wheel Size 27.5 Inches
Frame Material Aluminum
Suspension Type Front
Special Feature Aluminum Frame, mountain bike
Included Components Bike

About this item

  • Hardtail mountain bike for a high-performance ride on rugged trails. 27.5-inch wheels with a small frame fit riders 63 to 67 inches tall.
  • Lightweight aluminum frame features internal cable routing for a sleek look, 141 mm rear hub spacing creates a more stable and rigid hardtail
  • 100 mm travel fork helps to absorb bumps in the trail
  • 11-speed drivetrain with trigger shifters provides smooth gear changes
  • Hydraulic disc brakes deliver superior all-weather stopping power
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From the manufacturer

Mongoose
Mongoose

GARAGE TO GLOBAL

Every good story starts with an idea. In 1974, Skip Hess had an idea for a cast-magnesium wheel durable enough for BMX riding. Over 45 years later, Mongoose is a globally recognized brand built on innovation. From BMX, to mountain bikes, scooters, and more, Mongoose delivers one of the best riding experiences out there. And it all started with a wheel in a Southern California garage.

Product Description

The Tyax has everything a rider could need to start attaching the tough climbs and winding switchbacks that come with XC riding. Available in 29”, 27. 5” and 24” wheel options and four component spec levels, it’s easy to find the right Tyax for you.

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Customer reviews

4.2 out of 5 stars
4.2 out of 5
110 global ratings

Customers say

Customers like the weight, smoothness, and versatility of the bicycle. For example, they mention it's very light, works great on basic single track and dirt trails, and isn't uncomfortable to ride. That said, they appreciate appearance, ease of assembly, and value. Opinions are mixed on comfort and quality.

AI-generated from the text of customer reviews

16 customers mention13 positive3 negative

Customers like the value of the bicycle. They say it has good features for the price point. Some customers also mention that it's not terribly expensive to upgrade.

"...Not a terribly expensive upgrade and the performance increase is incredible -- wheelie game is much improved haha!..." Read more

"...bike industry, I can say that this bike (comp version) is a good value for the msrp. It shines where other recreational hardtails fall flat...." Read more

"...technical and expensive, I would consider this a bike to be a good bang for your buck. The assembly was pretty straightforward...." Read more

"It is a great bike, shifts well, and is light (surprising for the price.. I know!)...." Read more

11 customers mention8 positive3 negative

Customers like the weight of the bicycle. They say the pedals are very light and spin smooth.

"...Frame seems great -- Lightweight, seems well engineered, everything bolts on smoothly and straight, and the welds are all good and visible which I..." Read more

"...It's just more simple and lightweight. It has not been uncomfortable to ride the way I use it. I like the 1×12 system also...." Read more

"Light weight and comfort" Read more

"...It was easy to put together, and is a good size for a teenager. It was heavy and is about the same quality as a Walmart bike...." Read more

6 customers mention6 positive0 negative

Customers find the bicycle easy to assemble. They say it's a two-person job, but not overly difficult. They also say the instructions are ok, but they're not great.

"...I had a full suspension before but loving the hardtail. It's just more simple and lightweight...." Read more

"...The assembly was pretty straightforward. Just need some Allen Wrenches. Unpacking and assembly took me about 30-40 minutes...." Read more

"...Assembly was pretty easy and straightforward. I would recommend following the user manual.I am pretty impressed so far...." Read more

"...Partial assembly required. Definitely a two-person job, but not overly difficult. Instructions are ok, but not great. Bike is comfortable to ride...." Read more

5 customers mention5 positive0 negative

Customers like the versatility of the bicycle. They mention that it performs great on basic single track and dirt trails, and works great for long rides. Some say that the rear wheel works great, and the bike runs well even on gnarly trails.

"...Not a terribly expensive upgrade and the performance increase is incredible -- wheelie game is much improved haha!..." Read more

"...So far it has been awesome! Hit a few trails last weekend and it performed great...." Read more

"Worked great on basic single track and dirt trails as is. Modified, adding hybrid tires for paved trails around San Antonio...." Read more

"The bike works pretty well, but there are a lot of creaking and clicking noises coming from the crank, brakes and handle bar riser...." Read more

4 customers mention4 positive0 negative

Customers like the appearance of the bicycle. They mention that they love the color, it looks great, and has some nice specs on it.

"...Mongoose itself is a pretty solid bike and it looks great...." Read more

"...This has been a great mid-grade bike to start on. Dig the orange color. Has some nice specs on it. I got a large frame, 29" wheels...." Read more

"...About new bike: Overall bike seems solid. I love the color. Components are reasonable quality, but it was a bit $...." Read more

"Great value for the price. Beautiful bike. Love the orange color. Bike was well-protected inside the shipping box. Partial assembly required...." Read more

4 customers mention4 positive0 negative

Customers like the smoothness of the bicycle. They say it has a smooth ride, and is easy to adjust. Some say the wheels spin smoothly and it doesn't feel uncomfortable to ride. They also say the shifting and brakes were adjusted perfectly out of the box.

"...pretty impressed with this bike out of the box -- shifting and brakes were adjusted perfectly and wheels were fairly true but the hubs were a little..." Read more

"...It's just more simple and lightweight. It has not been uncomfortable to ride the way I use it. I like the 1×12 system also...." Read more

"It is a great bike, shifts well, and is light (surprising for the price.. I know!)...." Read more

"Love this bike! Has a smooth ride like my Trek and handles really well...." Read more

31 customers mention20 positive11 negative

Customers are mixed about the quality of the bicycle. Some mention it's a great quality bike, decent bike for starting out or upgrading, and well engineered. However, others say that it delivered with faulty parts, came in a damaged box, and had a bent spoke.

"...Frame seems great -- Lightweight, seems well engineered, everything bolts on smoothly and straight, and the welds are all good and visible which I..." Read more

"...Bike feels very well built. Has nice front shocks and beefy tires. The bike is much more substantial than I anticipated...." Read more

"...I did have one problem with the front brake system. The hydraulic fluid had leaked out and the brake didn't work. There was an oily spot in the box...." Read more

"...The bike is well built, can easily handle fast rides through this, and I feel comfortable riding it in just about any of these places...." Read more

8 customers mention5 positive3 negative

Customers have mixed opinions about the comfort of the bicycle. Some find the seat very padded and more comfortable than they expected, while others say that the crank arms and hubs are a little tight.

"...The seat is very padded and more comfy than I thought it would be. I had a full suspension before but loving the hardtail...." Read more

"...were adjusted perfectly and wheels were fairly true but the hubs were a little tight, but easily adjustable and now very smooth...." Read more

"...I got a Medium Frame and it fits great! I am about 5'8". It has some really nice components on it.So far it has been awesome!..." Read more

"Light weight and comfort" Read more

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5 Stars
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Light weight and comfort
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Top reviews from the United States

Jond63
5.0 out of 5 stars Really Nice Fun Bike and Good Value
Reviewed in the United States on March 25, 2021
Color: OrangeSize: Comp/Medium Frame/29-Inch WheelVerified Purchase
I gotta say I'm pretty impressed with this bike out of the box -- shifting and brakes were adjusted perfectly and wheels were fairly true but the hubs were a little tight, but easily adjustable and now very smooth. Wheels and hubs seem like they are built to last and are not very heavy at all, even with the tires.

The Shimano shifting and Tektro brakes are great -- better than what came on a $2k 'boutique' bike I bought a few years ago. The rest of the parts are almost as good -- hub engagement is not bad at all for a budget hub, also much better than my previous more expensive bike. Gearing is totally adequate for me at least with even steps between gears which is nice, plenty of low for climbing, but could run out of gears on really fast downhills.

Frame seems great -- Lightweight, seems well engineered, everything bolts on smoothly and straight, and the welds are all good and visible which I like better than the toothpaste looking welds on some bikes. Can take an internal dropper too. Fits me perfectly based on the website suggestion, but I still need more rides to tell about the stem for sure.
The bike rolls smooth and fast! Can really cover ground with the 29er. This bike climbs great and is really comfortable. I climbed a big hill in my neighborhood just because and I never do that! I LOVE the orange color!

The seat and grips are much better than expected, and the pedals are ok too -- very light and spin smooth and should get better with use. I thought I'd swap all those out immediately but have decided to try them all longer. The tires are also pretty good, not too heavy, roll ok on pavement/hardpack, and pretty good in the dirt so far. Another pleasant surprise.

The only real gripe I have with this bike is the fork -- it is really heavy and just so-so in performance. I did ride with it for a day but then I swapped it out for a lighter air spring fork. Not a terribly expensive upgrade and the performance increase is incredible -- wheelie game is much improved haha! And yes, this bike wheelies great!

My first real BMX bike in the 70s was a Mongoose Motomag -- it's GOOD to be back on a Mongoose!

**Upgrading this to 5 stars from 4 because I realized the hardware to upgrade to 12x148 rear wheel is built into the frame! No additional dropout hardware needed! Upgrade at your own pace if desired. Love this bike!**
Customer image
Jond63
5.0 out of 5 stars Really Nice Fun Bike and Good Value
Reviewed in the United States on March 25, 2021
I gotta say I'm pretty impressed with this bike out of the box -- shifting and brakes were adjusted perfectly and wheels were fairly true but the hubs were a little tight, but easily adjustable and now very smooth. Wheels and hubs seem like they are built to last and are not very heavy at all, even with the tires.

The Shimano shifting and Tektro brakes are great -- better than what came on a $2k 'boutique' bike I bought a few years ago. The rest of the parts are almost as good -- hub engagement is not bad at all for a budget hub, also much better than my previous more expensive bike. Gearing is totally adequate for me at least with even steps between gears which is nice, plenty of low for climbing, but could run out of gears on really fast downhills.

Frame seems great -- Lightweight, seems well engineered, everything bolts on smoothly and straight, and the welds are all good and visible which I like better than the toothpaste looking welds on some bikes. Can take an internal dropper too. Fits me perfectly based on the website suggestion, but I still need more rides to tell about the stem for sure.
The bike rolls smooth and fast! Can really cover ground with the 29er. This bike climbs great and is really comfortable. I climbed a big hill in my neighborhood just because and I never do that! I LOVE the orange color!

The seat and grips are much better than expected, and the pedals are ok too -- very light and spin smooth and should get better with use. I thought I'd swap all those out immediately but have decided to try them all longer. The tires are also pretty good, not too heavy, roll ok on pavement/hardpack, and pretty good in the dirt so far. Another pleasant surprise.

The only real gripe I have with this bike is the fork -- it is really heavy and just so-so in performance. I did ride with it for a day but then I swapped it out for a lighter air spring fork. Not a terribly expensive upgrade and the performance increase is incredible -- wheelie game is much improved haha! And yes, this bike wheelies great!

My first real BMX bike in the 70s was a Mongoose Motomag -- it's GOOD to be back on a Mongoose!

**Upgrading this to 5 stars from 4 because I realized the hardware to upgrade to 12x148 rear wheel is built into the frame! No additional dropout hardware needed! Upgrade at your own pace if desired. Love this bike!**
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20 people found this helpful
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Kenneth
5.0 out of 5 stars Bad brake/great service
Reviewed in the United States on January 31, 2021
Color: Black/BlueSize: Expert/Medium Frame/29-Inch WheelVerified Purchase
This bike was a big upgrade for me and I'm really enjoying it! My last ride was a $175 Walmart dinosaur so naturally this is a big improvement. I ride 2-3 times a week on flat trails in Northwest Bay County Florida. This bike can probably handle more of the hardcore downhill stuff with some upgrades to the fork and drive train. Anyone interested in that would probably choose a different bike anyways. The SX system is the lowest end of the Sram Eagle series but perfect for my needs. I was using 26 inch wheels before (yeah, my bike was so old 26ers were still popular) so these 29ers are way better. The body on this bike looks and feels very high end. The seat is very padded and more comfy than I thought it would be. I had a full suspension before but loving the hardtail. It's just more simple and lightweight. It has not been uncomfortable to ride the way I use it. I like the 1×12 system also. I won't need these easy gears too much since it's so flat here in Florida. I was a bit worried the gear range would be limited but I can definitely fly on this bike. It's pretty fast!

I did have one problem with the front brake system. The hydraulic fluid had leaked out and the brake didn't work. There was an oily spot in the box. I took it down the road to the bike tech and he confirmed that. I was hoping he could fix it but he only replaces hydraulic systems. He was also backed up 3 weeks because everyone and their brother is buying bikes during Covid. I asked his opinion of the bike and he was impressed. I called Pacific Cycles and they sent me out a new break system. I came in 3 days and took 5 minutes to replace. I was naturally disappointed a bit when the bike came that way but still rating it high. Who knows what happened and the service after the sale was what mattered.
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Kenneth
5.0 out of 5 stars Bad brake/great service
Reviewed in the United States on January 31, 2021
This bike was a big upgrade for me and I'm really enjoying it! My last ride was a $175 Walmart dinosaur so naturally this is a big improvement. I ride 2-3 times a week on flat trails in Northwest Bay County Florida. This bike can probably handle more of the hardcore downhill stuff with some upgrades to the fork and drive train. Anyone interested in that would probably choose a different bike anyways. The SX system is the lowest end of the Sram Eagle series but perfect for my needs. I was using 26 inch wheels before (yeah, my bike was so old 26ers were still popular) so these 29ers are way better. The body on this bike looks and feels very high end. The seat is very padded and more comfy than I thought it would be. I had a full suspension before but loving the hardtail. It's just more simple and lightweight. It has not been uncomfortable to ride the way I use it. I like the 1×12 system also. I won't need these easy gears too much since it's so flat here in Florida. I was a bit worried the gear range would be limited but I can definitely fly on this bike. It's pretty fast!

I did have one problem with the front brake system. The hydraulic fluid had leaked out and the brake didn't work. There was an oily spot in the box. I took it down the road to the bike tech and he confirmed that. I was hoping he could fix it but he only replaces hydraulic systems. He was also backed up 3 weeks because everyone and their brother is buying bikes during Covid. I asked his opinion of the bike and he was impressed. I called Pacific Cycles and they sent me out a new break system. I came in 3 days and took 5 minutes to replace. I was naturally disappointed a bit when the bike came that way but still rating it high. Who knows what happened and the service after the sale was what mattered.
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17 people found this helpful
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Alex Mjolnir
5.0 out of 5 stars Great entry level MTB, good features for the price point.
Reviewed in the United States on March 2, 2024
Color: OrangeSize: Comp/Large Frame/29-Inch WheelVerified Purchase
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Alex Mjolnir
5.0 out of 5 stars Great entry level MTB, good features for the price point.
Reviewed in the United States on March 2, 2024
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Ryan H.
4.0 out of 5 stars Good value recreational hardtail mountain bike
Reviewed in the United States on March 11, 2022
Color: OrangeSize: Comp/Medium Frame/29-Inch WheelVerified Purchase
This was a gift to get someone I know into mountain biking.

As a seasoned rider and someone who is familiar with the bike industry, I can say that this bike (comp version) is a good value for the msrp. It shines where other recreational hardtails fall flat. While the top versions of similar bikes like the Giant Talon and Trek Marlin have air suspension forks, the Tyax comp makes up for with tubeless compatible wheels, which are costly to do after market. Pacific Cycles did cheap out on the non-tubeless wire-bead kenda tires, though.

The 4 stars comes down to quality control and incorrect info on Mongoose website for the technical specs. The bike I received has a mixture of Shimano Deore and SLX 11 speed drivetrain components where the website lists ALL slx componentry. In the industry, manufacturers reserve the right to spec bikes with similar OR BETTER componentry due to the possibility of supply issues. The spec of my bike a DOWNGRADE. The manufacturer product photos are outdated too.

As far as quality control, this comes to boxing up bikes and a problem that Mongoose factories have issues with. There is no hard protection over the rear derailleur when the bike is in the box, so my bike came with a frayed shifter cable and the paint rubbed off on the rear derailleur. I’ve bought other Mongoose bikes and have seen bent derailleur hangers, too.
6 people found this helpful
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Pass on this product. The hype is based on good marketing. Go with Costco sales.
1.0 out of 5 stars Don't purchase
Reviewed in the United States on January 18, 2024
Color: BlackSize: Sport/Large Frame/29-Inch WheelVerified Purchase
I got this thing delivered with faulty parts. Opted to keep it with a partial refund but looks like I'm just gonna have to throw it in a dump. Shoulda gone for full refund.
I don't trust it to work in any form of proper use - as most know, it could be a bone broken or worse. Feels like the plastic parts are the cheapest quality in the industry. One of my gear switches on the right side barely tapped the wall as it was leaning and cracked in half (from new condition).

Zero stars if I could. Just buy something better.
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