TB Electric Moto Pro Rear Shock

The TB Electric Moto Pro Rear Shock is a high-performance coil-over rear damper engineered specifically for the weight dynamics and suspension leverage curves of electric dirt bikes. Replacing inadequate factory shocks that suffer from pogo-stick rebound and harsh bottoming, the Pro Rear Shock delivers plush initial compliance, firm mid-stroke support, and progressive bottom-out resistance over rough terrain.

Featuring a hard-anodized CNC-machined 6061-T6 aluminum body and a nitrogen-charged external piggyback reservoir, the Pro Rear Shock maintains consistent hydraulic damping by preventing oil cavitation during rapid suspension cycling. Independent clicker adjustments for high-speed compression, low-speed compression, and rebound allow riders to dial in compliance for everything from rocky singletrack to motocross tracks.

The shock includes a high-tensile steel coil spring available in multiple spring rates (450 lbs to 650 lbs) to match rider body weight, plus an oversized spherical bearing eyelet design that accommodates chassis flex without binding.

Chassis Dynamics & Sag Calibration: Achieving optimal handling requires correct sag setup. Set preload on the coil spring until the rear suspension settles 25% to 30% of total stroke with the rider seated in full gear. Correct sag maintains proper head angle and steering stability.

Installation & Linkage Maintenance: Installing the shock is a direct bolt-on operation. Inspect, clean, and grease the rear suspension linkage pivot bearings and linkage triangle bolts before torquing mounting hardware to 35–40 Nm.

Companion Modifications: Pair the Pro Rear Shock with an EXT ERA fork cartridge kit up front, a GritShift Pro Peg Brace to reinforce the lower frame, and a TB Electric Moto full chassis skid plate to protect the lower linkage from rock strikes.

Frequently Asked Questions:

Q: How do I choose the correct spring rate for my weight? A: Riders under 160 lbs typically run a 450 lb spring; riders 160–190 lbs run a 500–550 lb spring; riders over 190 lbs should choose a 600–650 lb spring.

Q: What is the benefit of the external piggyback reservoir? A: The nitrogen-charged piggyback reservoir increases total oil volume and dissipates heat, preventing oil foaming and damping fade during aggressive trail rides.

Q: What adjustments can I make on the TB Pro Rear Shock? A: You can adjust spring preload, high-speed compression, low-speed compression, and rebound damping.

Q: Is this shock a direct bolt-on replacement for the stock Sur-Ron shock? A: Yes. It matches factory eye-to-eye length (267mm) and mounting width, bolting directly into stock linkage brackets.

Q: How often should the shock be serviced? A: Inspect spring preload and linkage bearings regularly, with a complete damper fluid flush recommended every 80 to 100 hours of ride time.

Damping Fluid Viscosity & Thermal Stability: The TB Pro Rear Shock is filled with high-viscosity-index hydraulic suspension oil engineered to resist thermal thinning. During extended downhill runs over rocky terrain where the damper shaft cycles thousands of times per minute, consistent oil viscosity prevents fade and keeps the rear tire glued to the trail.

Spherical Bearing Mounts & Linkage Articulation: High-stress off-road riding causes slight frame and swingarm flex. The TB Pro Rear Shock features spherical bearing eyelets that allow the shock body to articulate smoothly under lateral chassis loads without placing side-load bending stress on the hardened damper shaft.

Dual-Circuit Damping & Nitrogen Pressure Maintenance: The separate high-speed and low-speed compression circuits utilize precision-shimmed valving stacks that operate independently. The nitrogen reservoir maintains 150 PSI of internal pressure, preventing oil aeration during continuous high-frequency chatter.