Frequently Asked Questions
Sizing & Fit
How do I know what size bike my child needs?
The best way to size a kids' bike is by your child's height/inseam, not their age — kids of the same age can vary by several inches. Use our [Bike Finder tool] and enter your child's height to get a recommended model. As a general guide:
My child is between two sizes — which one should I choose?
We generally recommend sizing up if your child is an aggressive rider or close to a growth spurt, since our adjustable seat post give roughly [5 inches] of extra room.
Our Gale series bikes come with a height-adjustable stem and extra seatpost adjustment range, making them a great fit for kids going through fast growth spurts.
How much room does the bike have to grow with my child?
Every Nabiis bike has an adjustable seat post. On average, our bikes fit a [10-12 inches] height range, so most kids can ride the same bike for [1–3 years].
What if the bike doesn't fit once it arrives?
No problem — see our [Returns & Exchanges] section below. You can exchange for a different size within [30] days of delivery.
Shipping & Availability
How long will it take to receive my order?
Orders typically ship within [1–3 business days] and arrive within [5–7 business days] after that, depending on your location. You'll receive a tracking link by email once your order ships.
Do you ship outside the U.S.?
No, we currently only ship within the contiguous United States. We do not yet ship to Alaska, Hawaii, or internationally.
Can I change my shipping address or order details after purchase?
If your order hasn't shipped yet, contact us at [service@nabiis.com] as soon as possible and we'll do our best to update it. Once an order has shipped, we're unable to redirect it.
Assembly
How much assembly is required?
Your Nabiis S/Gale bikes arrive [85]% pre-assembled, Mark Pro bikes arrive [95]%.
Typical home assembly takes about [5–8 minutes] with basic tools included in the box .
Is there a video guide?
Yes — every model has a step-by-step assembly video and printable manual on our [Assembly Instructions page].
Does the bike come with a kickstand, bell, or any other items?
l Inside the bike box, you'll find a smaller box hidden at the bottom, which contains your bike pump, bell, 2 reflectors（other 2 reflectors are alrealy on the bike）, tools for assemble (hex key, cross-head screwdriver, spanner), and a instruction manual.
Returns, Exchanges & Warranty
Free Return within 30 Days
We offer a 30-day trial period from the date of delivery. If the bike isn't the right fit, you can return it for a full refund.
- Free Returns: We will cover 100% of the return shipping costs.
- Condition: To qualify for a full refund, the bike must be returned in its original box and in like-new condition (free of dirt, scratches, or signs of outdoor wear).
Can I exchange for a different size or color?
Yes, within [7] days of delivery. Contact [service@nabiis.com] to start an exchange.
Note that ：
When you exchange your bike, we'll cover the cost of shipping the original bike back to us. You'll just need to cover the shipping cost for the new bike we send out.
What does your warranty cover?
- 5 Years on Frame and Fronk Fork
- 3 Years on Non-wear components & Belt Drive (bars, stem, seatpost, hubs, cranks)
- 3 Months on Shock hardware, Bolts, Spokes
Our warranty applies strictly to the original owner and covers manufacturing and material defects. It activates automatically on your confirmed delivery date.
Effective Date
The warranty period activates automatically on the confirmed delivery date of the bicycle.
What We Cover
Our warranty protects exclusively against manufacturing and material defects under normal, intended riding conditions. Covered instances are limited to:
Frame & Metal Components: Weld separation, stress fractures, structural cracking, or spontaneous deformation on the frame, fork, and non-fastener metal components.
Hardware & Fasteners: Spontaneous breakage, structural cracking, or unprovoked deformation of bolts and fasteners.
Factory Defect: Factory-stripped threads on any component out of the box (valid strictly prior to your initial assembly).
What's not covered under warranty?
The following instances are completely excluded from warranty coverage:
Standard Consumables: All non-metal wear-and-tear items, including but not limited to tires, inner tubes, brake pads, and grips (with the sole exception of the drivetrain belt, which is protected under our separate 3-year policy).
Misuse & Impact: Dents, scratches, cosmetic abrasions, or structural failures caused by crashes, impacts, stunts, overloading, or improper storage and weather exposure.
Assembly Errors: Damage resulting from incorrect home setup, improper torque adjustment, neglectful maintenance, or unauthorized third-party modifications.
Liability Disclaimer: Personal injury, medical expenses, or collateral property damage resulting from collisions, scratches, or accidents involving other parties or objects during product use.
How do I file a warranty claim?
Email [service@nabiis.com] with your order number, proof of purchase, and photos or a short video showing the issue.
Our team typically responds within [2 business days].