We've started carrying ROXYCLE (ロキシクル) products.
They're a lightweight parts brand, but what sets them apart is that their components aren't just light—they're thoughtfully designed with careful attention to detail.
What arrived today is called the "Expander"—a headset component that combines a column anchor and top cap into a single part.
It has a simple construction made from five components.
From left in the image: cap bolt, top cap, upper washer with bolt, split expander tube, and lower washer.
The top cap bolt is remarkably short because
they've only provided as much thread length as necessary for the adjustment range during assembly.
At a measured weight of 1.3g, you can really see the weight-saving effort.
The carbon top cap isn't just thin—it has a step designed to prevent it from shifting relative to the spacer or stem.
Measured weight is 3.0g.
Both the upper and lower washers have been machined to what seems like an extreme degree.
It's hard to tell from the side view, so I'll show detailed photos later.
Measured weights are 4.4g for the upper and 2.6g for the lower.
The most distinctive feature of this component is that the split expander tube is made of carbon fiber.
The measured weight is 2.3g, which is very light, but since this part needs to grip firmly to be effective, I initially thought "Can carbon really handle this?"
But surprisingly, it holds perfectly.
It depends on the bore diameter and roundness of the steerer tube, but once those specs align, it works without any issues.
The large-diameter bolt integrated with the upper washer is exceptionally short for weight reduction purposes.
When disassembled, the first thread engagement on the bolt is right at the limit, making reassembly a bit tricky.
View from above
View from below
The machining is seriously impressive.
The sum of individual component weights totals 13.6g, but when assembled, it comes to 13.7g.
It seems the fractional tenths that were rounded down across the five components added up to exceed 0.1g.
In whiskey production, the weight lost during aging in the barrel is poetically called "the angel's share," but this is more like "the devil's greasy fingerprints."
When building extremely light wheels, this kind of rounding can actually start to matter with nipples and other components.
They're a lightweight parts brand, but what sets them apart is that their components aren't just light—they're thoughtfully designed with careful attention to detail.
What arrived today is called the "Expander"—a headset component that combines a column anchor and top cap into a single part.
It has a simple construction made from five components.
From left in the image: cap bolt, top cap, upper washer with bolt, split expander tube, and lower washer.
The top cap bolt is remarkably short because
they've only provided as much thread length as necessary for the adjustment range during assembly.
At a measured weight of 1.3g, you can really see the weight-saving effort.
The carbon top cap isn't just thin—it has a step designed to prevent it from shifting relative to the spacer or stem.
Measured weight is 3.0g.
Both the upper and lower washers have been machined to what seems like an extreme degree.
It's hard to tell from the side view, so I'll show detailed photos later.
Measured weights are 4.4g for the upper and 2.6g for the lower.
The most distinctive feature of this component is that the split expander tube is made of carbon fiber.
The measured weight is 2.3g, which is very light, but since this part needs to grip firmly to be effective, I initially thought "Can carbon really handle this?"
But surprisingly, it holds perfectly.
It depends on the bore diameter and roundness of the steerer tube, but once those specs align, it works without any issues.
The large-diameter bolt integrated with the upper washer is exceptionally short for weight reduction purposes.
When disassembled, the first thread engagement on the bolt is right at the limit, making reassembly a bit tricky.
View from above
View from below
The machining is seriously impressive.
The sum of individual component weights totals 13.6g, but when assembled, it comes to 13.7g.
It seems the fractional tenths that were rounded down across the five components added up to exceed 0.1g.
In whiskey production, the weight lost during aging in the barrel is poetically called "the angel's share," but this is more like "the devil's greasy fingerprints."
When building extremely light wheels, this kind of rounding can actually start to matter with nipples and other components.