The Chain Damper isolates the rider from spikes in chain energy, reducing drivetrain feedback .
By bringing the chain under control the rider is more closely connected to subtle suspension action.
The Chain Damper is engineered to smooth out peak chain forces by capturing it within a precisely calculated angle of rotation.
Animation by the talented Theo Charrier-@mtbprogress
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This significantly reduces drivetrain feedback, creating a smooth, silent ride and chainless feel.
Designed for performance. Engineered to last.
Multiple x-ring seals for maximum resistance to water and dirt ingress
No specialist tools
required
Serviced in minutes
Low profile design for best chain guide compatibility
Elastomer controlled positive and negative stroke to capture the chain forces in both directions
Extremely stiff, long service life springs
7075 aluminium construction
Only 140g excl chainring, 230g with.
Proven by
Engineered to handle anything you throw at it, the Chain damper far exceeded the ISO 4210 static and fatigue tests. In fact, it maxed out the capabilities of the test machinery. Power hour loop or, interval training or racing full throttle between the tape, you can trust the Rimpact Chain Damper.
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Available in 30-36t chain ring sizes.
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11/12spd & T-Type compatible.
Click here to register you interest for an Ebike compatible model
A chain weighs around 260 grams on average and the top part of your chain, (the length between the chain ring and cassette) can move at 8 meters per second, completely uncontrolled. Clutch derailleurs offer some amount of control to the lower part of your chain but the top remains free to flail wildly.
Here at Rimpact, we think the significant effect of this uncontrolled chain energy plays a bigger part in unwanted ride characteristics than other sources of negative drivetrain feedback.
We've designed a device that can capture this energy momentarily, smoothing out the peak energy spike that usually translates to this significant drivetrain feedback. By controlling the chain's energy spikes, the Chain Damper creates a silent and calmed ride characteristic that lets the rider focus in on subtle suspension movements and the sound of tyres gripping the dirt. Ultimately a more confidence inspiring ride.
Frequently Asked Questions
How does the Chain Damper pair with a high/low engagement hub?
It works great with both! The Chain Damper works to reduce drivetrain feedback regardless of the points of engagement you have.
Does it work on a Hardtail too?
Yes, and arguably offers even more benefit due to the harshness of the solid rear end on Hardtails.
Are they ebike compatible?
Not just yet, but soon! First batch is only compatible with regular/acoustic bikes, subsequent batches will add new crank fitments and we intend to introduce Ebike specific models in the near future.
Is there a Raceface, Ethirteen, Hope (etc) fitment option?
Soon! See question above.
What Chainlines is it available in?
Initial batch is a Boost, T-type and DH compatible chainline. Super Boost and other chainlines may follow in future batches. Be sure to contact us to register your interest so we know there is an appetite for your set up.
I don't see an option to fit my crank?
First batch is available as a Shimano direct mount, 3-Bolt SRAM and 8-bolt SRAM T-type. Other types will follow, please register your interest so we know to make them!
Why isn't there a travel adjustment so I can customize the feel?
Put simply, this would break the device functionality. Reducing the rotation angle by 25% will half the effectiveness of the device's ability to smooth out chain forces. We've precisely calculated the required rotation angle and spring rate to ensure maximum performance.
Is it compatible with my Chain?
As long as the chain is an 11 or 12 speed mountain bike chain that is also compatible with Shimano and SRAM 11-12 speed options then it will work.
Does it reduce pedal efficiency or create a spongy feel?
No, once the springs are compressed moments after applying pressure to the pedals, the chain ring is engaged and there isn't any efficiency loss or noticeable spongy feel. You'll feel a soft top out on the travel of the ring when lightly engaging the crank but this serves to further isolate drivetrain forces and vibration.
Does it work with High Pivot Bikes and Idlers?
Yes. Idlers and HP bikes tend to have seat stays that sit super close to the chain undoing a lot of the advantages gained from reducing chain growth and shortening the amount of unsupported chain between the BB and the rear axle. If you watch high speed footage of these types of bikes you'll see plenty of chain slap and thus energy transfer into the frame and chain ring when riding rough terrain. The Chain Damper will still cut the majority of this feedback and noise from the drivetrain and produce a super smooth ride quality.
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