In the previous episode of
"WE DEVELOP A BIKE FRAME" we were at the EFBE lab, where we learned that our chain stays are unfortunately not durable enough yet. As life plays, when it gets hard, it gets pretty damn hard. And so for us, within the same week, we received a friendly email informing us that our design would infringe an existing patent.
Of course, the week was over, but instead of giving up, we just looked at the whole design again. Both of us had carried the idea that we could have been even bolder when designing the anti-squat. So we took this as a chance, remodeled the yoke and relocated the idler pulley. In this video, Giacomo takes you to his local trails to verify the more aggressive anti-squat setting. During the first ride, he can already prove that the bike potentially will become faster. Like Confucius said: "An inconvenience is an unrecognized opportunity."
Giacomo trying to verify the kinematic modifications via STRAVA
Let's explain you the changes:The Idler Pulley will be mounted onto the Main Pivot now. This adjustment will improve the kinematics massively and allow us to move on without patent issues, at least as far as we know.
The new position of the Idler Pulley maximizes Anti-Squat (Green Graph). Bikes with High Pivot Points naturally offer excellent support under pedaling without the downside of pedal kickback when using an idler pulley to reroute the chain. But we went a bit further and optimized the Anti Squat throughout the gears and travel to achieve what we believe is perfection. Plenty of support when climbing but no Pedal-Kickback in DH gears! Aha, the 4-Bar XYZ bike we use for comparison is the top model of a big bike brand from Switzerland, which we consider one of the best you can buy.
High Pivot Bikes don´t need as much Pedal-Kickback, so the Pedal-Kickback remains very low in comparison to traditional bikes. You can not recognize the Pedal-Kickback in Medium and DH Gears. Most important is what happens after the SAG Zone, and our Graph remains almost vertical from here. We achieve this through the dropping Anti-Squat curve. We did not want to throw to many graphics on you. But if you need to know it: 34/10 results in -2° Pedal Kick-Back, that means total freedom for your rear suspension. 34/50 results in 19° Pedal Kick-Back and 140% Anti-Squat in SAG Zone; this makes the Kavenz feel like an XC Bike.
What happens next?In real-time we are already welding the chainstays, and if all goes smoothly from here, we will knock the doors of EFBE again in a few weeks.
In case of success, we expect to be ready to accept first orders in early November and deliver the first frames in early spring 2020.
The frame builder Ingo welding the redesigned Chainstays
If the nerd talk is not yours, watch this:We also created a website where we gather all of the information about the bike frame and the project. If you are in the game for a faster bike ->
https://vhp16.kavenz.de/landing-page
This is just what you want to see from a small company developing a frame, not just a pretty CAD picture, some colourful T-Shirts and a crowd-fund before one has ever been made or had any testing done in the slightest.
Interesting that there was a patent on the idler - was it on the idler position alone?
Please...
www.pinkbike.com/photo/12167481
I’ll keep an eye out thanks guys that thing is rad
If it's trendy enough it would be still sold out of Czech Republic empire-cycles.cz
No 29er option tho, even the MX6...
Lab testing in one thing but I would expect a bike that has also been tested in the gnarliest trails in the world for a few months before coming to sale. I know in 2019 some decide to rush things out and consider early customers to be really beta testers but I am not sure it is the best way to promote a new brand.
Patent issues avoided, worked on the rallon...
How can you do that when lots of bikes before you have done it?
Also try heat treating finished parts as you will get better strength result?
Or just blame the welder?
It will have been heat treated, they won’t be age hardening an alloy bike frame, expect the obvious is covered.
All I read is that they are saying they tested the frame, it failed, so they have re-designed / welded new chainstays to continue testing, they are being open as its part of the development of the frame which if you see the title of the article is the whole point!
Your point about Specialized, worn bearings and broken chainstays makes no sense in any context at all.
Commençal supreme SX
craftworks enr
forbidden druid
...
And no pulley but it count imho: cavalerie anakin & blackbird
ARBR
Dark Owl
I Track
There is a lot going on in this direction.
After owning a Canfield Jedi, I know why some will go that route.