To prevent bottoming on your adventure bike, increase compression damping by turning the adjuster clockwise in small increments (usually 2-3 clicks at a time). Start with high-speed compression adjustments if available, as this controls how your suspension handles big impacts. Test ride after each change on the terrain where bottoming occurs, and keep notes of your settings. If you’re riding with luggage, you’ll need additional compression damping to compensate for the extra weight.
What does compression damping actually do on adventure bike suspension?
Compression damping controls how quickly your shock absorber compresses when you hit a bump, rock, or pothole. Think of it as resistance that slows down the suspension movement. Without enough compression damping, your suspension would collapse too quickly and bottom out harshly. With too much, your bike feels stiff and uncomfortable, and the suspension can’t absorb impacts properly.
There are two types of compression damping that work together. Low-speed compression handles gradual movements like weight transfer when you brake or corner, and when you’re riding over rolling terrain. High-speed compression manages sudden impacts from rocks, roots, potholes, or landing after catching air. The terms “low-speed” and “high-speed” refer to how fast the shock shaft moves, not how fast you’re riding.
When you’re riding an adventure bike off-road or on rough tarmac, proper compression damping keeps your suspension in the middle of its travel range. This means you have cushioning available for both small bumps and big hits. If your compression damping is too soft, the suspension uses up its travel too quickly, and you bottom out when you hit larger obstacles or brake hard.
How do you know if your compression settings are causing bottoming?
The clearest sign of insufficient compression damping is a harsh clunk or bang when you hit bumps, especially during hard braking or on rough descents. You’ll feel the impact travel through the bike and into your body. Your suspension is running out of travel and hitting the internal bump stop. This isn’t just uncomfortable, it reduces control and can damage your suspension over time.
Check the o-ring position on your shock shaft after a typical ride. Most shocks have a rubber o-ring that slides along the shaft and shows how much travel you’re using. If it’s consistently pushed all the way to the end of the shaft, you’re using full travel too often and likely bottoming out. For normal riding, you should use about 70-80% of available travel, with the last 20-30% reserved for big hits.
Pay attention to specific situations where bottoming happens. Does it occur when you brake hard while loaded with luggage? When you hit a pothole at speed? On successive bumps where the suspension doesn’t have time to recover? These scenarios tell you what type of compression damping needs adjustment. Bottoming during braking or with luggage usually points to low-speed compression being too soft. Bottoming on sharp impacts means high-speed compression needs attention.
Physical sensations that indicate problems
Your hands and backside are excellent diagnostic tools. If you feel harsh impacts coming through the seat or bars on terrain that should be manageable, your compression damping is likely too soft. The suspension is moving too quickly through its travel and hitting bottom. You might also notice the front end diving excessively under braking, or the rear squatting significantly when you accelerate with luggage.
What’s the step-by-step process for adjusting compression damping?
Start by finding your compression adjusters. On most adventure bike shocks, you’ll find them at the remote reservoir (the separate cylinder connected by a hose) or on the shock body itself. High-speed compression adjusters are often marked with “HSC” or have a larger adjustment screw. Low-speed compression is marked “LSC” or has a smaller adjuster. Some shocks have only one compression adjuster that affects both.
Before making changes, write down your current settings. Count the clicks from full soft (turned fully counter-clockwise) to where you are now. This lets you return to your starting point if needed. If you don’t know your current settings, turn the adjuster gently clockwise until it stops (don’t force it), count that as zero, then turn it counter-clockwise while counting clicks until it stops in the other direction. That’s your total range.
For bottoming issues, start with high-speed compression if your shock has separate adjusters. From your current setting, add 2-3 clicks clockwise (towards the plus sign or “H” marking). If you only have one compression adjuster, make the same 2-3 click adjustment. Now ride the same terrain where you were bottoming out. Really test it with the same speed and intensity.
Testing and refining your adjustments
After each adjustment, ride for at least 10-15 minutes on varied terrain. Hit the bumps and obstacles that were causing problems. Check your o-ring position. Did you still bottom out? If yes, add another 2-3 clicks of compression damping. If the ride feels harsh and you’re getting bounced around, you’ve gone too far and need to back off 1-2 clicks.
If you’re adjusting low-speed compression for issues with braking or loaded riding, test it in those specific situations. Brake hard from speed. Ride with your typical luggage load. The suspension should feel controlled without diving or squatting excessively. You’re looking for a balance where the bike handles weight transfer smoothly but doesn’t use excessive travel.
Keep a simple log in your phone. Note the date, settings (number of clicks from full soft), riding conditions, and how it felt. This information becomes valuable when conditions change or when you switch between solo and loaded riding. You’ll develop a reference guide specific to your bike and riding style.
Should you adjust preload or compression first to fix bottoming?
For bottoming on big hits or rough terrain, adjust compression damping before preload. Compression damping controls how fast your suspension moves through its travel, which directly affects bottoming resistance. Preload adjusts ride height and sag, which affects how your suspension sits and responds to small bumps, but it doesn’t add much bottoming resistance on hard impacts.
Think of it this way: preload sets your starting point, while compression damping controls the speed of movement. If you’re sitting at the correct ride height (proper sag) but still bottoming out, adding preload will raise the bike and make it sit higher, but the suspension will still compress at the same rate when you hit something hard. You’ll just be starting from a higher position with less available travel, which often makes the problem worse.
That said, preload and sag should be set correctly first as your foundation. For adventure bikes, you typically want 30-35% sag (the amount the suspension compresses under your weight). If your sag is way off, fix that before adjusting compression damping. But if sag is reasonable and you’re still bottoming, compression damping is your answer.
When preload does help with bottoming
Preload becomes relevant when you’re riding with significantly more weight than usual. Adding luggage and a passenger might require some additional preload to maintain proper sag. But even then, you’ll likely need more compression damping too. The added weight compresses the suspension faster and harder, so you need both the correct starting height (preload) and appropriate damping to control the movement.
How does riding with luggage change your compression settings?
Adding luggage to your adventure bike significantly increases the forces on your suspension. The extra weight compresses the suspension more during normal riding, and it adds momentum during impacts, making bottoming much more likely. You’ll typically need 3-5 additional clicks of compression damping when switching from solo to fully loaded touring. The exact amount depends on how much weight you’re carrying.
Start by adding 3 clicks of compression damping (both high and low-speed if you have separate adjusters) when you load up for a trip. Test ride with your actual luggage configuration before heading out. Pay attention to how the bike handles braking, acceleration, and rough sections. If you’re still bottoming out or the o-ring shows you’re using full travel regularly, add another 2 clicks.
Many adventure riders develop two baseline settings: one for solo riding and one for touring with luggage. Write both settings down and keep them in your phone or tank bag. When you pack for a trip, adjust your suspension before you leave. This takes two minutes and dramatically improves how your loaded bike handles. Some riders adjust compression on the fly during a trip as they use up fuel and supplies, reducing the bike’s weight.
The relationship between weight and suspension behaviour
Remember that luggage weight doesn’t just affect how much your suspension compresses at rest. It changes the entire dynamic behaviour of your bike. More weight means more momentum during impacts, harder braking forces, and different weight transfer characteristics. This is why you need more compression damping, not just more preload. The damping controls how that additional mass moves through the suspension travel.
If you frequently switch between solo and loaded riding, consider making compression adjustments part of your pre-ride routine, just like checking tyre pressure. The difference in handling and comfort is significant enough to justify the small effort. Your suspension will work properly in both configurations rather than being a compromise that’s not quite right for either.
Need custom suspension solutions for your adventure bike?
We approach compression damping and bottoming prevention through custom tuning that matches your specific bike, riding style, and typical load. Rather than offering generic settings, we analyse how you actually ride and what you’re carrying. This means your suspension works properly whether you’re commuting solo or loaded for a multi-week adventure.
Our suspension systems feature adjustable high-speed and low-speed compression damping that gives you precise control over bottoming resistance. More importantly, we can custom-valve your shock to provide the right damping characteristics for your weight, riding intensity, and typical terrain. This often means you need fewer clicks to switch between riding configurations, and the suspension performs better across its entire range.
If you’re struggling with bottoming issues that don’t resolve with adjustment, or if you want suspension that’s properly matched to your adventure bike and how you use it, explore our suspension options. We’d be happy to discuss your specific situation and recommend solutions that actually work for your riding. You can contact us to talk through what you’re experiencing and get advice on whether adjustment or custom suspension makes sense for you.
Frequently Asked Questions
Can I damage my suspension by adding too much compression damping?
You won’t damage the suspension mechanically by turning the adjusters too far clockwise, but excessive compression damping makes your suspension work poorly. The shock becomes too stiff to absorb impacts properly, causing harsh ride quality and reduced traction as the tire skips over bumps instead of following the terrain. If you’ve added so much damping that the ride feels jarring and uncomfortable, simply back off the adjusters 2-3 clicks at a time until you find the right balance.
How often should I check and readjust my compression settings?
Check your compression settings whenever your riding conditions change significantly—such as adding or removing luggage, changing terrain types, or at the start of each riding season. During a typical ride, check the o-ring position every few weeks to ensure you’re not consistently using full travel. Many riders find their optimal settings remain stable for months of similar riding, but it’s smart to reassess when you notice bottoming or harsh impacts returning.
What if I've maxed out my compression adjusters and still bottom out?
If you’ve turned your compression adjusters all the way clockwise and still experience bottoming, your suspension likely needs revalving or replacement with a shock better suited to your weight and riding style. This often happens when riders are significantly heavier than the stock suspension was designed for, or when carrying very heavy loads regularly. Contact a suspension specialist to discuss custom valving or upgraded shock options that provide the damping range you actually need.
Is it normal to use different compression settings for front and rear suspension?
Absolutely—front and rear suspension work differently and handle different loads, so they typically require different compression settings. The front handles most braking forces and steering inputs, while the rear manages acceleration and luggage weight. Adjust each end independently based on where you’re experiencing problems. Many riders find they need more compression damping in the rear when touring with luggage, while front settings may change less dramatically.
How do I know if my bottoming problem is actually a worn-out shock rather than wrong settings?
A worn shock will feel inconsistent, may leak oil (visible wetness on the shaft or body), and won’t respond predictably to adjuster changes. If you make significant compression adjustments but feel little or no difference in ride quality, or if the shock feels harsh on small bumps but still bottoms on big hits, internal wear is likely. Also check for unusual noises, excessive heat after riding, or visible damage to seals—these all indicate the shock needs service or replacement, not just adjustment.
Can weather or temperature affect my compression damping settings?
Yes, temperature significantly affects suspension oil viscosity. In cold weather, suspension oil thickens and provides more damping resistance, which can make your suspension feel stiffer. In hot conditions, oil thins out and damping decreases, potentially leading to bottoming if your settings were borderline. If you ride in extreme temperature variations, you may need to adjust compression damping by 1-2 clicks seasonally, adding damping for summer heat and reducing it for winter cold.
Should I adjust compression damping differently for street versus off-road riding?
Yes, off-road riding typically requires less compression damping than street riding at the same speed. Off-road terrain needs more suspension compliance and travel to absorb rocks, roots, and irregular surfaces, while street riding benefits from firmer damping for stability at higher speeds and during aggressive braking. Many adventure riders develop separate baseline settings for each environment and adjust before transitioning between street and dirt, which takes just a minute but significantly improves performance in each setting.
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