🏆 SIRRIS R46 MAYHEM RACING TUNE | TOOL FREE LSC | E-Ride Pro SR ⚡

A custom Pro MX tune developed with Mayhem Racing. Full size R46 hardware on a compact e-moto 🔥

This is not the standard R46. It is a bespoke Pro MX valving package built by Sirris to a Mayhem Racing specification, fitted to the E-Ride Pro SR with a 317 mm eye to eye length and 81.2 mm of stroke.

You get the full size Ø46 mm high flow billet piston, the 16 mm induction hardened hollow shaft and a pressurised piggyback reservoir, with tool free external compression adjustment so you can change your setting between motos without digging for a screwdriver.

⚙️ Key Specifications

• 🏗️ Architecture: Piggyback, steel spring
• 📏 Stroke: 81.2 mm
• 📐 Length: 317 mm
• ⚖️ Weight: 3.9 lbs / 1.76 kg (without spring)
• 🔵 Piston: High flow Ø46 mm, CNC 6061 billet aluminium, type 3 hard anodised
• ⭕ Piston Band: Hard band
• 🔩 Shaft: Ø16 mm OD chrome plated, induction hardened steel, hollow, Ø5.5 mm ID
• 🛡️ Shock Body: Seamless 6061 aluminium, type 3 hard anodised, ACME thread
• 🔧 Spring Retainer: Seamless 6061 aluminium, type 3 hard anodised, ACME thread, locking feature, manual adjust
• 🧱 Bottom Out: MCU bumper
• 🪶 Top Out: Rubber bumper
• 💧 Damping: Custom Pro MX tune, LSC low speed compression, tunable compression and rebound
• 🛢️ Reservoir: Pressurised with floating piston
• 👆 Adjusters: Tool free external compression. Rebound adjusted using a tool
• 🧴 Seals: NBR

🏋️ Rider Weight Range

Sirris build this tune in a single weight range. Listed weight is rider weight without riding gear, with 15 lbs of gear already factored in.

• 🔵 Medium (140 to 180 lb): 75 N/mm spring

Outside that range? Message us. The R38 2SC for the SR covers 140 to 220 lb and may be the better fit.

📦 What's Included

• ✅ Sirris R46 Mayhem Racing Tune rear shock
• ✅ 75 N/mm steel spring
• ✅ Pressurised piggyback reservoir, factory charged
• ✅ Fitting hardware

🚀 Why Choose The Mayhem Racing Tune?

• 🏆 Race developed. A custom Pro MX valving spec, not an off the shelf tune
• 💪 Full size R46 internals. The Ø46 mm piston and 16 mm shaft from the big bike shock on a compact e-moto
• 👆 Tool free compression. Adjust between motos with your fingers
• 🛢️ Pressurised reservoir. Consistent damping as the oil heats up through a race day
• ⚡ Pairs with the F43 CMX fork. Front and rear working as one package

⚠️ Important — Please Read Before Ordering

🛠️ Made to order. Built to the Mayhem Racing specification. These are not held as generic stock items.

⏱️ Build time: approximately 5 to 20 working days.

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

📅 Total estimated lead time: approximately 2 to 6 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.

🏁 Single weight range only. This tune is built for a 140 to 180 lb rider. If you fall outside that, talk to us first rather than ordering and hoping.

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

📮 Order Tracking & Updates

Full tracking is issued the moment your shock leaves us. 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 whether the Mayhem tune or the R38 suits you? Message us before you order. We ride these bikes and we set this suspension up, so we will point you at the right spec rather than just take the sale 👊

Sirris R46 Mayhem Racing Tune. A race shop's spec, on your bike 🏆⚡

Shop now at WGTracing.store 🔥