Item 1 of 2
Item 1 of 2
popularneomatrixviper posted Jul 27, 2026 1:29 PM
Infinity Boss Three Disc, Unisex 17" Step Thru Bike $339.99 free Shipping Costco.com
$340
$400
15% off
Costco Wholesale
Costco WholesaleDeal Details
https://www.costco.com/p/-/infini...?langI
$60 OFF
$60 manufacturer's savings is valid 07/17/26 through 08/02/26. While supplies last.
Limit 5 per member.
17" Step Through Frame
Rigid Blade Front Fork
Shimano 7 Speed Drivetrain
Aluminum Double Wall Rims
Yake Disc Brakes
$60 OFF
$60 manufacturer's savings is valid 07/17/26 through 08/02/26. While supplies last.
Limit 5 per member.
17" Step Through Frame
Rigid Blade Front Fork
Shimano 7 Speed Drivetrain
Aluminum Double Wall Rims
Yake Disc Brakes
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
https://www.costco.com/p/-/infini...?langI
$60 OFF
$60 manufacturer's savings is valid 07/17/26 through 08/02/26. While supplies last.
Limit 5 per member.
17" Step Through Frame
Rigid Blade Front Fork
Shimano 7 Speed Drivetrain
Aluminum Double Wall Rims
Yake Disc Brakes
$60 OFF
$60 manufacturer's savings is valid 07/17/26 through 08/02/26. While supplies last.
Limit 5 per member.
17" Step Through Frame
Rigid Blade Front Fork
Shimano 7 Speed Drivetrain
Aluminum Double Wall Rims
Yake Disc Brakes
Community Voting
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+16
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Bad Deal
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14 Comments
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This or Ozark trail g.1 for ~$260? I haven't been able to find the g.1 in small frame size though and I need for people under 5' 7" or so.
This or Ozark trail g.1 for ~$260? I haven't been able to find the g.1 in small frame size though and I need for people under 5' 7" or so.
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We have since just bought a used trek for $150 on marketplace and are much happier with it (lots were bought and never used over the last 20 years).
Something like that or an ozark trail would probably be $ better spent.
While disc brakes sound nice, cheap and poorly adjusted disc brakes are horrible. On a normal neighborhood bike, there's nothing wrong with rim brakes and they're relatively fool proof.
The biggest drawback of this bike is the twist shifters, but that's an easy upgrade. You can replace them with trigger shifters for under $25 on Amazon if you prefer that style.
Based on many of the Costco reviews, the larger issue doesn't appear to be the bike itself—it's the assembly. Many bikes purchased online or from big-box retailers aren't properly adjusted out of the box. If you have a local bike shop assemble or tune it, I expect it would ride just as well as many entry-level Trek, Specialized, or other major-brand bikes. Modern bicycles are mature technology, and much of the drivetrain and braking hardware comes from the same component manufacturers across brands.
For perspective, the least expensive new Specialized with disc brakes starts around $700. Getting a bike for under $350 that shares much of the same componentry and overall quality makes this a compelling value. I'd put the money you save toward having it professionally assembled and tuned—you'll likely end up with a much better riding experience than relying on the factory assembly.
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We have since just bought a used trek for $150 on marketplace and are much happier with it (lots were bought and never used over the last 20 years).
Something like that or an ozark trail would probably be $ better spent.
While disc brakes sound nice, cheap and poorly adjusted disc brakes are horrible. On a normal neighborhood bike, there's nothing wrong with rim brakes and they're relatively fool proof.
The disc brakes on this were quite bad and seized mid ride several times unfortunately. I've never had that happen with rim brakes or better disc brakes.
Bought this bike 3 years ago. Wish we had returned it. It was a starter bike so did not get a good feel of it. Having tried other bikes realized how bad the ride is.
- It's very tough. You know in school bike rack, the bike gets knocked over pretty much every other day, and other kids push and pull their bikes in and out right next to it without showing any mercy, and it held up surprisingly well
- It comes with rack. And it's good quality rack with decent metal thickness, so it's perfect for students
- Disc brake. I know it's a personal preference for brake type but once tweaked right disc brake works really well especially in raining days
- Don't underestimate how important fenders are, when you ride in wet/muddy roads
- This bike has been exposed to California sun every school day for last few years. And many unexpected rains. It definitely shows age but it's still perfectly functional
- No gear on front chain ring -- I see this as a good thing for simplicity. 7 speed is more than enough for my kid's commute
Like any bike you need to take some care of it, but not too much:- Clean/lube the chain from time to time, especially after rain
- Check chain stretch and replace as needed. I just replaced the chain ($12 on amazon for KMC Z7 with quick link) for the first time, as the previous chain reached nearly 1% wear after 4-5 years
- I added flat-out sealant to the inner tube (since it's schradder valve it's super easy). No flat since then
- Disc brake requires occasional micro adjustment to avoid rubbing, but it's like the case for all disc brake bikes
- Changed brake cable once as the old one eventually got rust after being exposed to rain. This is the time you appreciate the simplicity of external cable routing.
These are really minimum regular bike work that should be done on all bikes. Nothing special.Of course there are a few things I wish it were better, but for the price I paid and how well it worked, I don't really complain:
- Weight. It's heavy. I think the frame is a mix of aluminum and steel (fork). But that's what makes it strong
- The stock brake pads can create noise from time to time when braking. Clean the disc with alcohol helps, until it comes back next time. Small annoyance but not enough for me to get bothered. Plus, I think it will get better when I change new set of brake pads
- It comes with twist shifter, not trigger shifter. Again, minor stuff. But it's strong. Once the shifter cover (where you can see thru the gear numbers) popped off when the bike was knocked over. Guess what, a few drops of of superglue fixed it.
- One time I found 2 screws on the rear disc rotor were missing (6 of them hold the rotor to the hub). Re-applied loctite to all screws and no issue again.
For me this is a perfect bike for kids with balance between quality and price. My kid's first bike was a very cheap one from Target and it didn't hold up for a year. They really like this one, and at $280 if it ever gets stolen or completely destroyed after many years' service, I won't cry too hard.But seriously, though, just buy a flat-bar Ozark Trail Explorer G.1 instead.
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