Niner’s New Steel S.I.R.9 *UPDATED*

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* We’ve updated the story with some more photos, some more tech stuff and news of Niner’s new titanium cogs… *

At this year’s Press Camp, here in Park City, Utah, we were wondering what Niner might have in store for the world for 2013. Last year it unveiled the carbon JET9 RDO full suspension bike so there have been a few theories of what we might see this time round.

3D bent seat stays allow a 2.4 tyre
EBB allows easy geared or single speed setup.


Maxle 142mm rear end


It even comes with a seat QR (useful as it's a 27.2 post, so you're limited in dropper post options.)


Could it be another carbon frame? With the advent of stiff, longer travel forks like the Fox 34, perhaps Niner has been working on a burly carbon long travel 29er version of its W.F.O. frame? Or perhaps we could be seeing an even lighter XC machine?


So… with much ado, here’s the new bike (for the moment) from Niner. It’s… a…


…29in steel hardtail.

The S.I.R. is dead. Long live the S.I.R.!
Easy to single speed too.



Yep, that’s right. Rather than go all-out to wow the world with another carbon bike that only a few people could afford, Niner has instead redesigned one of its most popular and accessible models and so is updating a bike that more of us could see our way to affording. Since the S.I.R. (Steel Is Real) first came out in 2006, many things have changed and improved in bike frame and component technology, so this is Niner’s go and bringing it right back into line.

In the last six years, there have been many improvements and changes, so Niner has tried to incorporate as many as is sensible: up front is a 44mm head tube to run a tapered fork, then there’s the custom-bent Reynolds 853 downtube to give decent fork clearance.

142mm dropouts. Niner will be offering titanium sprockets soon too.


Rear brake is tucked between seat and chain stays


Plate bridge helps with the 2.4in tyre clearance.




As many riders appreciate the option to run singlespeed, perhaps in the winter, there’s Niner’s own EBB, which relies on bolts tightening the EBB onto the face of the BB shell, rather than on grub screws or wedges. The downtube gear bosses unbolt too if you need them gone.


Out back, past the neat chainstay and seat stay bridges, is a 142mm bolt-thru rear Maxle. This gives the frame as rigid a structure as possible with those big wheels.


Bare frame is sub-5lbs and the frame as sold, with EBB, Maxle and seat collar is 5.25lbs.


Retail price on the frame is £899 and available to shops through Jungle.



Comes in white too. Needless to say, matching Niner carbon forks are available.



Expect to see the new S.I.R. in the UK late summer or so…

And now here’s the new stuff!

Niner will soon be doing some titanium single speed cogs, going from about 16T up to 23T

Cogalicious… apparently.

Big cogs for low gears and small cogs for high gears. That's how it works apparently.
A 17T and a 23T - all cogs have wide bases to help not chew up your cassette body.
Niner also has a carbon fibre 'flex post' to take the hardtail sting out of the trail
The new S.I.R. frame is coming out in a couple of months, but if you want one before, Niner is running an ebay auction right now to get the first six bikes with special IMBA decals. All the proceeds will go to IMBA.

We just like this seatstay bridge.
Some of the clever frame components, showing the socketed derailleur or singlespeed thru-axle dropouts.

Incidentally, the EBB has now been upgraded to a double bolt system that should eliminate the creaks that a few riders have found with the original design…

Geometry – someone was asking…

71.3/73.3 (with 80mm fork)  70.3 /72.3 with 100mm fork  for the M/L/XL – half a degree slacker for the Small.

Top tube is 592mm/609mm/628mm/647mm for the S/M/L/XL respectively. Any other requests?





Singletrack Editor

Chipps wasn’t around for the dawn of mountain biking in the UK, but he likes to claim that he arrived in time for second breakfast (about the time he shows up for work, then…) starting in the bike trade in 1990 and becoming a full time mountain bike journalist at the start of 1994. Over the subsequent quarter century, he has seen mountain bike culture flourish and diversify and bike technology go from rigid steel frames to fully suspended carbon fibre (and sometimes back to rigid steel as well.)

His riding style is best described as ‘medium, wheels on the ground, trail riding’ though he’s been spotted doing everything from endurance downhill racing to 24 hour cross country racing. He favours mid-travel trail bikes and claims to be wheel-size, gear, brake and tyre agnostic. In fact, his garage spans most bicycle flavours, taking in steel hardtails, carbon trail bikes, even a mountain bike tandem, along with road, touring and gravel/cyclocross bikes.

While he’s happy to chat about bikes all day, his real interest is in the people and places that bikes can introduce you to and he talks as fondly about the trails he’s ridden and riders he’s met as the bikes that took him there.

Comments (14)


    Mrs Fascist is unlikely to let me order another new bike this year though, so this may have to wait till next spring 🙂

    Very interesting brake mounting for the rear seat and chain stay. VERY neat.

    I’ll still be having a Solaris though if I ever have the money.

    Awesome! my SIR 9 has been the best, fastest and most succesfull bike i’ve owned this looks even better!

    Could do with someone making a 142x12mm SS hub though…

    “another carbon bike that only a few people could afford”

    So £899 is cheap – what does the extra £400 buy you over a Solaris – EBB and bolt through rear. Nice bikes but way over priced in the UK.

    Oh – and all the the nightmare EBB stories on mtbr too.

    Loving the “limited in dropper” comment. It’s true you’re limited to the only dropper that actually works.

    lumme that is a nice colour….*wants*

    ratherbeintobago said: “Could do with someone making a 142x12mm SS hub though…”

    Hope Pro2 and Pro2 EVOs are convertible to 12×142 in their geared variants, I’m assuming the SS version is the same axle or are the bearing centres different?

    “Hope Pro2 and Pro2 EVOs are convertible to 12×142 in their geared variants, I’m assuming the SS version is the same axle or are the bearing centres different?”

    Apparently not – see the threads on the forum about this.

    I could be tempted to try a 29er with this!

    Ooo…. that IMBA version looks lovely.

    Very pretty, now something in this sort of spec and finish from a mass producer in 650b and we’re laughing.

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