Description
Tech Suspension ER34 Racing E-Moto Shock
The premium evolution of TECH's proven ER30, with a larger 34mm damping piston, a wider shim stack, a Kashima Coat® body and a DLC-treated shaft, all in the same external size as the ER30.
- 34mm piston - 28% more piston area than the ER30: less fade on long, hard rides and better high-speed control.
- Kashima Coat® body + DLC shaft - About 13% and 35% less friction, with better wear resistance over time.
- CTS tuning system - Swap Gold (light), Orange (mid, standard) or Green (firm) valves yourself. No specialist tools.
- Fully adjustable - Preload, rebound and low-speed compression, plus three spring rates.
- Piggyback reservoir - Temperature control plus a double-sealed internal floating piston for consistent performance.
- Length and Stroke - 283×80mm with TECH linkages for specific models.
Specifications and Compatibility
| Rebound | 24 clicks |
| Compression | 20 clicks |
| Preload | 0–20mm |
| Springs | 400 / 420 / 450 lbs/in (450 standard) |
| Spring material | High-tensile steel, made in Italy |
| Piston | 34mm, CNC 7075 aluminium |
| Body | CNC 7075 aluminium, Kashima Coat® |
| CTS valve | Orange (mid) fitted as standard |
Fits
- 283×80mm · E Ride Pro 3.0, 4.0 & SR (direct fit)
- 283×80mm · Surron Light Bee (with TECH linkage)
- 283×80mm · Ventus V1, V1+, V1+ Evo (TECH linkage + rear triangle)
- 283×80mm · 79Bike Falcon Pro / GT (with TECH linkage)
Fitment: With Included Linkage
- Surron Light Bee S
- Surron Light Bee X
- 79 Bike Falcon
- 79 Bike Falcon GT
- Ventus One
- Ventus One +
Direct Fitment: No Linkage Needed
- E Ride Pro S
- E Ride Pro SS 2.0
- E Ride Pro SS 3.0
- E Ride Pro SR
- Zero XB
The TECH ER30 Rear Shock is designed to be a perfect match in performance and balance with the TECH E39 E-Moto Front Fork!
KEY Specs:
- Specifically designed for lightweight E-Motos.
- Available in three different lengths.
- Specific TECH Suspension linkages for both Surron Light Bee and Talaria Sting models.
- CTS tuning technology - rider-changeable valves to easily tune the damping.
- Preload, rebound and low-speed
- compression adjustment.
- Two different spring rate options.
- Piggyback reservoir for optimal temperature control.
- Internal floating piston with double seals to ensure consistent performance.
- High-profile MDU bumper for end-of-stroke progression and bottom-out resistance.
- Designed, and assembled in Tuscany Italy.
Compression Tuning System (CTS)
The Compression Tuning System (CTS), developed by Formula & TECH Suspension is a set of easily interchangeable valves that let riders fine-tune compression damping to match their riding style.
CTS makes suspension tuning quick, simple, and completely reversible — no specialist tools or workshops required.
Simply remove the shock from the bike, release the pressure from the reservoir, and swap out the CTS valve.
This means e-moto riders can easily tune their shock for different types of riding - trail, motocross, technical enduro style or dirt jumps - without the need to visit a tuning specialist.
CTS provides the freedom to experiment with settings, while always offering a simple reset option if they want to return to their baseline setup.
The CTS system puts the benefit of TECH Suspension’s tuning expertise directly into your hands.
Available CTS Valves
Gold – Light Compression (optional, for smoother terrain)
Orange – Mid Compression (standard, factory-fitted)
Green – Firm Compression (optional, for aggressive riding)
As the curves in the graph show, the different valves provide unique damping profiles, from slower and softer to more reactive and stiffer.
Can I change the spring rate on my shock?
Yes, the available spring rates are:
We recommend that you have your spring changed by a professional mechanic.
How do I choose my spring rate?
Choose your spring rate based on your weight and riding style. Riders who ride aggressively on rough terrain and / or with big jumps should consider going up a spring rate. If in doubt, consult your local motorcycle shop or tuning specialist for help in setting up your shock for your weight and riding style.
How often does the shock need serviced?
As a general rule, we recommend the following procedures:
• check sag and air pressure - every month
• check piggyback reservoir pressure - every 3 months
• Oil change and complete inspection - once a year.
Please note this depends on the intensity of your riding and the conditions that you ride in. For example, if you are a racer or aggressive rider the interval decreases.