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Road Bike Frames, Wheels & Components / Re: Onirii One
« on: October 28, 2023, 01:41:49 AM »
I can start another thread about the Bigrock road frame, but curious to know if you had run across thoughts out there comparing the two.
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This is the frame
https://www.lightcarbon.com/new-integrated-road-disc-brake-frame_p136.html
Woops. Hit send too quick.
If anyone can figure out who makes it (I doubt it's a fully custom frame), the Fezzari Veyo might fit the bill. At retail, it's probably too expensive (though not bad as a full bike), but if you can find the mfr, it looks close!
https://fezzari.com/products/veyo
Carbonda CFR 1056, i read it can handle a bit than more than the 32 claimed.
On this video () a guy runs with schwalbe g-one, probably the 35mm version.
I like rhinowalk saddlebags, risk titanium bolts, towild lights.
I dislike anything from og-evkin.
Interesting take on the pulley wheels; I'm using a pair of cheap alloy ones with ceramic bearings on both my mountain bikes (one SRAM GX and one Microshift Advent X derailleur). No problems with either of them and they look great. Have been using them for a few months now. I'd rate them as decent value but mostly an aesthetic upgrade.
So basically, based on my not-so-good understanding of the issue, compression plug up until upper headset bearing = better right? And failure of headset happens because of short compression plug which results to headset preload and eventual destruction of the steerer?
I can recommend the 70mm long version from Deda Elementi. Not available in the US though, IIRC.
Also, it’s not only about having support against the clamping force of the stem. Most shorter expanders provide this as well as the stem obviously sits on top of the steerer and has a stack height of max 40mm. It’s also about providing stability against the bending forces that occur when going over bumps or pulling on the bars. Ideally, if your frame is the correct size and you’re not using a humongous tower of spacers underneath the stem, the expander will protrude all the way or almost until the upper headset bearing. This provides maximum stability.
This for instance is also why Specialized provided super long expanders in their Tarmac SL7 recall. The steerer movement under load meant that the compression ring of the upper headset ate into the carbon steerer until it snapped. The new expander limits this. In my opinion this issue is not isolated to the Tarmac SL7. It’s a problem of internal cable routing designs per se.
Short answer: It kind of can be done, but you'd need rather special road cranks for it. The issue is not chainring size; it's cranks being generally weird.
At the absolute minimum chainline position, there is space for a 46 or 47 t chainring no problem. The issue is not chainring size, but that there is virtually zero lateral space between the ring and the stay. Meaning, you'd need a crank with the spider offset to the right side of the chainring. That may sound very trivial from an engineering standpoint ... because it totally is. But being bound by what you can buy off the shelf, you're now basically looking at frankensteining together a very custom crankset from modular crank parts. Or having stuff machined. Or go very wide (which nobody wants, because it sucks ass, in a bad way).