(4 customer reviews)

NV170 Steel MTB Frame | 170mm Rear Travel | Chromoly Steel Full Suspension Enduro MTB Frame


Frame Pre-Order Deposit : $99.00



SKU: NV-170-Steel-Full-Suspension-MTB-Frame Category:


*Order Now To Be Put In Queue for Fastest Delivery – Please Contact Us for Lead Time*


This is Not a Complete Bicycle – What’s Included:

What’s listed in the drop down menus that you choose
What’s stated as being included in the specs


NV170 Chromoly Steel Mountain Bike Frame | USA Built Chromoly Steel Full Suspension

More Fun

Bikes should be fun and not be taken so seriously. Single pivot steel frames are said to be more lively in the corners, off the jumps, in the jibs and when it’s rough. They maintain composure and handle the rough stuff by tracking over the top of the rocks, roots and bumps instead of getting hung up.

More Confidence

Sweet spot geo and pivot placement when combined with the single pivot action allows the bike to float over the nasty stuff. This combination provides you with a really fast rolling bike.

More Comfortable

Steel has a feel that has to be felt to be properly understood. It’s forgiving, easy on your joints and feels amazing. That rough chop and harsh vibration is either removed or significantly diminished. Less fatigue can result in more stamina so you will not feel as tired after those long days on the trails.

More Value

Have you shopped around for a steel full suspension mountain bike frame? One with this much design prowess and quality thought into it is impossible to find for anywhere near this price. Competitive frames are being sold for $2400-$3500 and while we believe ours is worth that also, our goal was to offer an extreme value to the mountain biking community to get our name out there and help fellow riders out.

Less Maintenance

We would rather ride our bikes than wrench on them. 4 pivot bearings for longer service intervals is the hallmark of our design.

Less Noise

Is this really all that important? Some people really don’t like distractions when they ride. Creaks and cracks, settling and friction sounds are all common on other non steel bike frames. Typical noises are not typical on steel Ferrum Bikes frames. There are sounds that can’t be avoided like contact with objects and non-frame related parts but the frame itself and its assemblies are nice and quiet.

Powder Coated vs Painted

We opt for powder coating on the NV170 for extreme durability compared to paint. If you’re unfamiliar with powder coating, it’s fine polyurethane (or similar) particles electrically deposited to the surface of the frame and cured in an oven at ~450 degrees farenheit melting it into a hard shell. It’s not impervious to damage but won’t chip as easy and it adds another level of durability.



Just now stumbling into the awesome world of Chromoly Steel? Or maybe you’ve ridden this amazing material and you’re not going to settle for anything less? Chromoly provides a feel that adds more excitement and satisfaction to your ride. Less noise, chatter and nuisance while minimizing harshness and providing a supportive feel are some of the benefits to chromoly steel mountain bike frames. If you’re new to the sport or a long time veteran, the benefits of chromoly steel are noticeable regardless and we are confident that you’ll find new confidence in your riding once you throw a leg over the NV170 and take it for a rip down your favorite trail.


Pedals like a Dream

It’s better to have it and not need it, than need it and not have it! With our design, you have to forget the idea that higher travel means less efficiency. This is a powerful combination that will take on hill that you want to throw at it while still having the travel to soak up the roots and boulders. The Pivot Point on our NV170 was optimized and obsessed over to bring to you a bike that delivers over 100% Anti-squat through it’s travel. When you pedal, you want your bike to put all the power into the ground and not into the suspension to go to waste. Every pedal stroke can force the system to soak up some of that energy causing you to wear yourself out faster. The biggest factor that determines pedal efficiency is the Pivot Point. Looking at our Anti-squat curve, you’ll see that the NV170 delivers over 100% Anti-squat throughout it’s travel.


Your Wheelbase is More Consistent

We discovered a balance that others are just now starting to find with our Pivot Point working it’s magic. The first part of the axle path is regressive, meaning it grows to counteract a shrinking wheelbase. When descending the chunk, having a bike shrink on you can alter your handling and negatively effect your ride. The opposite of that is having too regressive of an axle path can cause your wheelbase to grow too much in corners throwing your corner speed off and causing an unpredictable handling characteristic in the twisties. Our mid-high pivot is the balance that others are just now realizing is working for them better as opposed to going with either ends of the spectrum.


CNC Machining

We opted for CNC machined shock mount/pivot arms to help give our frame it’s high end feel. Nothing says “high-end” more than CNC machined parts, especially our 4140 chromoly arms which are not kind to tooling and extremely expensive to machine. We spared no expense to offer a frame that despite it’s simplicity, it’s overachieving compared to bikes that cost a lot more.


Single Pivot Steeze and Durability

Stainless steel pivot axle and quad 6001-2rs bearings double stacked for longevity and rigidity where it matters most. Thanks to modern suspension technology, single pivot is back. Why single pivot? Easy maintenance and easy on your wallet. The ride is predictable and it doesn’t get hung up as easily on impacts which allows you to carry more speed on those steep descents. It offers a brilliant balance of amazing ride characteristics, simplicity and durability.



Slider Dropouts enable fine tuning of rear wheel adjustment due to wildly variable tire manufacturer sizing measurements. We think outside the box, so we offer a solution to fitment of your favorite size wheels and tires without sacrificing anything you’d love in a chromoly steel frame.


Modern Specs

Made for 73mm BSA bottom bracket, 148mm boost, internal cable routing for dropper seat posts, tapered forks. All your modern mountain bike specs in a more progressive and exciting package.

Geometry and Sizing

Geometry & Sizing

The NV was developed with progressive forward thinking geometry in mind. Utilizing slack geometry with 37-46mm offset forks provides a stable, fast and well handling steed.



(5’5″/1.65m to 5’9″/1.78m)


(5’10″/1.78m to 6’2″/1.84m)


(6’2″/1.84m to 6’4″/1.98m)

Head Tube Angle

63° (180mm Forks)
63.5° (170mm Forks)
63° (180mm Forks)
63.5° (170mm Forks)
63° (180mm Forks)
63.5° (170mm Forks)

Seat Tube Angle

76° (180mm Forks)
76.5° (170mm Forks)
76° (180mm Forks)
76.5° (170mm Forks)
76° (180mm Forks)
76.5° (170mm Forks)

Headtube Length

110mm 110mm 110mm

Bottom Bracket Drop

30mm 30mm 30mm


465mm 485mm 510mm

Virtual/Effective Top Tube

597mm 614mm 617mm

Wheel Base


1208mm 1225mm 1248mm

Front Center

773mm 790mm 813mm

Seat Tube Length

405mm 425mm 455mm

Chainstay Length

435mm (adjustable +15mm) 435mm (adjustable +15mm) 435mm (adjustable +15mm)



NV Frame Specs

Frame Weight

8lbs 14oz/4kg To 10lbs/4.5kg (Medium-XL – raw, no hardware, no shock)


Spec: ZS44-28.6/EC44-40 (Ferrum Branded)

Rear Axle

Spec: 180mm Length – 12×1.5 Thread Pitch

Rear Wheel Travel


Rear Wheel Tire Clearance

Up To ~27.5×2.6″ to 29×2.5″

Rear Shock

200x57mm (7.875×2.25)

Shock Hardware

22x8mm Front and 40x8mm Rear

Hub Spacing Rear

BOOST 148mmx12mm (Axle Included)

Bottom Bracket Standard

73mm BSA Threaded

Forks Steerer Spec

Tapered Forks 1.5″ > 1-1/8″

Max Fork Travel


Seatpost Diameter


Dropper Seatpost Cable Routing


Seat Post Clamp

34.9mm (Included)

Hydraulic Disc Brake Mount Rear

IS Mount (Example: Use Magura adapter QM-9 for 203mm rear rotor or Magura QM-41 for 180mm rear rotor)

Hydraulic Brake Disc Diameter Max (Rear)



Recommended ISCG-05 BB Adapter as shown HERE

Why Chromoly?

Why Chromoly?

Chromoly is much stronger than traditional steel and aluminum alloys. Chromoly is the most earth friendly material that we’ve seen besides bamboo that’s being made into bicycles. Studies show that chromoly requires 6-11 times less energy and emissions than competing materials to mine, manufacture and process.

Most people looking to buy our frame will have their minds made up on chromoly steel frames and prefer this material for their next frame but if you’re new to or curious about this amazing material, here are some of the advantages you’ll hear from experienced riders:


Chromoly steel bike frames possess a natural flex that absorbs sounds. While not completely silent when contact is made with rocks or roost, the ride is very stately feeling. Focus on the path ahead, not nuisances.


You’re buying a bike that will stand the test of time with proper care and maintenance. Imagine owning a bike that can be welded and repaired rather than degrade and be thrown away. Most people consider the user-friendly nature of chromoly to be a very wise investment.


Our steel full suspension mountain bike frames are engineered with controlled flex, working with the natural characteristics of heat treated chromoly and stiffening it up where it’s necessary for maximum efficiency. Chromoly tubing for a mountain bike is very thin yet incredibly strong, it has an inherent flex that people strive for in order to reduce vibrations translated to their hands and feet which works to reduce rider fatigue and increase rider comfort. Ride longer, more comfortably and much harder. Slight flex in the rear keeps the wheel planted in sharp hard turns keeping you on two wheels.


Chromoly’s strength to weight ratio rivals that of titanium yet it’s more affordable. Rest easy knowing what you’ve accepted as norm, steel is strong. Imagine a high-tech, lighter weight yet stronger alloy of steel being made into a frame for your next mountain bike. There are pluses and minuses for every known material being made into a mountain bike frame but welded seems, not glued, is something we personal feel is more solid and secure. Metal melted to metal, not piece, glued to piece. Fancy marketing words will lead you to believe other materials are “one solid piece” (“Monocoque”) but research shows that’s misleading, it’s actually multiple segments glued together into one piece which is strong too for only a comparably very short lifespan. Ride safe though, we can’t be held responsible for your new found feel of steel, ride at your own risk, ride responsible.

Color Examples

Color Examples

Best Steel Mountain Bike FrameBest Steel Hardtail Mountain Bike FrameBest Steel Mountain Bike FrameBest Full Suspension Mountain BikesBest Steel 29er Full Suspension Mountain BikeSteel 29er Mullet FrameSteel Hardtail Mountain Bike



Original Owner:

2 Years Warranty / Lifetime Repair
Terms of Warranty

Second Hand Owner:

2 Years Warranty / 4 Years Repair
Terms of Warranty

4 reviews for NV170 Steel MTB Frame | 170mm Rear Travel | Chromoly Steel Full Suspension Enduro MTB Frame

  1. Marcus Melhuish (verified owner)

    I’ll start by saying steel is real! I have always been on a steel hardtail until I ordered this frame and it is amazing! currently running a 170mm bomber up front with 29” wheel and 27.5 out back and this thing handles like a trail bike and smashes rough terrain like a DH bike! The build quality is exceptional and looks sick too. All in all i could not be happier.

  2. Joshua Padilla (verified owner)

    Riding the NV170 through rugged terrain feels like riding on a well maintained singletrack. I run 27.5 Enduro/DH wheels with a 190mm RockShox Zeb fork and an MRP progressive coil shock. I frequently ride mine over obstacles such as large downed trees and root riddled drops and have yet to break anything after a few months of constant riding. I’ve damaged linkage bearings on my Trek and Haro full suspensions in the past and even even cracked aluminum frames before so the extra durable single pivot and rugged steel of the NV170 is very much welcome. Don’t let the externally routed cables put you off either, this only makes it easier to maintain/replace drivetrain and brake components (functionality vs cosmetic). I suggest the NV170 to anyone that wants an extremely reliable and easy to maintain platform for shredding rough trails!

  3. Jose (verified owner)

    Best enduro bike I’ve ever owned. Planted, silent and comfortable. It inspires confidence! I’ve beaten all of my previous times in the California Enduro Series with this bike!

  4. Robert Samudio (verified owner)

    After owning and riding this bike for well over a year, I can properly give the frame the five stars it deserves. With 180mm up front and all that 170mm of plush coil travel in the back, this frame can take anything that you throw at it. Literally anything. It’s a mini downhill bike that doesn’t absolutely suck to pedal. Living in Texas, all there is to do is pedal. Pedal up climbs. Pedal down descents. Pedal everywhere because of how relatively flat it is here, and not once have I complained about the pedaling efficiency about the bike. Traveling out of state is where the bike really opened up for me. The frame is bomb proof. I’ve gotten myself out of situations on this bike that I thought might’ve put me in the hospital. If you want a bike that you will truly make you reach the limits of your riding ability before the bike even breaks a sweat, look no further.

    All that being said, this bike is one of the most mechanic-friendly frames, with external routing, BSA threaded bottom bracket, easy sliding dropouts, shoot even the bearings on the single pivot are so easy to service with the location of them. Any time I have ever had a concern, the customer service has been world class. Truly a pleasure owning and riding a Ferrum, they have a lifelong customer out of me.

Add a review

Your email address will not be published. Required fields are marked *