ฝัง
- เผยแพร่เมื่อ 4 ก.ค. 2024
- In this video, we sought to understand how tire inserts affect ride quality (if at all) while descending. Shout out to Nicky D who was kind enough to run laps all day with me.
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Chapters:
0:00 - Introduction
1:20 - Vibration Isolation Explanation
6:44 - A Note on Traction
8:32 - Instrumentation
9:17 - Track Preview
10:31 - Nicky's Feedback
13:12 - Quantitative Results
19:01 - Conclusion
This is the kind of analysis that I like to see when trying to isolate the marketing around a product, excellent content
Killer stuff dude!!!
Great work, but here are a few things you could improve for future videos, plus some questions about what was done in this video:
- If you're having someone test whatever component or setup, it's preferable to not have the tester know what they are testing. In this particular case, it's obvious that Nicky D is a good rider and will be able to tell the blatant difference of 5 psi in his tires, but regardless of this fact, it's important to not let the tester know if there are/what are the differences, to avoid his biases from affecting the feedback he provides.
- Why did you settle on a 5 psi difference from stock pressures? Nicky has optimized his tire pressure without inserts. Comparing against a optimized pressure with inserts would make more sense, because that's how one would usually ride.
- Inserts are commonly used as a system with the tyre. People will often switch to a softer casing when using an insert, and, conversely, switch to a stiffer casing when not using inserts. It's an idea for further analysis.
- Confident riding often translates to faster riding and trying to push the limit. I believe your analysis of the greater traction loss time and intensity with the LPC is correct, but you need to compare the duration of the runs to know if the differences in traction and vibrations were due to tyre setup or how fast Nicky was going.
I've been drawing some inspiration from you work for potential ideas for my master thesis, and really like what you're doing. Keep it up!
Love the point about softer casing w/ inserts…
hell yeah
You missed the low psi stock test
I was banging my rear wheel a ton and getting dents. SJ evo with 29 rear. Cush core helped reduce dings, but the weight and rotation gyroscope effect was a negative. Maybe i should have dropped more psi. Then I went to 27.5 rear without cushcore and maneuverability went way up. It feels lighter, which is obvious: no cush core, smaller wheel. I'm curious to try cush core with low pressure in the 27.5 wheel. I haven't had any wheel dings, but I'm also not riding the chunky rock mess that is riding in SLO.
Getting slower with inserts isn't from the weight and rotation gyroscope effect (primarily), it is mostly from the extra energy cost to deform the insert as the tire rolls along (rolling resistance). There are some inserts for road tires that don't touch the tire at all until you get a flat or really compress the heck out of the tire, and those don't have this penalty, but I don't know if any such setup exists for mountain bikes, and would have limited usefulness if they did I guess.