Sector-9i-Rim-8 copy

Sector 9i Rim

The Lightweight Carbon Rim with an Innegra Armoured Jacket. Ride without fear with these mountain bike rims.


The Lightweight Carbon Rims with a Suit of Armour.

The 9i Mountain Bike Rim is waiting to be built into a world class Wheelset, ready to shrug off hits on the most technical trails around. Thanks to the addition of Innegra, the 9i Rim is incredibly strong, compliant and lightweight. Pair with your favourite Spokes and Hubs and have it your way; with the 9i Rim a ride changing upgrade is a just a Wheel Build away.

Redefining Carbon Wheels.

Ride without fear - thanks to the addition of TeXtreme® Innegra into the layup of our Rims, we've developed a Rim that has 75% higher impact resistance than standard Carbon Rims of the same profile*. The 9i Carbon Rims are significantly more resistant to wear and tear and less prone to catastrophic failure.
Our Innegra™ equipped MTB 9i Rims also have 50% more vertical compliance than standard Carbon Rim**. As a result they exhibit high energy absorption and superior vibration damping, with none of harsh stiffness associated with Carbon. These are Carbon Rims that have the sought-after ride characteristic of a premium alloy Wheelset.

Durable Doesn't Have to Mean Heavy.

At just 428g each, 9i is a lightweight, reactive and durable 29er Rim that can handle a beating. Now you can forget about protecting your Rims and concentrate on finding your flow in challenging trail conditions.
Click here to find out more about the development process and the use of Innegra.

*When compared with same Rim shape manufactured with 100% T700 Unidirectional Carbon Fibre. The 9i Rim exceeds the UCI load test of 100J – and passes a load test of 120J three times with no fracture.
**In Rim only vertical deflection tests compared to the same Rim shape manufactured with 100% T700 Unidirectional Carbon Fibre, the 9i Rim deflected 50% more, without failure.

Please Note:

These Rims are front and rear specific. Due to different spoke bracing angles of front and rear wheels, the drilling angle differs between front and rear rims. If buying a set please order one Front and one Rear Rim.

IMB Magazine - Issue 62

“Light, precise and comfortable, the 9i wheels are an innovative, high-performance wheel that can take some punishment."

Full Article Here

Sector 9i Rim
Rim Size 29"
Rim Material T-700 Unidirectional Carbon Fibre | Outer Layer: TeXtreme Plain Weave Spread Tow Carbon Fibre and Innegra S Hybrid
Holes 28h and 32h options
Rim Width (Internal) 29mm | (External) 35mm
Rim Depth 25mm
ERD 591mm
Tubeless Yes
Weight 428g


For full Wheel Builds, check out the Wheel Page.

For any other technical queries please get in touch -


All Sector Carbon Innegra Rims are guaranteed against manufacturing defects for the lifetime of the product, except decal defects, which are covered for one year only. If you damage your Sector Rim in an accident or crash, after two years of ownership (original owner only), we can offer a replacement Rim at a discounted price.

For full Warranty information Click Here.

So what is Innegra?

Innegra is a fibre derived from polypropylene that exhibits some highly beneficial properties, including high strength-to-weight ratio, resistance to damage, vibration damping and energy dissipation.
The TexTreme fabric used in the layup of 9i rim is a Spread Tow fabric built from a hybrid of Innegra and T700 carbon fibres.
The Spread Tow layout is significant because it also contributes some positive attributes – the fibres are straighter (reduced crimp therefore higher strength) and it facilitates the use of less resin (lower weight).
In the 9i rim the Spread Tow fabric is used on the outer layer of the rim, giving it the unique checkerboard pattern.

Spread tow fabrics are mechanically better than standard carbon fabrics for rim application

Sounds good, but what does that mean for a rim?

• Significantly more compliance...

Under a lab test the 9i rim was 50% more vertically compliant than a unidirectional T700 carbon rim of the same profile.
This test involves loading the rim with a 100kg weight, in which the 9i rim exhibited a deflection of 15.74mm compared to 10.55mm on the standard T700 rim.

It is widely acknowledged that vertical compliance is important for damage reduction (less likely to crack), a reduction of fatigue and to improve traction. Such an improvement in vertical compliance also brings a radically improved ride quality to the 9i wheelset.
The Innegra equipped rims do not have the associated harsh stiffness of regular carbon wheels.

Lovely riding wheels!

• Significantly more impact resistance...

In the lab the 9i rim was able to handle impacts of almost double the standard required for MTB wheels by the UCI.
The 9i rim withstood an impact of 140J compared the UCI stipulated requirement of an 80J impact, making it 75% stronger than the UCI requirements.
In real world terms, the 9i rim can handle the equivalent of dropping a 15kg weight from a height of up to 1.08 metres onto the bare rim, thus making it 18% stronger than a recognised leading competitor who has published their data.

Rock gardens? No problem

• Much less weight...

Despite offering strength and compliance advantages, the use of Innegra also allows the construction of an extremely lightweight rim. The Innegra equipped 9i rim weights just 428g (29”), and our complete wheelset weights just 1690g.

A wheelset for climbers to love

What about the rest of the wheel?

Every detail of our wheel builds is carefully considered, from the super smooth Revo Cream bearings to the straight pull triple butted Pillar spokes. And we back it all up with a lifetime manufacturing defect warranty.

Free Shipping in UK and Europe from the Sector website

IMB Magazine - Issue 62 - Tested & Reviewed by Ewen Turner

“The 9i wheels are pretty transformational when swapping out a set of stock aluminium wheels on a trail bike”

“Despite being lightweight and carbon, there is no harshness to the ride and other than the additional speed and reduced rolling resistance
they are easy to forget”

“Light, precise and comfortable, the 9i wheels are an innovative, high-performance wheel that can take some punishment, but as always
there is a limit. For those looking to find the limits, the DH9i rims are probably more appropriate whilst the 9i can definitely be
recommended for trail riding duties.”


Guy Kesteven - Published on 3 Sep 2019

SINGLETRACKWORLD (SEPT 2019) - Tested & Reviewed by Andi Sykes

"How do they ride? Well, they ride a lot like a good quality alloy wheel does, but with a little less rolling resistance which is nice on climbs and when sprinting out of corners.

Some carbon rims tend to be overly stiff, which might be great for a World Class Pro rider, but for me, I like my wheels to offer a level of compliance that helps me maintain contact with the ground and won’t give me arm pump after a rocky descent."

"The Sector 9i delivers. While notably lighter on the bike, and thus giving my long-travel 29er a more playful and lively ride, the compliance ensured my tyres held my poor line choice and dispersed shocks that might have normally found their way to my wrists.

Over the past few weeks, I’ve ridden the Sector 9i in all manner of terrain from loam, and mud to rocks and roots and I genuinely can’t fault them. They’ve performed very well and have lived up to the promise Sector made about compliance."


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