I see the Cam threw me under the bus with my tepid endorsement that I provided late last night after skimming through this video. I believe my words were “nice graphics and it seems mostly right. He got some stuff wrong about single pivots though.”
First, the good. I don’t watch many/any videos like this on the Internet, so I’m not sure if anybody else is doing things like this, but I really liked his animations that demonstrate the graphical method for anti-squat/anti-rise. I’ve never seen it shown like that and I really appreciate watching how those things change as the bike moves through travel. It tends to be a lot of lines pointing at shit, but it’s kind of cool.
I haven’t done an in depth analysis of this bike, but his conclusions that he draws on anti-rise, anti-squat and leverage ratio seem to be mostly right. There are a couple of really big howevers, though:
First, I tend to be really suspicious of anybody making really binary claims from these analyses. There’s no perfect anti-squat number. We all ride differently. We all have different preferences. Shit, even if you take these numbers as gospel, we all have a different center of gravity. I have a real problem any time anybody makes claims about having the perfect anti-squat numbers. Same goes for anti-rise.
Next, there were a couple of incorrect conclusions drawn about single pivot bikes. The big one for me was stating that a single pivot bike has a flat leverage curve. This is not necessarily true, and I think this is a mis-interpretation. Yes, single pivot bikes tend to have fairly _straight_ leverage curves, but not necessarily _flat_. What's the difference? Straight means that your leverage ratio has a steady rate of change. Flat means that it remains constant.
Have a look at the curves for these 3 single pivot Oranges, for some examples:
Orange 5 - Straight but falling - [http://linkagedesign.blogspot.com/2016/08/orange-five-275-207.html](http://linkagedesign.blogspot.com/2016/08/orange-five-275-207.html)
Orange Alpine - Straight and flat - [http://linkagedesign.blogspot.com/2016/08/orange-alpine-6-275-2017.html](http://linkagedesign.blogspot.com/2016/08/orange-alpine-6-275-2017.html)
Orange 324 - Straight and rising - [http://linkagedesign.blogspot.com/2018/04/orange-324-rs-275-2018.html](http://linkagedesign.blogspot.com/2018/04/orange-324-rs-275-2018.html)
Straight =/= flat
Beyond that, there are some differences in the analysis done here compared to the Spanish Linkage Blog.
[http://linkagedesign.blogspot.com/2019/09/yeti-sb-150-29-2019.html](http://linkagedesign.blogspot.com/2019/09/yeti-sb-150-29-2019.html)
This video is much prettier, but who is right? This is the second time I've cut and pasted this in to something today:
¯\\_(ツ)_/¯
Feb. 28, 2020, 5:52 p.m. - Dave Tolnai
I see the Cam threw me under the bus with my tepid endorsement that I provided late last night after skimming through this video. I believe my words were “nice graphics and it seems mostly right. He got some stuff wrong about single pivots though.” First, the good. I don’t watch many/any videos like this on the Internet, so I’m not sure if anybody else is doing things like this, but I really liked his animations that demonstrate the graphical method for anti-squat/anti-rise. I’ve never seen it shown like that and I really appreciate watching how those things change as the bike moves through travel. It tends to be a lot of lines pointing at shit, but it’s kind of cool. I haven’t done an in depth analysis of this bike, but his conclusions that he draws on anti-rise, anti-squat and leverage ratio seem to be mostly right. There are a couple of really big howevers, though: First, I tend to be really suspicious of anybody making really binary claims from these analyses. There’s no perfect anti-squat number. We all ride differently. We all have different preferences. Shit, even if you take these numbers as gospel, we all have a different center of gravity. I have a real problem any time anybody makes claims about having the perfect anti-squat numbers. Same goes for anti-rise. Next, there were a couple of incorrect conclusions drawn about single pivot bikes. The big one for me was stating that a single pivot bike has a flat leverage curve. This is not necessarily true, and I think this is a mis-interpretation. Yes, single pivot bikes tend to have fairly _straight_ leverage curves, but not necessarily _flat_. What's the difference? Straight means that your leverage ratio has a steady rate of change. Flat means that it remains constant. Have a look at the curves for these 3 single pivot Oranges, for some examples: Orange 5 - Straight but falling - [http://linkagedesign.blogspot.com/2016/08/orange-five-275-207.html](http://linkagedesign.blogspot.com/2016/08/orange-five-275-207.html) Orange Alpine - Straight and flat - [http://linkagedesign.blogspot.com/2016/08/orange-alpine-6-275-2017.html](http://linkagedesign.blogspot.com/2016/08/orange-alpine-6-275-2017.html) Orange 324 - Straight and rising - [http://linkagedesign.blogspot.com/2018/04/orange-324-rs-275-2018.html](http://linkagedesign.blogspot.com/2018/04/orange-324-rs-275-2018.html) Straight =/= flat Beyond that, there are some differences in the analysis done here compared to the Spanish Linkage Blog. [http://linkagedesign.blogspot.com/2019/09/yeti-sb-150-29-2019.html](http://linkagedesign.blogspot.com/2019/09/yeti-sb-150-29-2019.html) This video is much prettier, but who is right? This is the second time I've cut and pasted this in to something today: ¯\\_(ツ)_/¯