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Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Thu Apr 17, 2025 8:34 am
by weeksy
https://www.rimpactmtb.com/tmd?srsltid= ... UYBwMeio3T
I've ordered one of these for the boys race bike..
As you can see, it's a bouncy uppy/downy thing... Which in theory bounces at a particular rate/speed to help with suspension.
You'll have to read a bit more in the link really.
My mate at RSR Bikeworks has been working with World Cup teams and found it really good/useful, so thought we'd give it a whirl.
Sadly there's no in UK for 4-5 weeks, but we can wait
Re: Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Thu Apr 17, 2025 9:24 am
by MingtheMerciless
Re: Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Thu Apr 17, 2025 9:34 am
by weeksy
Well from what i've seen the theory is 1s per minute. Which isn't a lot admittedly, but this weekend gone that could have pushed him from 16th to 9th in Nationals. Fort William it could be 4s per run... which again is massive in his world
Re: Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Thu Apr 17, 2025 10:21 am
by MingtheMerciless
Hmmm, that would put me in KOM territory for a couple of segments....
Keep me updated.
Re: Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Thu Apr 17, 2025 2:01 pm
by Mr Moofo
weeksy wrote: Thu Apr 17, 2025 8:34 am
https://www.rimpactmtb.com/tmd?srsltid= ... UYBwMeio3T
I've ordered one of these for the boys race bike..
As you can see, it's a bouncy uppy/downy thing... Which in theory bounces at a particular rate/speed to help with suspension.
You'll have to read a bit more in the link really.
My mate at RSR Bikeworks has been working with World Cup teams and found it really good/useful, so thought we'd give it a whirl.
Sadly there's no in UK for 4-5 weeks, but we can wait
Bring back flex stems and brake boosters
Re: Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Thu Apr 17, 2025 2:34 pm
by Mr. Dazzle
Not entirely snake oil, idea comes from F1. Well it actually comes from an academic at Cambridge Uni, it was merely
applied first in F1.
https://en.wikipedia.org/wiki/Inerter_( ... _networks)
EDIT: Just like is says in that website, actually
Re: Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Thu Apr 17, 2025 3:53 pm
by Mr Moofo
Whuch is fine. But I am not sure how those small gains really make a huge difference on a downhill MTB
Re: Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Thu Apr 17, 2025 4:10 pm
by Horse
Mr Moofo wrote: Thu Apr 17, 2025 3:53 pm
Whuch is fine. But I am not sure how those small gains really make a huge difference on a downhill MTB
The "aggregation of marginal gains" is a concept championed by Sir Dave Brailsford, who led the British cycling team to dominance, including winning 16 gold medals in the 2008 and 2012 Olympics. This theory focuses on making small, incremental improvements in many areas, believing that even 1% improvements in various aspects can collectively lead to significant overall performance gains.
Re: Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Thu Apr 17, 2025 4:31 pm
by Count Steer
Horse wrote: Thu Apr 17, 2025 4:10 pm
Mr Moofo wrote: Thu Apr 17, 2025 3:53 pm
Whuch is fine. But I am not sure how those small gains really make a huge difference on a downhill MTB
The "aggregation of marginal gains" is a concept championed by Sir Dave Brailsford, who led the British cycling team to dominance, including winning 16 gold medals in the 2008 and 2012 Olympics. This theory focuses on making small, incremental improvements in many areas, believing that even 1% improvements in various aspects can collectively lead to significant overall performance gains.
S'just a version of 'kaizen' innit?
(Which was actually initiated in post-war Japan by....America).
Re: Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Thu Apr 17, 2025 4:55 pm
by weeksy
Mr Moofo wrote: Thu Apr 17, 2025 3:53 pm
Whuch is fine. But I am not sure how those small gains really make a huge difference on a downhill MTB
They don't.... they make 1s per minute, which is TINY but also HUGE at the same time
Re: Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Thu Apr 17, 2025 4:58 pm
by Horse
Count Steer wrote: Thu Apr 17, 2025 4:31 pm
S'just a version of 'kaizen' innit?
(Which was actually initiated in post-war Japan by....America).
Co. I worked at had some odd, similar-sounding system for stock control.
Visitors who knew all about best-practice production methods were usually confused, they didn't know about it!
Someone made it up.
But then, products were sometimes named after Magic Roundabout characters ...
Re: Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Thu Apr 17, 2025 5:13 pm
by Count Steer
Horse wrote: Thu Apr 17, 2025 4:58 pm
Count Steer wrote: Thu Apr 17, 2025 4:31 pm
S'just a version of 'kaizen' innit?
(Which was actually initiated in post-war Japan by....America).
Co. I worked at had some odd, similar-sounding system for stock control.
Visitors who knew all about best-practice production methods were usually confused, they didn't know about it!
Someone made it up.
But then, products were sometimes named after Magic Roundabout characters ...
Kaizen is one of those things that seem blindingly obvious - with hindsight.
If you fix all the small things, the big thing runs better. So, something like the Toyota Production System didn't worry about whether making cars was the right thing to do, just how to do it 'better' where 'better' can be cheaper, faster, more profitably, higher 'quality' etc. In the Japanese case it was 'all the above'.
Re: Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Thu Apr 17, 2025 8:11 pm
by Taff
This is the vibration absorber fitted to a lynx helicopter rotor head, iirc they weigh about 50kg and absorbs vibration in the same sort of way being a sprung weight, but, the big difference is that the rotor head turns at a constant rpm.
Re: Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Thu Apr 17, 2025 9:14 pm
by Mr Moofo
Count Steer wrote: Thu Apr 17, 2025 5:13 pm
Horse wrote: Thu Apr 17, 2025 4:58 pm
Count Steer wrote: Thu Apr 17, 2025 4:31 pm
S'just a version of 'kaizen' innit?
(Which was actually initiated in post-war Japan by....America).
Co. I worked at had some odd, similar-sounding system for stock control.
Visitors who knew all about best-practice production methods were usually confused, they didn't know about it!
Someone made it up.
But then, products were sometimes named after Magic Roundabout characters ...
Kaizen is one of those things that seem blindingly obvious - with hindsight.
If you fix all the small things, the big thing runs better. So, something like the Toyota Production System didn't worry about whether making cars was the right thing to do, just how to do it 'better' where 'better' can be cheaper, faster, more profitably, higher 'quality' etc. In the Japanese case it was 'all the above'.
Oddly, I introduced kaizan into the Japanese company I worked for ...
Re: Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Thu Apr 17, 2025 9:47 pm
by Mr Moofo
Horse wrote: Thu Apr 17, 2025 4:10 pm
Mr Moofo wrote: Thu Apr 17, 2025 3:53 pm
Whuch is fine. But I am not sure how those small gains really make a huge difference on a downhill MTB
The "aggregation of marginal gains" is a concept championed by Sir Dave Brailsford, who led the British cycling team to dominance, including winning 16 gold medals in the 2008 and 2012 Olympics. This theory focuses on making small, incremental improvements in many areas, believing that even 1% improvements in various aspects can collectively lead to significant overall performance gains.
I am sure the little packages that were being slipped to various riders had nothing to do with it!
Or no more than any other cycling team!
Re: Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Fri Apr 18, 2025 9:46 am
by Mr. Dazzle
Horse wrote: Thu Apr 17, 2025 4:10 pm
The "aggregation of marginal gains" is a concept championed by Sir Dave Brailsford, who led the British cycling team to dominance, including winning 16 gold medals in the 2008 and 2012 Olympics.
British Cylcing love to parrot this, like they came up with the idea
I had loads of BC tech guys try to explain it to me, like we hadn't been using that thinking in F1 and the like for 3 decades prior.
BTW 1s gain per minute would be LOADS in F1. Almost unheard of to get that sort of gain from one change.
Re: Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Fri Apr 18, 2025 10:19 am
by Count Steer
Mr. Dazzle wrote: Fri Apr 18, 2025 9:46 am
Horse wrote: Thu Apr 17, 2025 4:10 pm
The "aggregation of marginal gains" is a concept championed by Sir Dave Brailsford, who led the British cycling team to dominance, including winning 16 gold medals in the 2008 and 2012 Olympics.
British Cylcing love to parrot this, like they came up with the idea
I had loads of BC tech guys try to explain it to me, like we hadn't been using that thinking in F1 and the like for 3 decades prior.
BTW 1s gain per minute would be LOADS in F1. Almost unheard of to get that sort of gain from one change.
Not to mention that some marginal gains in one respect can have negative impacts in another. eg that mass damper comes with a weight penalty. Possibly not a biggie in DH but the mass is carried quite high.
It's often a case of change one thing then chase out the negative impacts on other bits of the whole.
Re: Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Sat Apr 19, 2025 9:01 am
by Taff
Re: Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Thu May 22, 2025 3:23 pm
by weeksy
IMG-20250522-WA0003 by
Steve Weeks, on Flickr
And here it is... Ready to be installed and then suspension setup using Data Acquisition this weekend. I would call it Telemetry but i'm sure someone would tell me it's not as that has to be read on the fly otherwise it's not telemetry
The data is taken after each run when back at the bottom and analysed and then changes made
Re: Rimpact Tuned Mass Damper - MTB Nerds time
Posted: Thu May 22, 2025 6:00 pm
by millemille
weeksy wrote: Thu May 22, 2025 3:23 pm
IMG-20250522-WA0003 by
Steve Weeks, on Flickr
And here it is... Ready to be installed and then suspension setup using Data Acquisition this weekend. I would call it Telemetry but i'm sure someone would tell me it's not as that has to be read on the fly otherwise it's not telemetry
The data is taken after each run when back at the bottom and analysed and then changes made
Good boy, Steve, good boy
