NITROUS TI FRAME
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CUSTOM TI TUBESET
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 Nitrous ahead of the pack when it comes to ride tuning.
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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.
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POST MOUNT DISC BRAKES
The rear post mount disc brake is seamlessly integrated for perfect alignment and rock-solid braking. No adapters, no fuss, just pure stopping power.
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12mm BOLTED AXLE
Bolts are stronger, stiffer, and simpler. Which is exactly why all our bikes come with them, it simply makes sense.
UPDATED AND TRUE TO ITS ROOTS
- 3D-printed chainstay ½ yoke – Awesome tire clearance to 2.6” and fits up to a 38T round chainring.
- Streamlined 3D-printed cable ports – Sleeker, smoother, and designed for hassle-free internal routing.
- No changes to geometry or tubing—because when something rides this well, why mess with it?
BUILT FOR MODERN SPEED
- UDH-Compatible: Ready for SRAM Transmission or any derailleur from the last decade.
- Multi-Port Internal Routing: Supports electronic or mechanical shifting and a stealth dropper post.
- Progressive XC Geometry: Longer, lower, slacker—for a ride that’s both fast and confident.
WHY A HARDTAIL?
- Not every trail needs full suspension—and with more sanitized trails, a hardtail is faster and more fun.
- More capable than a gravel bike when the going gets rough.
- Lighter and more responsive than a full-suspension bike on flowy, rolling terrain.
GEOMETRY AND DETAILS
| S | M | L | XL | |
|---|---|---|---|---|
| 1. RIDER HEIGHT | 5'1"-5'6" | 5'6"-5'10" | 5'10"-6'2" | 6'2"-6'6" |
| 2. EFFECTIVE TT | 590mm | 620mm | 640mm | 675mm |
| 3. SEAT TUBE | 370mm | 400mm | 430mm | 470mm |
| 4. SEAT TUBE ANGLE REAL | 75° | 74.5° | 74.5° | 74° |
| 5. HEAD TUBE | 85mm | 100mm | 125mm | 155mm |
| 6. HEAD ANGLE | 66.5° | 66.5° | 66.5° | 66.5° |
| 7. BB DROP | 62mm | 62mm | 60mm | 60mm |
| 8. CHAINSTAY | 435mm | 435mm | 440mm | 445mm |
| 9. REACH | 428mm | 448mm | 462mm | 478mm |
| 10. STACK | 610mm | 623mm | 644mm | 672mm |
| 11. WHEELBASE | 1140mm | 1166mm | 1200mm | 1241mm |
| 12. STANDOVER AT MID TUBE | 760mm | 775mm | 805mm | 835mm |
| 13. MAX POST INSERT | 240mm | 270mm | 300mm | 340mm |
FRAME SPECS
| NOTES | ||
|---|---|---|
| SEAT POST DIAMETER | 30.9mm | |
| HEADSET DIMENSIONS | ZS 44 top, ZS56 lower | |
| BB SHELL | T47 Threaded, 73mm | Use external bearing BB. |
| FORK LENGTH | 120-130 | (Geo based on 120 fork) |
| POST MOUNT 160MM REAR BRAKE | 180 max | |
| MAX TIRE CLEARANCE | 29'' x 2.6'' | |
| MAX BOOST CHAINRING SIZE | 36t oval 38t round | 52mm - 55mm chainline |
Customer Reviews
This is the fifth Turner bike that I have owned over the past 30 years..XC, 5-Spot, Burner, Flux, and now my new Nitrous.
Ordered the frame set only and was promptly received and is beautiful. I am selling a couple of bikes and building it up as I go. Would be nice to have an available phone number to confirm headset and bottom bracket sizing. Overall experience was great!
I've taken the Nitrous on a few rides now and wow, I feel right at home! So well balanced and it hits the sweet spot for me with handling. It's nimble and inspires confidence. And David was great to work with during the buying process, answering questions right away and helping me with fit. Couldn't be more pleased. Thank you!
First off, the customer service on this bike has been next level. I needed some guidance in terms of getting parts from my old bike to work on the nitrous, and some tips for cable routing. Dave was generous with his time and expertise.
I've put around 600 miles on my Nitrous at this point including singletrack, moderate jump lines, and bikepacking. So far it has shined all around. Coming from a medium Chumba Stella to a large Nitrous, the nitrous is far more capable descender, and a better climber as well I would say. Noticed a lot less front suspension bob on the nitrous than on the Stella. Landed top ten on a strava leaderboard for a local flow trail on the Nitrous, which was surprising as I don't chase Strava times, and I typically ride this trail on full suspension. For bikepacking the frame triangle is large enough to accommodate a decent size frame bag which is sweet. I was a bit overbiked for what turned out to be mostly gravel route, but for singletrack bikepacking the Nitrous would be perfect.
I'm 5'-9 or so, and the large feels right for me, with a short 40mm stem. Also, for anyone like me insistent on using cable brakes, I put a pair of Growtac Equal post mount brakes on, and also tried my TRP spykes, both fit very well.
Not much else to say. Turner has crafted a gorgeous frame that is an absolute joy to ride. I been riding since 1991- I thought i'd seen it all, but this bike has taught me new ways to ride and have fun on the trail. When you have a bike this well designed- all that's left is your skill, strength and creativity on the trail. David was fantastic to work with- so glad I went down this road.
