Suspension travel is the maximum distance a bicycle’s shock absorber can compress, measured in millimeters (mm). For example, an 80mm travel rear shock will allow a maximum compression of 80mm from its fully extended position. This determines how much impact the bicycle can absorb on uneven surfaces.
The travel rear shock absorber is a bicycle suspension system that absorbs shock and provides a smoother ride. An 80mm travel rear shock length shows how far your bike’s suspension can move to handle bumps and rough trails. It helps make your rides smoother and keeps your bike stable on uneven ground.
This article provides a complete guide on 80mm travel rear shocks, explaining their specifications, benefits, and compatibility.
How Does Suspension Travel Affect Ride Style?
Shocks with short travel (80mm to 100mm) are great for climbing and cross-country trails. They offer a lightweight, efficient ride but aren’t built for big impacts. Longer travel shocks (over 100mm) provide better cushioning for rough trails and downhill riding but can reduce pedaling efficiency.
The amount of travel in your shock also affects your bike’s geometry. More travel can make the head tube angle slacker and lower the bottom bracket, offering more stability but reducing climbing efficiency. On the other hand, less travel can improve climbing but may reduce comfort on rough terrain.
What Is an 80mm Travel Rear Shock?
An 80mm shock-travel system is a rear suspension setup designed to travel 80mm while riding over bumps.
Who Should Use It?
- Cross-Country Riders: The lightest bikes built specifically for smooth racing and trail rides
- Trail Riders: Suitable for trail rides from light to moderately rugged without any big jumps or drops.
- Climbers: Great in climbs, enhances efficiency in pedaling.
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How to Measure Rear Shock Length for Bikes?
Eye-to-Eye Length
This is the distance between the two mounting points of the shock when it is fully extended. Your frame has to support this length. It usually falls somewhere in between 165 mm, 190 mm, or 200 mm, but check your bike manual for compatibility.
Stroke Length
Stroke length measures the distance the shock absorber shaft can travel during compression. For shocks with 80mm of travel, the stroke length is usually shorter (e.g., 38mm to 42mm). This is important because it determines how much travel the shock absorber can handle.
What Is the MTB Rear Shock Size Chart?
| Rear Shock Size (Travel) | Eye-to-Eye Length (mm) | Stroke Length (mm) |
| 80mm | 165mm | 38mm–42mm |
| 100mm | 190mm | 45mm–50mm |
| 120mm | 200mm | 50mm–55mm |
| 150mm | 216mm | 57mm–65mm |
| 170mm | 230mm | 60mm–70mm |
How to Use the Chart
- Check your bike’s specifications to find the recommended eye-to-eye and stroke length.
- Match those measurements with the chart to identify the compatible rear shock size.
- Use this chart when shopping for or replacing your bike’s rear shock.
Can I replace a 100mm rear shock with an 80mm one?
Yes, you can, but it’s not always ideal. Switching from a 100mm to an 80mm travel shock will lower the rear of your bike, affecting:
- Suspension Geometry: Your bike will feel stiffer.
- Ride Dynamics: It may reduce your control over bumpy terrains.
Pro Tip: Always consult your bike manufacturer or local bike shop to ensure compatibility.
Where does an 80mm travel rear shock work best?
Ideal Terrain
- Smooth trails with small obstacles.
- Rolling terrain where efficient pedaling matters.
- Light gravel paths.
Where It Struggles?
- Technical terrain with rock gardens.
- Downhill trails or large drops.
- Big jumps that need higher suspension travel.
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What are the benefits of 80mm travel rear shocks?
1.Lightweight Design
These shocks weigh less than longer travel shocks, making them ideal for racing and long climbs.
2. Improved Efficiency
Shorter travel means better energy transfer when pedaling. This makes the bike faster on flat and uphill terrain.
3. Affordable and Low Maintenance
Because they have fewer moving parts, 80mm shocks are easier and cheaper to maintain than longer travel shocks.
What are the Best Brands for 80mm Travel Rear Shock Length?
- Fox Racing Shox: At Fox, they pride themselves on making very high-performance shocks, great for cross country or trail riding.
- Rock Shocks: A brand providing top-notch, reliable, and adjustable shocks for all types of surfaces.
- Manitou: After several decades, Manitou developed really light and innovative shocks, especially for trail biking.
- Cane Creek: It has shocks that can be adjusted by the rider, personalizing their suspension adaptations for better performance.
- Ohlins: As a Swedish company with a racing background, they manufacture lasting, durable, and high-quality shocks now fast gaining acceptance in mountain biking.
- Marzocchi: Strong and reliable, designed to take a beating, providing bumps between the road and the rider.
- Push Industries: Custom-made, high-performance shocks for riders who like to personalize their tuning.
How to Install an 80mm Travel Rear Shock Length?
Remove the Old Shock
- Use the right tools, such as Allen keys or wrenches, to unscrew the mounting bolts.
- Carefully slide the old shock out, making sure not to damage the mounting hardware or the frame.
Measure Carefully
- Double-check the eye-to-eye length and stroke measurement of the new shock to ensure it fits your bike properly.
- If needed, refer to your bike’s manual for the precise dimensions.
Install the New Shock
- Position the new shock and align it with the mounting holes.
- Securely fasten the mounting bolts, tightening them evenly to avoid any misalignment.
- Test the suspension by compressing it a few times to ensure that everything is installed correctly and functioning as it should.
Tip: Regularly check the shock bolts after installation to ensure they remain tight during use.
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80mm Travel Rear Shock Length Chart
| Travel (mm) | Eye-to-Eye Length (mm) | Stroke Length (mm) |
| 80mm | 165mm | 38mm–42mm |
| 80mm | 190mm | 45mm |
| 80mm | 200mm | 50mm |
Maintenance Tips for Longer Life
- Clean after every ride: Dirt and mud can damage seals.
- Inspect for leaks: Oil leaks mean it’s time for servicing.
- Follow service intervals: Manufacturers recommend servicing every 50–100 hours of riding.
What Is an MTB Rear Shock Travel Calculator, and How Does It Work?
An MTB Rear Shock Travel Calculator is a device that helps a rider determine the rear wheel travel by considering the shock size and its suspension components. Essentially, this tool facilitates the calculation of the overall suspension efficiency of their mountain bike.
How Does It Function?
Typically, the calculator requires two key measurements:
- Shock Stroke Length: The maximum distance that the shock can compress.
- Leverage Ratio: The relationship between the rear wheel movement and the shock’s compression (often supplied by the bike manufacturer).
Formula for Travel Calculation
One commonly employed formula is:
Rear Wheel Travel = Shock Stroke Length × Leverage Ratio
For instance:
With a shock stroke length of 50 mm and a leverage ratio of 2.5:1, the rear wheel travel would be 125 mm (calculated as 50 mm × 2.5).
FAQs:
Can I Use an 80mm Shock for Big Jumps?
No, 80mm travel shocks are not designed for large jumps or aggressive downhill rides.
Can I use an MTB rear shock calculator for an 80mm travel shock?
Yes, an MTB rear shock calculator can help you determine the actual rear wheel travel by factoring in your bike’s leverage ratio and shock stroke length.
How much does an 80mm rear shock cost?
Prices range from $200–$800 depending on the brand and features.
Are adjustable 80mm travel rear shocks available?
Yes! Many models include rebound damping and compression adjustments to customize your ride.
Can I find reviews and user experiences on Reddit for 80mm travel rear shock length?
Absolutely! 80mm travel rear shock length Reddit threads are full of real-world reviews, comparisons, and feedback.
Conclusion:
An 80mm travel rear shock length is an excellent option for cyclists who value lightweight performance and effective pedaling. Although it may not be ideal for challenging trails or aggressive downhill descents, it shines on smoother surfaces, making it an excellent fit for cross-country and trail enthusiasts.
By selecting the appropriate shock and ensuring it is well-maintained, you can achieve a quicker and smoother ride.
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