2023 Nitrous Complete Bike

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The big change for the 2023 model year is the switch to 'post mount' rear brake and Universal Derailleur Hanger. Switching to the UDH allows you to use the newest SRAM  'Transmission' rear derailleur and cassette.  

For many of us, there is also a ton of riding that does not require a full suspension bike. So I decided to make a fast, lively feeling, fully modern Cross Country mountain bike with up to date geometry that utilizes a beautiful steering, short stem and a wide bar. 

Voila'! A bike far more capable feeling than any gravel bike when the going gets rough, and conversely far more nimble and responsive than a full suspension bike for powering along on the less demanding terrain that so many of us have easy access to.

The first part of designing the Nitrous was to make it inspiring to ride up the hill, almost urging you to new speed. With the low weight and balanced geometry, you will look at the steep sections of your favorite trails and know you can go further and faster than ever before.  To create that snappy feel I pulled the chainstays in nice and short. As always there is a balance to frame geometry aspects and the first couple protos were even shorter, but I really felt the bike should be more stable.  So the chainstay was stretched just a bit for some more stability on ungroomed trails.To maintain the awesome traction on the rear wheel, the seat tube angle was slackened a little.   

For me, the 'longer’ part of the longer, lower, slacker ditty means that you can now install a crisp steering, super short stem and still be in a focused, powerful position while climbing. This  ‘longer’ aspect to frame geometry also puts the front wheel further in front of your center of mass for more descending stability, and this is especially important when pushing the limits outside of the smoother trail networks.

Ok, now we need to talk about the ‘slacker’ part of the ditty. To be sure the Nitrous is slacker than most hardtails ever built. But it is by no means the slackest, the race to create the most extreme numbers is over. What is important is that the head angle is properly designed for the type of riding most will do on the Nitrous. Not so slack as to cause wheel flop on the tight technical turns and more importantly, it is not so slack that one cannot weight the front wheel on flatter turns.

The results of all the testing and geometry tweaking was to give the stability we expect out of a modern cross country / trail bike, without losing the liveliness we crave from a high performance hardtail. 

So, is the Nitrous a fast XC bike or is it a stable , fully modern XC sled, ‘downcounty’ or is it the perfect bike for Leadville type endurance races? I would say yes, it is. 

rec'd height 5'1"-5'6'' 5'6''-5'10'' 5'10''-6'2'' 6'2''-6'6''
effective TT 585 615 640 670
seat tube 370 400 430 470
seat tube angle real 75° 74.5° 74.5° 74°
head tube 85 100 125 155
head-angle 66° 66° 66° 66°
bb drop 62 62 60 60
chainstay 435 435 440 445
reach 420 443 462 478
stack 610 623 644 672
wheelbase 1140 1166 1200 1233
standover@mid 760 775 805 835
Max post insert 250 210 240 280
{ All specifications are subject to change. Measurements are given in ‘Millimeters’ and ‘Grams’ unless otherwise noted. }

Frame Spec

Seat Post Diameter 30.9mm
Headset Dimensions ZS 44/56 semi integrated  
BB Shell T47 Threaded
Fork Length  120-140max  (Geo based on 120 fork)
POST mount rear brake 180 max
Max Tire Clearance 29'' x 2.5'' or 27.5'' x 2.8'' With full clearance
Max Boost chainring size:   36t oval  38t round


 SRAM AXS GX  'Transmission' Build Kit

*Parts subject to change based on availability


Fork  RockShox SID 120mm Ultimate RaceDay, 3P on fork crown
drivetrain SRAM AXS GX Transmission  10-52.   incl. battery and charger
crankset Praxis Girder XC, carbon,  175, 32t
brakes SRAM Level Silver stealth,  4 Pistons, 180 ft 160 rr
wheelset Reynolds 289/309 Black Label Expert, carbon rims, butted spokes
tires Maxxis Rekon, 3T,EXO, tubeless ready,   29x2.4WT
sealant NoTubes Sealant
headset Cane Creek 40 Series,   44/56  semi integrated, ZS top and bottom.
handlebar Whisky No 9 carbon,  25mm rise
stem Whisky No 7 MTN  50mm
seatpost One UP dropper. 150 small, 180 med, 210 lg & xl
saddle WTB Volt, medium width
grips ODI Elite Motion, lock on, Black with custom laser etched clamp


Subtle shaping at the lower end of the Down Tube to the spread load over the BB shell and a dramatically flared Seat Tube both increase lateral rigidity for better feel when smashing the pedals. Along with the custom tapered chainstays, these subtle features set the Turner Ti ahead of the pack when it comes to ride tuning.

12mm Bolted AXLE

Bolts are stronger, stiffer, and simpler. Which is exactly why all our bikes come with them, it simply makes sense.



Every aspect of this Turner Ti frame is designed and engineered in the USA. From the gorgeous CNC tapered head tubes to the proprietary dropouts, we have designed every aspect of the frame.

As you probably figured out from the great price and long list of standard features, this frame is imported. We found this factory when we were producing the carbon Flux frames years ago. Soon after we started developing the first Ti Cyclosys with them. Our frames are not the first or the only Ti bicycle frames they build, as they are a factory long known for building world-class titanium mountain and road frames. What drew us to this factory was their ability to taper and create butted titanium tubing, and their massive CNC capabilities allowing us to create exactly what we wanted with out cookie cutter head tubes, bottom brackets and dropouts. Even our chainstay bridge is CNC out of billet to be super thin and not create a mud shelf! 

T47 BB

‘T’ stands for threaded! Due to popular demand threads are back, and the new T47 offers bigger bearings & longer service life than older threaded standards. It will easily fit the larger and 30mm aluminum spindle creating a stiffer crank assembly, which is up to 18% lighter than the traditional steel spindle system.

Specifications subject to change without notice. 

Lifetime Warranty 

Proof of purchase is required, so save your original receipt to show model, serial # and date of purchase.This warranty does not cover normal wear and tear, nor does it apply to damage that is the result of abuse, improper assembly, poor maintenance, alteration or use other than intended. The costs of disassembly, shipping, reassembly or repair of any attached components are not covered by this warranty and are the responsibility of the original owner.

This warranty is void in its entirety by any modification of the frame, fork, or components. This warranty is expressly limited to the repair or replacement of a defective item, and said repair or replacement is the sole remedy of the warranty. This warranty is offered only to the original owner, and is not transferable. Turner Bicycles Inc is not responsible for incidental or consequential damages. Some states do not allow the exclusion of incidental or consequential damages, so the above exclusion may not apply to you. Proof of purchase is required, so save your original receipt to show model, serial # and date of purchase. 

Turner Bikes crash replacement program 

Sometimes accidents happen and you may need to replace a non-warranty damaged frame. We know how much you love your Turner Bike and understand the burden of having to replace a non-warranty damaged bike frame or part, Turner Bikes will make replacement parts available at a minimum charge to the original owner. Turner Bikes does this at its sole discretion and reserves the right to refuse this offer.

Our customer service rocks and our bikes ride like no other, but in the end, we want it to fit you.  If you cannot get comfortable on your new Turner Bike within 5 days of receiving it, give us a call and we will work out a solution, you may only need a different stem, or length of seat post. If that won't work, a different size frame can be swapped out.

Customer Reviews

Based on 28 reviews
Jim Marino
Nitrous boost

I’ve been on Turner bikes for a long time. Flux, 5 Spot, Burner, and now the Nitrous. At nearly 60 years old, I seriously thought I was going nuts to consider a hardtail again after all these years on a squishy. Been thinking about getting a Nitrous for quite a while, but when I ran into Dave and Christina on a local trail riding theirs, I knew it was time. Frame was ordered the next week. As always, Dave was a pleasure to do business with. As for the ride…..this is likely the smoothest, quickest, bike I have been on! The bottom bracket triangle stiffness provides great power transfer and the seat/chain stay shape provides just the right amount of vertical compliance. I have been on this bike everyday since getting it, I don’t get beat up, I’m climbing like a goat, and I am descending everything the same as when I was on the squishy. Sure, there are great manufacturers out there for it frames, but having ridden Turners for so long, with zero issues, I knew Dave had this frame dialed. If you are on the fence, go for it, you won’t be disappointed!

This bike has all the magic

For over a decade I’ve ridden hardtails that were overbuilt and stiff, even with premium materials. Not so with the Nitrous! Dave managed to design a balanced frame with lively acceleration, an unbelievably supple rear end, quick handling and a sturdy, reliable feel. The build quality exceeds the competition and you have to see the frame to truly appreciate it. This is my 6th ti frame from reputable manufacturers, all the previous ones have failed to deliver on the ride feel that makes the investment of titanium a bike for life. I can say without hesitation the nitrous is the unicorn I’ve been searching for. It delivers no matter where you ride it. This is what a hardtail should be, that magic ride you can’t get enough of. An absolute home run from Turner Bikes, I couldn’t be more thrilled with the Nitrous and the outstanding customer service from a true legend, Dave Turner.

Antonio Smith
2023 Turner Nitrous

This replaced my all full carbon race hardtail. I loved my old titanium El Mariachi and growing up in So Cal I always wanted a Turner. Enter Turner Nitrious. I wanted something more fun than my old race hardtail but still love the quick feeling of an xc bike. I built it up with xt groupset, dropper post, and a fox 34 130mm. The bike is a great all rounder. It climbs well and is snappy when you push it and makes descending steeper stuff easier than my older bike. I've noticed that it is really easy to bunnyhop and can really playful. I'd call it a dirt jumper that you can mountain bike on all day to sum it all up.

james hollen

Sweet frame great customer service. Met David at unbound and promptly ordered the frame when I got home.

Scott Bell
Love At First Ride

The 2023 Turner Nitrous is the best first ride I've ever had on any bike. That includes a sample size of over 15 bikes in the last 3 years alone. Lots of good first rides....some great first rides...and now this best first ride. Usually I stop along the trail and tinker with adjustments of all kinds...like tossing and turning on an ill-fitting mattress. I'm not a set-it-and-forget-it rider. But the Nitrous has been so well sorted by David Turner there's nothing for me to do but ride it. I'm not sure why everyone doesn't have this bike.

Size small frameset (I'm 5'-4") with 140mm DVO Diamond 51mm offset fork and 29" x 2.6 Rekon Tanwalls on 30mm wide rims. There is juuuust enough clearance for the 2.6 Rekon in the rear triangle. It's a beast in this mode - not sure I'll fork down at all. Running 170mm cranks and the BB height is perfect. This build is setup to cross nine streams at Sycamore Cove/Pt. Mugu, make a long single track climb, and then bomb down the newly re-worked Backbone trail. It's a workhorse disguised as a freshly minted coin. Simply lustrous.

Turner Bikes feel good to ride because they feel good when David Turner (DT) rides them. And he makes changes to the ride if it doesn't knock his socks off...I get the feeling that DT is almost always messing with the ride quality of his bikes so by the time any Turner product comes to market it's really well sorted. There's no break-in period with the Nitrous. It feels like an old friend - strangley familiar - neutral handling - balanced and intuitive - no surprises or odd behavioral issues. The titanium is really cool and my first titanium bike - the feel against the trail is lively and muted at the same time - resilient and responsive...and it feels expensive. The steering is telepathic even with the 51mm offset fork. I like the longer offset for small bikes because I feel they may not lean over as well as longer/larger size bikes. The longer offset allows some steering input with the hands. Old school for sure but it works for me.

The Nitrous is an exceptional bike and like I said before I'm not sure why everyone doesn't have a Turner titanium bike frame. But the best part of the purchase is the back and forth with David Turner. DT shoots the breeze like an old friend - his comments are balanced and neutral - he intuitively senses the opportunity to please you. In short, the man is like his bikes and the bikes are like the man. DT and Turner Bikes are so well regarded because there's no separation. It is and has always been about the quality of the ride....his ride....your ride....and mine!