Boost thru axle adapter with conical end for bicycle trailers

Boost thru axle adapter with conical end for bike trailers

Thru axle adapter with steel head for bike trailer attachment

Three types of thru axle adapters – threads pitch 1.0, 1.5, 1.75. Closeup

Three types of thru axle adapters – thread pitch 1.0, 1.5, 1.75

Nordic Cab 12mm thru axle adapter for mounting bike trailer

Thru Axle Adapter for Bike Trailer – Universal 12mm Fit

Fits 95% of all 12 mm thru axle bikes
Works with all trailer brands
Strong, stainless & lightweight
Easy install – no special tools needed

Need help? Get fast support via form below

Taxes and duties are included in price.

Axle model

Clear

SKU: N/A Categories: Bike Trailer Hitch Adapter, Norwegian Hiking Brands, equipment and bike trailer / ski pulk accessories

Description

The best thru axle adapter for bike trailers – universal, safe and easy to use

Can’t attach your bike trailer to your bike? You’re not alone – and we’re here to help.
This adapter fits 95% of all bikes with a 12 mm thru axle.

Works with all bike trailer brands – Thule, Hamax, Burley, Nordic Cab, Qeridoo, Croozer, VidaXL and more
Designed to fit seamlessly with most modern bikes
Made of high-quality aluminum or stainless steel for strength and durability
Easy to install – no special tools needed

🤔 Not sure which adapter you need?

No worries – we’ll help you figure it out in under a minute.
📩 Just fill out our quick help form, and we’ll get back to you the same day or next business day.

Made by Nordic Cab – Experts in Bike Trailers Since 1983

We are Nordic Cab, a Norwegian outdoor brand with deep roots in adventure, family cycling, and rugged environments. Since 1983, we’ve been designing and manufacturing high-quality bike trailers and accessories built to withstand harsh Scandinavian conditions.

Our focus is on durability, safety, and smart design – so that families, outdoor enthusiasts, and pet owners can explore more with confidence.

We don’t just sell adapters – we use them ourselves, test them in real conditions, and support thousands of customers every year with different bike and trailer combinations.

Why choose our thru axle adapter?

Developed with hands-on experience from thousands of setups
CNC-machined for high precision and long-lasting quality
Compatible with all bike trailer brands
Recommended by our support team as the best all-round thru axle solution

We also collaborate with premium partners like Robert Axle Project for unique or rare configurations, so we can always help you – no matter what kind of bike or trailer you have.

Additional information

Weight	100 g
Dimensions	24 × 2 × 2 cm
Axle model	FL 1650, FL 1720, FL 1780, FL 1800, FL 1830
CountryOrigin	TW
Tarif	87149990

Find the Right Adapter

👇 Need help? We make it easy

Many people find it confusing to know which adapter they need – and we totally get it.
But don’t worry – we’ve made it simple. Let us help you!
🎯 Fill out our short help form here – it takes less than 1 minute. We’ll get back to you the same day or by the next business day at the latest.
Can’t find our reply? Check your spam or promotions folder.

Prefer to find it yourself?

Use our Bike Trailer Hitch Adapter Guide
We show you how to measure your axle and choose the correct model.

Specifications

Material: High-quality CNC-machined aluminum or stainless steel
Thread: Multiple variants available – M12x1.0, M12x1.5, M12x1.75
- Imperial equivalent (thread pitch): ~25.4, ~16.9, ~14.5 TPI
Diameter: 12 mm
- Imperial: 0.47 inches
Length: See list below
Made in Taiwan

Metric Measurements

Axle Head	Thread Pitch	Axle Length	Model
Flat	1.0 mm	158, 160, 164, 166, 170 and 172 mm	FL 1720
Conical / Boost	1.0 mm	152, 154, 156, 158, 160, 162, 164, 166, 168 mm	FL 1720
Flat	1.0 mm	167, 169, 171, 173, 175, 177, 179, 181, 183 mm	FL 1830
Conical / Boost	1.0 mm	161, 163, 165, 167, 169, 171, 173, 175, 177 mm	FL 1830
Flat	1.5 mm	159 or 165 mm	FL 1650
Flat	1.5 mm	172 or 178 mm	FL 1780
Flat	1.75 mm	174 or 180 mm	FL 1800

Imperial Measurements

Axle Head	Thread Pitch	Axle Length	Model Name
Flat	0.039 inches	6.22, 6.30, 6.46, 6.54, 6.69, 6.77 -inches	FL 1720
Conical / Boost	0.039 inches	5.98, 6.06, 6.14, 6.22, 6.30, 6.38, 6.46, 6.54, 6.61 -inches	FL 1720
Flat	0.039 inches	6.57, 6.65, 6.73, 6.81, 6.89, 6.97, 7.05, 7.13, 7.20 -inches	FL 1830
Conical / Boost	0.039 inches	6.34, 6.42, 6.50, 6.57, 6.65, 6.73, 6.81, 6.89, 6.97 -inches	FL 1830
Flat	0.059 inches	6.26 or 6.50 -inches	FL 1650
Flat	0.059 inches	6.77 or 7.01 -inches	FL 1780
Flat	0.069 inches	6.85 or 7.09 -inches	FL 1800

🚲 Fits With

Fits all trailer brands and most bikes with a thru axle

Our adapters is compatible with all trailers that attach to the rear hub/frame, including:

Bike trailer brands:
Thule, Nordic Cab, Hamax, Burley, Qeridoo, Croozer, VidaXL, InnoPet, Beemo, Trixie, North 13.5, Kayoba, Aretti, and more

Bikes with thru axles:
Giant, Trek, Scott, Specialized, Cube, Canyon, Merida, Orbea, Haibike, Momas, White, DBS, Bianchi, Raleigh, Xeed, Kross, Kalkhoff, Focus, BMC, Yamaha, Fuji, and others.

💡 This adapter covers 95% of all thru axle bikes. But if your setup requires a different type – we have that too.
👉 Fill out the adapter form if you’re unsure an we will help you.

Can’t find our reply? Check your spam or promotions folder.

Installation

Watch installation video:

Super easy – no special tools required. You’ll need just a hex key or wrench.

Step-by-step guide:

Remove your current axle from the bike’s rear hub
Compare thread pitch and total length with the new adapter
- The total length should be within ±2 mm of your original axle
- Some of our adapters include removable spacers – simply add or remove them to match the correct length
- Make sure the thread type is identical
Insert the new adapter into the hub
Tighten by hand first, then secure it using a Allen key
1. How Tight Should It Be?
  - If you have a torque wrench, we recommend tightening to 10–12 Nm (Newton-meters) – this is standard for most thru axles.
  - What if you don’t have a torque wrench? No problem. Here’s what 10–12 Nm feels like:
    - First, tighten by hand until the axle is snug and fully seated.
    - Then, with a standard 6 mm Allen key, apply firm pressure – like you’re turning a doorknob firmly, but not straining or using your full body weight.
    - It should feel secure, but not overly tight.
    - Tip: It’s always better to go slightly under-tightened than overtightened, especially on alloy or carbon frames.
2. Attach your trailer hitch to the adapter’s end

FAQ

FAQ – Frequently Asked Questions

Will this fit my bike?

If your bike has a 12 mm thru axle – most likely yes. This adapter fits 95% of all modern thru axle bikes.

What if I buy the wrong one?

No problem – if you’re unsure, contact us first. We’ll help you get it right. (Free exchange inside Norway.)

Can I install it myself?

Yes! It’s super simple. You only need a hex key or wrench.

Will it fit my trailer?

Yes – it fits all bike trailers that mount on the rear hub (2-wheel trailers, not single-wheel cargo).

Does it come with spacers?

Yes – many variants come with removable spacers to adjust length.

What is a thru axle?

It’s a solid axle that goes through your frame and wheel hub – common on modern MTBs, e-bikes and gravel bikes.

How do I measure my thru axle?

Remove the axle and check for printed specs. You’ll see something like “M12x1.5 – 172 mm”. Or use our guide.

Can I use it with a quick release bike?

No – this is only for thru axle bikes. For quick release, check our 5 mm adapter.

What’s the thread pitch?

It depends on your bike. Common are M12x1.0, M12x1.5 or M12x1.75 – let us help you check.

Is it safe for children/pets in the trailer?

Absolutely. All our adapters are tested and safe for towing kids and dogs.

Do I need a torque wrench?

Not necessary – hand-tight and secure with a wrench is usually enough. Check manufacturer guidelines for torque specs.

Can I use this on multiple bikes?

Only if they have the exact same axle specs. Otherwise, you need one per bike.

Does this work on electric bikes?

Yes – most e-bikes use thru axles. Just check the specs.

What if my axle has no visible markings?

Send us a photo and we’ll help identify it.

Where is it made?

Our adapters are made in Taiwan – trusted for high-quality bike parts.

Can I use this with a hooded dropout?

Yes – our design works perfectly even on hooded dropouts.

Is this compatible with Robert Axle Project?

Yes – we also collaborate with them for special adapter types.

Do you ship worldwide?

Yes! We use DHL Express for fast, tracked global shipping.

How long is delivery in Norway?

Usually 1–3 business days.

Do you sell solid axle or QR adapters?

Yes – check out our full adapter collection.

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