OUR STIFFEST SETUP FOR THE FASTEST RIDERS
Developed in collaboration with Josh Hill to deliver the ultimate suspension solution for riders who push the limits. With extended travel to 260 mm, precision-engineered billet aluminum clamps, updated drop outs, firmer damping and spring rates, a reinforced bottom-out circuit, and increased oil volume, this setup is built for those who ride fast, race hard, and demand the absolute best. If you're not hitting 50+ foot jumps, this is not for you.
F43 SX Tune | LSC | 260 mm Travel
Description
Sirris offers two weight ranges when selecting your SX Tune F43 fork. (Listed weight ranges are rider weight without riding gear on. 15 pounds of riding gear is calculated into the weight ranges)
< 160 lbs (Light = 5.4/5.0 springs)
> 160 lbs (Medium = 5.8/5.0 springs)
Fork spring rates listed above are left side/right side.
FORK SPECS:
Architecture
Upside down fork
Travel
260 mm
Free length
856 mm
Fork weight, includes clamps and steerer
22 lbs / 10kg
Stanchions
Ø43, high tensile steel with hard chrome
Outer tubes
Seamless 7050 aluminum, type 3 hard anodized coating
Drop outs
Forged 6061 aluminum, type 3 hard anodized coating
Triple clamps
Billet 6061 aluminum, type 2 anodized coating, 4 color options (blue, red, gold, black)
Steer tube
Seamless 7050 aluminum, type 2 anodized coating
Damping
Symmetrical, adjustable closed cartridge with spring backed modified IFP
Damper bodies
Seamless 7050 aluminum, type 3 hard anodized coating
Rebound
Dual side high tensile steel spring, adjustable
Adjusters
External compression and rebound adjustment
Seals
NBR
Guards
High impact PP, 210-degree wraparound
SX TUNE
Extra stiff to handle the biggest hits. Period.
WARNING: If you are not a sponsored or pro rider, this suspension will be too firm for you.
Josh hill wanted to push the Ultra bee past its limits. we answered.
If you're not hitting 50+ foot jumps, this is not for you.
SX TUNE
Extra stiff to handle the biggest hits. Period.
WARNING: If you are not a sponsored or pro rider, this suspension will be too firm for you.
Josh hill wanted to push the Ultra bee past its limits. we answered.
If you're not hitting 50+ foot jumps, this is not for you.
SX AND MX FORKS EXPLAINED
Do the SX forks have more travel than MX forks, and why?
Yes, SX forks have 260 mm of travel unlike the other forks with 246 mm of travel. More travel is needed for larger impacts and faster speeds.
Are the triple clamps different?
Yes, the SX forks have billet 6061 aluminum clamps instead of forged. They are about 50% stiffer than forged clamps found on Trail and MX forks.
Is there an upcharge for the different clamp color options?
No. Price is the same for all four billet clamp colors. Choose from blue, red, gold, or black!
What else makes the SX forks different from MX forks?
Overall stiffer steup. SX forks have different fork position in top clamp, heavier damping, stiffer bottom out circuit, greater oil volume and heavier spring rates.
I'm a pretty fast rider, is this too stiff for me?
Most likely. SX forks and shocks were designed in collaboration with Josh Hill to be the stiffest setup to handle the biggest hits. We recommend SX tune for pro-level riders only.
Can I buy just the new billet clamps in the multiple color options for my existing Trail Tune or MX Tune forks?
Yes. The blue, red, gold, and black billet clamps will be available soon for purchase for our other forks.
Can I get the new billet clamps in the multiple color options for new Trail Tune or MX Tune forks?
Yes. The blue, red, gold, and black billet clamps will be available soon for purchase as an upcharge item for our other forks.
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).
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.
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.
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.
