🏆 SIRRIS F43 TRAIL TUNE | 246 MM TRAVEL | Sur Ron Ultra Bee ⚡

The most versatile fork Sirris build. Sporty, supportive and built to go fast over absolutely anything you point it at 🔥

The F43 Trail Tune is a very versatile and aggressive tune that is sporty and supportive, designed to go fast over a wide variety of terrain. It is firmer than the Hard Enduro tune while still staying fully capable on difficult technical terrain, and it delivers seriously good bottoming resistance on g-outs and small jumps.

True upside down moto architecture, a symmetrical closed cartridge damper and 246 mm of usable travel. This is not a modified bicycle fork. This is a proper motocross grade front end built specifically for the Sur Ron Ultra Bee.

⚙️ Key Specifications

• 📏 Travel: 246 mm
• 📐 Free Length: 856 mm
• ⚖️ Weight: 22 lbs / 10 kg (includes clamps and steerer)
• 🏗️ Architecture: Upside down fork with true symmetrical closed cartridge
• 🔩 Stanchions: Ø43 mm high tensile steel with hard chrome
• 🛡️ Outer Tubes: Seamless 7050 aluminium, type 3 hard anodised
• 🔧 Drop Outs: Forged 6061 aluminium, type 3 hard anodised
• 🎯 Triple Clamps: Billet 6061 aluminium, type 2 anodised
• 🗜️ Steerer Tube: 7050 aluminium, type 2 anodised
• 💧 Damping: Symmetrical adjustable closed cartridge with spring backed IFP
• 🎛️ Adjusters: External LSC (low speed compression) and rebound adjustment
• 🔄 Rebound: Dual side high tensile steel spring, adjustable
• 🧴 Seals: NBR
• 🛡️ Guards: High impact PP, 210 degree wraparound

🏋️ Rider Weight Ranges & Spring Rates

Sirris supply the F43 Trail Tune in six spring rate options so the fork is set up correctly for your weight straight out of the box. Listed weights are rider weight without riding gear.

• 🟢 Light (130 to 160 lb): 4.0 / 4.0 springs
• 🔵 Medium (160 to 210 lb): 4.8 / 4.4 springs
• 🟡 Heavy (210 to 230 lb): 5.0 / 4.8 springs
• 🟠 X Heavy (230 to 250 lb): 5.0 / 5.0 springs
• 🔴 XX Heavy (250 to 280 lb): 5.4 / 5.0 springs
• ⚫ XXX Heavy (280 to 350 lb): 5.8 / 5.4 springs

Spring rates are listed as left side / right side.

📦 What's Included

• ✅ Pair of Sirris F43 Trail Tune forks, 246 mm travel
• ✅ Billet 6061 triple clamps (top and bottom)
• ✅ 7050 aluminium steerer tube
• ✅ 210 degree wraparound fork guards
• ✅ Springs matched to your selected rider weight range
• ✅ Fitting hardware

🚀 Why Choose The F43 Trail Tune?

• ⚡ Go faster everywhere. The most versatile tune in the F43 range, equally at home on trails, tracks and technical terrain
• 💪 Real bottoming resistance. Handles g-outs, drops and small jumps without blowing through the stroke
• 🎯 Proper closed cartridge damping. Consistent feel lap after lap with no fade as the oil heats up
• 🛠️ Tuned for your weight. Six spring options mean no expensive respring after purchase
• 🏁 Moto grade build quality. Hard chromed 43 mm stanchions and hard anodised 7050 tubes built to survive real abuse
• 🔧 External adjustment. Dial in compression and rebound trackside without stripping anything down

📉 Optional Lowering Kit

Not everyone wants full height. Select the Lowering Kit Installed option at checkout and the forks are supplied with the Sirris lowering kit professionally fitted before dispatch. Ideal for shorter riders or anyone wanting a lower centre of gravity for supermoto and flat track use.

⚠️ Important — Please Read Before Ordering

🛠️ Made to order. Every F43 is built and valved to your selected spring rate. These are not held as generic stock items.

⏱️ Build time: approximately 5 to 15 working days.

🚚 Shipping time: approximately 5 to 10 working days depending on destination.

📅 Total estimated lead time: approximately 2 to 5 weeks from order. These are estimates and are not guaranteed.

🚫 Once your build has entered production, the order is non cancellable and non refundable due to the bespoke spring rate, valving and labour involved. If a lowering kit is selected this also applies to the fitting labour.

💬 We will keep you updated at every stage, from build confirmation through to dispatch.

📮 Order Tracking & Updates

Full tracking is issued the moment your forks leave us. Please note that once the parcel is with the courier, transit times are outside of our control and occasional courier delays can happen, particularly on international shipments. International customers may be responsible for any duties and taxes charged on import.

❓ Got Questions?

Not sure which weight range or tune is right for you? Message us before you order. We ride these bikes, we set these forks up, and we will point you at the right spec rather than just take the sale 👊

Sirris F43 Trail Tune. The fork that turns your Ultra Bee into a real dirt bike ⚡🏆

Shop now at WGTracing.store 🔥