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roil

Joined March 2, 2021

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Commented on Pushing Comfort Zones with Miranda Miller - 1 week, 2 days ago

Rome wasn't built in a day. So ...
Commented on Pitching Forward: The Impact of Steep Seat Tubes - 2 weeks, 3 days ago

100% to all the above
Commented on Pitching Forward: The Impact of Steep Seat Tubes - 2 weeks, 3 days ago

Great stuff but I have some points on ...
Commented on Pitching Forward: The Impact of Steep Seat Tubes - 2 weeks, 4 days ago

The milk crate pics are great! Apologies if ...
Commented on Pitching Forward: The Impact of Steep Seat Tubes - 2 weeks, 4 days ago

Road bike STA is optimized for riding on ...

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Pushing Comfort Zones with Miranda Miller - April 7, 2021, 11:32 a.m.

Rome wasn't built in a day. So cool of Miranda to share her process.

Pitching Forward: The Impact of Steep Seat Tubes - March 30, 2021, 2 p.m.

100% to all the above

Pitching Forward: The Impact of Steep Seat Tubes - March 30, 2021, 10:26 a.m.

Great stuff but I have some points on 2, 3 & 5.

The front center needs to be balanced with the rear center and the reach numbers play into this as well. Too many manufacturers design bikes with the same rear center (chainstay) and just increase the front center leading to an unbalanced bike.

When standing on an MTB, we are typically in descent - on a decline as opposed to level ground. I don't see how the ability to lift one's hands off the bars without falling forward is applicable for this use case. That being said, rarely does anyone bring up the importance of stack height with respect to reach and its impact on body position and weight distribution.

Every geometry is a compromise but would you rather have a setup that is well suited for the most challenging parts of the trail or the easiest?

Pitching Forward: The Impact of Steep Seat Tubes - March 29, 2021, 10:59 a.m.

The milk crate pics are great! Apologies if they were there all the time, and you're just humoring me.

Regarding tri bikes and a steep seat tube being better, I think the kinetic chain reasoning makes sense and taking that idea even further, the position of the hips relative to the bottom bracket or centerline of the cranks needs further examination.

The sprint position on a road bike or standing position when climbing any bike has your hips directly over the bottom bracket. Granted, you are no longer seated so there are other factors at play. However, this vertical hip and bb alignment also allows gravity to work in our favor, sitting or standing.

Our bodies are designed for walking and running so it would make sense that our muscles are strongest at or near this vertical position as this is when the body's muscles experience the largest loads (initial ground contact).

Bottom line, MTBs geo needs to be completely reevaluated for its actual use case (seated climb and standing descent) as opposed to slowly tweaking flat road bike geo.

Pitching Forward: The Impact of Steep Seat Tubes - March 29, 2021, 8:29 a.m.

Road bike STA is optimized for riding on flat land. MTB STA should be optimized for climbing (and have a steeper STA).

All of the seat position photos above only show the rider on flat land. Seating position should factor in uphill grade and the argument could be made that attack position should factor in downhill grade.

I would rather prioritize performance and comfort when climbing where effort is higher vs flat land. There is a great youtube video on this. Just turn on the captions unless you speak italian.

https://www.youtube.com/watch?v=j-r2k7527vA&t=9s

Foxzocchi Z36 Coil GRIP2 VVC - March 2, 2021, 9:25 a.m.

Same boat as you. I'm leaning towards getting a Diaz Runt + their damper tuning kit.

https://diazsuspensiondesign.com/runt

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