Mine don’t have these markings anywhere…
Started using the wheels January 28. Started using strava the week after. I live in southern Germany. It’s been below freezing but not much.
Wow. Less than two months and not much more than 200 KM. That’s early! Thanks for sharing.
That’s strange. That the first thing Iwonder asked for when I contacted them.
When did you order them?
That is actually a great idea, 3d printed reinforcement to bolster the wheels which don’t have a pulley.
Question: any wheels blowing cores with a pulley installed or just front wheels?
November 30…
Yeah, I know!
So I checked the cores again tonight. I’ve rode maybe 20 kilometers since last time I inspected the cores. The original wheel that started cracking was on the single drive wheel. After discovering the cracking I switched out the drive wheel to see if it occured on another wheel. Took the old wheel and placed it on my rear left side truck.
New wheel with pulley. Theres a slight fracture running from one side of the core to the other.
Old wheel on the left rear truck. It has chunks completely missing on both sides of the core…
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Wtf is a .heic file lol
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Lol idk. I’m trying to fix this.
The attempted successor to GIF, it failed though.
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I think Apple(iPhone) made that file format their primary image format to go to. Can store more Image data than a jpg but with smaller files. In terms of image format quality think jpg<heic<raw
Those pictures are shocking. The core seems to be made of a very brittle plastic that is inadequate for the loads and cracks and crumbles due to fatigue. The stress cracks have likely propegated much deeper than is visible at the surface.
And as you stated, this happened in less than 2 months with just over 200km. Cold weather could be a factor but its not a reason to assume these are safe in other conditions.
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Yikes!!! Me no touch!
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HEIC was intended to be the replacement for jpeg. It supports 10-bit color and is the default image container for Apple products ATM. It is akin to H.265 for video.
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How tight did you clamp the pulley bolts? Those artifacts on the edge of the core look like stress damage. I think these cores, combine with the cold + excessive stress is not a good combo. I honestly don’t think the ABEC core is a good candidate for bolt on pulleys, only pressfit.
Bolt tension was only snug. Nothing crazy at all. I thought about this when I fitted the pulley on the new wheel. I’ll try to take off the pulley tomorrow and document the current state.
People have been running bolt on abec pulleys for years. I don’t think I’ve ever seen cores fractured like that. At most people would forget to put bearing spacers in/forget to do proper maintenance and the bearings would seize get hot and melt themselves out of the core.
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I meant these wheels as in these clone abec cores. They have thinner spokes than original abec, and looks to be a material that is prone to weakening in cold conditions. I would rate them as trustworthy if handled with care kind of thing.
The combination of the tighter bearing tolerance than original abec (already added radial stress to the plastic) + additional compression forces and impact could do these over.
Ahh yeah I can’t even ever remember seeing something like this happening to regular chinesium wheels with the clone cores.