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Suspension fork too stiff even after adjusting preload.

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Suspension fork too stiff even after adjusting preload.

Old 05-31-18, 07:44 AM
  #1  
delicmaro
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Suspension fork too stiff even after adjusting preload.

I have a B'TWIN Rockrider 520, a 27,5" hardtail with aggressive geometry and amazing handling. It is everything I could have asked for, since it's good for trails and for street. However, it comes with a 80mm fork which (for me at least) is way too stiff. My friend has the same bike with no upgrades on it and his fork is fine, but mine requires a LOT of force to compress, no matter how low I set the preload to. I'm not such a light guy, so that is definitely not the issue. Do I have to buy a new fork or is there something else I can do to help with this?
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Old 05-31-18, 07:47 AM
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Brand of fork? Air or coil? Air psi? Your weight? Is it locked out?
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Old 05-31-18, 12:34 PM
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Originally Posted by Leebo
Brand of fork? Air or coil? Air psi? Your weight? Is it locked out?
Fork is the SR Suntour XCT 80mm (unknown fork to me tbh), it's a coil. I weigh 92 kg, and it has no setting for locking out. I saw a video on YouTube of some guy showing how to adjust the fork and I realized that when I adjust the preload it doesn't click. Also it's really hard to turn the preload knob, had to use pliers to do it.
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Old 05-31-18, 12:41 PM
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Honest talk: that's a really cheap bike. No idea about the fork. It could be excessive friction in the seals, the hydraulic damper (if it has one) could be malfunctioning, or it could indeed be too stiff of a spring. A good mechanic might be able to resolve the issue but unless you can warranty the fork its in no way worth getting repaired.

Generally speaking you'd be best served by buying a higher quality bike--the relative value will be greater than buying a new fork. If you really are otherwise happy with the bike, something like a Rockshox Recon or even a Suntour XCM.
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Old 06-01-18, 08:23 AM
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Originally Posted by delicmaro
Fork is the SR Suntour XCT 80mm (unknown fork to me tbh), it's a coil. I weigh 92 kg, and it has no setting for locking out. I saw a video on YouTube of some guy showing how to adjust the fork and I realized that when I adjust the preload it doesn't click. Also it's really hard to turn the preload knob, had to use pliers to do it.
Two things...

1- That is a really cheap fork. Do not expect the adjustments to do much. And 80mm is not much to start with. Some nicer forks can be tuned to your specific weight and riding style to make the most of 80mm, but that is not the case with this one.

2- As a general rule, if an adjustment knob on a fork is so stuck that you need pliers to turn it, something is wrong with it, and you likely made it worse by taking a pair of pliers to it.

3- if this is a coil fork, you canít really stiffen or soften the suspension action much without swapping the stock coil spring for a stiffer or softer one.

EDIT: oops, that was three....

Last edited by Kapusta; 06-01-18 at 11:00 AM.
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Old 06-01-18, 10:38 AM
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stykthyn
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Pre load on that fork adjusts sag. It has nothing to with the firmness of that fork.
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Old 06-08-18, 08:28 AM
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Does it have rebound adjustment? Contact suntour. or your bike shop.
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Old 06-08-18, 11:19 AM
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I echo inexpensive but I donít say bad. A cheap fork can take a hit or land a wheelie, even if itís not damped. And they are simple and durable. Something is likely broken in yours. If you feel competent to take it apart yourself thereís exploded views and manuals and parts for sale on SR Suntourís site. Itís about as complicated as a shower curtain rod. If you donít, take it to a shop... especially if itís still under warranty
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Old 06-12-18, 03:26 PM
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You might want to look into the Suntour fork trade in program. I did it on my first bike which was a Giant Talon. They will give you a trade in towards upgrading your forks. If you love the rest of the bike that would be the best bang for your buck.
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Old 06-13-18, 09:57 PM
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Better Sus forks cost more than the bike you own.

at @ $900 they're getting really nice..


budget , or expectations flexible?
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