VERSATILE AND AGGRESSIVE

FOR THE FASTEST SPEEDS

SPECIFICALLY MADE FOR MODIFIED BIKES 

SIRRIS F43 FORKS

The F43 fork for Surron Ultra Bee is here. ITS TRUE MOTO ARCHITECTURE IS MADE FOR THE MOST AGGRESSIVE RIDING AND CAN BE TUNED TO YOUR LIKING.

TUNES TO RULE THEM ALL

Sirris offers a wide variety of tuning options to fit your riding needs. Choose from Trail, MX and EBMX Tunes.

The internal tuning is accomplished by mixing the perfect match of spring weight, compression settings, rebound settings, preload settings and oil weight. All are internally adjustable and serviceable by a trained technician or service center.

TUNING DETAILS
Rating of 1 means SOFT.
Middle rating means MEDIUM.
Rating of 10 means FIRM.
The rating of this product for "" is 5.

TRAIL TUNE

Our most versatile and aggressive tune. It’s sporty and supportive, designed for going fast over a wide variety of terrain.

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TUNING DETAILS
Rating of 1 means SOFT.
Middle rating means MEDIUM.
Rating of 10 means FIRM.
The rating of this product for "" is 5.

Firmer than our Hard Enduro tune, but still substantially capable on the nastiest terrain.

It’s also not a Moto tune, but delivers good bottoming resistance on g-outs and small jumps.

SHOP NOW
TUNING DETAILS
Rating of 1 means SOFT.
Middle rating means MEDIUM.
Rating of 10 means FIRM.
The rating of this product for "" is 5.

TRAIL TUNE

Our most versatile and aggressive tune. It’s sporty and supportive, designed for going fast over a wide variety of terrain.

SHOP NOW
Rating of 1 means SOFT.
Middle rating means MEDIUM.
Rating of 10 means FIRM.
The rating of this product for "" is 5.

Firmer than our Hard Enduro tune, but still substantially capable on the nastiest terrain.

It’s also not a Moto tune, but delivers good bottoming resistance on g-outs and small jumps.

SHOP NOW
TUNING DETAILS
Rating of 1 means SOFT.
Middle rating means MEDIUM.
Rating of 10 means FIRM.
The rating of this product for "" is 7.

EBMX TUNE

A tune specifically made for modified bikes in collaboration with EBMX.

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TUNING DETAILS
Rating of 1 means SOFT.
Middle rating means MEDIUM.
Rating of 10 means FIRM.
The rating of this product for "" is 7.

It's designed to work with a longer travel front fork (260mm) and is intended for a mix of light moto and aggressive trail.

It uses a firmer fork tune than Trail tune for bottoming resistance and a stiffer rear spring to handle increased bike weight and power delivery of EBMX components.

SHOP NOW
TUNING DETAILS
Rating of 1 means SOFT.
Middle rating means MEDIUM.
Rating of 10 means FIRM.
The rating of this product for "" is 7.

EBMX TUNE

A tune specifically made for modified bikes in collaboration with EBMX.

SHOP NOW
Rating of 1 means SOFT.
Middle rating means MEDIUM.
Rating of 10 means FIRM.
The rating of this product for "" is 7.

It's designed to work with a longer travel front fork (260mm) and is intended for a mix of light moto and aggressive trail.

It uses a firmer fork tune than Trail tune for bottoming resistance and a stiffer rear spring to handle increased bike weight and power delivery of EBMX components.

SHOP NOW
TUNING DETAILS
Rating of 1 means SOFT.
Middle rating means MEDIUM.
Rating of 10 means FIRM.
The rating of this product for "" is 8.

MX TUNE

A motocross specific tune with balance, control, and bottoming resistance for the fastest speeds.

SHOP NOW
TUNING DETAILS
Rating of 1 means SOFT.
Middle rating means MEDIUM.
Rating of 10 means FIRM.
The rating of this product for "" is 8.

Firm suspension for maximum control and support for huge jumps, whoops and fast cornering.

If you select the EBMX or MX spec, you’ll compromise a bit of trail plushness for improved bottoming resistance.

SHOP NOW
TUNING DETAILS
Rating of 1 means SOFT.
Middle rating means MEDIUM.
Rating of 10 means FIRM.
The rating of this product for "" is 8.

MX TUNE

A motocross specific tune with balance, control, and bottoming resistance for the fastest speeds.

SHOP NOW
Rating of 1 means SOFT.
Middle rating means MEDIUM.
Rating of 10 means FIRM.
The rating of this product for "" is 8.

Firm suspension for maximum control and support for huge jumps, whoops and fast cornering.

If you select the EBMX or MX spec, you’ll compromise a bit of trail plushness for improved bottoming resistance.

SHOP NOW
MOTO ARCHITECTURE

TRUE SYMMETRICAL CLOSED CARTRIDGE

BALANCED PERFORMANCE
No matter how hard you ride or how many laps you take, our closed cartridge forks will never fade and will always feel predictable.

HYDRAULIC BUMP STOP
Go big with confidence, control, and comfort. Our hydraulic bump stop design and construction gives you a soft landing at max stroke even on the most aggressive impacts.

HIGH TENSILE LIGHTWEIGHT SPRINGS
Weighs only 8.8 lbs (4 kg) per leg (standard configuration spring).

BUILT TO LAST

NO COMPROMISES

DUAL OIL CIRCUITS FOR OPTIMUM PERFORMANCE
Separating lubrication and damping oils allows us to further optimize high and low speed damping performance.

HIGH QUALITY MATERIALS + SURFACE TREATMENTS
All cartridge bodies and outer tubes are hard anodized 7XXX series aluminum providing high durability and scratch resistance to keep your ride in top condition.

ULTIMATE SUSPENSION TUNING

EVERY RIDER & RIDING STYLE

Fully tunable valving on compression and rebound, with spring rates matched to rider weight and riding type. Adapt your suspension setup for different types of rides, enhancing overall riding experience.

Compression, rebound, and preload adjust plus custom spring rates for all riding styles and rider sizes.

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TECH HELP

Suspension setup, owner's guide, tech help, warranty and more. Learn how to properly set up, use, and maintain your new Sirris suspension products.