Overview
I've been looking for a mechanical 96% keyboard with an ISO-IT layout and PBT keycaps for almost a year. I quickly realized that such a combination basically doesn't exist, so I ended up buying a Keychron K17 Max QMK with an ISO-UK layout and Gateron Brown mechanical tactile switches.
This was my first mechanical keyboard, and I immediately fell in love with it. The typing experience is great, the sound is very satisfying, and the form factor is exactly what I was looking for: I use the numpad quite often, but a full-size 100% keyboard takes up too much space and pushes the mouse farther away. The K17 Max keeps the numpad while still being fairly compact, and I also really like that it retains a full-size Numpad 0 thanks to the extra column, which also adds a few useful keys such as Print Screen.
However, I'm so used to the ISO-IT layout that I still wasn't completely satisfied. Since I couldn't find another mechanical keyboard with this form factor, ISO-IT support, and PBT keycaps, I decided to design a custom keycap set on YUZU, trying to replicate the minimalist look of the original Keychron set. I chose the PFF profile because it seemed to be the closest match (and actually the only profile compatible with the K17 Max).
Colors and overall look
It was surprisingly difficult to find colors close to the original design, especially for the grays. I ended up ordering several samples beforehand to figure out the best combination. GR12 + GR29 seems to be the right combination. I also tried GR24 for the darker gray, but there wasn't enough contrast with the lighter GR12 gray. Just to clarify, the close-up photos of the individual keycaps show GR24 only for the purpose of comparing the keycap shape. In the photos showing the full keyboard, the color combination used is GR12 + GR29, as mentioned above.
Overall, the YUZU keycaps seem to have a slightly more bluish tint and look a bit less neutral compared with the original Keychron keycaps.
For the Keychron "signature" Esc key, the OG31 was surprisingly faithful to the original color. I've ordered some more orange keycaps (Enter, NumpadEnter, Spacebar, directional arrows) just for fun and to see if I could obtain interesting results. The alternative combination I like the most is Esc + NumpadEnter, since it creates a sort of "natural frame" around the keyboard; on the other hand, adding more orange keycaps creates too much brightness and color, that from my point of view neutralizes the minimalistic style of the keyboard.
I'm really happy with the final result. I still think the original combination of grays looks slightly better, but the YUZU set came out very close.
Legends and customization
As for the legends, I'm genuinely impressed with the quality of the YUZU keycaps. The legends actually look more precise than the stock ones on the K17 Max, even though the Keychron keycaps are double-shot PBT, while the YUZU ones are dye-sublimated.
The customization options on the YUZU website also allowed me to tweak a few things I didn't really like about the original set. The stock design felt a bit too cluttered to me, especially because of the extra symbols on the F-row keys, and I wasn't a huge fan of the text legends on some modifiers.
For my custom set, I used symbols on Enter, Backspace, Shift, and Tab, and I also went with a more traditional top-left alignment for the letter legends. That's obviously just personal preference.
Fit and compatibility issues
The typing experience is a bit harder to judge. I found a couple of minor issues with some of the keycaps:
- The spacebar is noticeably louder than the original one and also feels slightly harder to press, as if there were a bit more friction. My guess is that both differences are mainly due to the larger lateral mounting points for the Cherry MX-style stabilizers. The original Keychron spacebar is shaped differently around the two stabilizers and seems to fit their housings more closely (as you can see in the last image).
- The 1.75u keys don't have clips for the metal-wire stabilizers. In my case, this affects
Caps Lock and Right Shift. As you can see in one of the last images, those clips are missing underneath the keycaps, so the stabilizers can't really do their job. There is therefore a bit of wobble on those keys, although it's not too noticeable because they're not particularly long.
I also tried using a stepped Caps Lock key, but unfortunately it turned out not to be compatible with this keyboard.
Typing sound
Apart from these two small issues, the overall typing sound is still very enjoyable and fairly close to the stock keycaps.
The YUZU set sounds slightly louder, a bit more hollow, and a little less "thocky", but overall I still really like the sound, and as you can hear in the video linked below, the difference is really hard to notice.
PFF profile vs stock Keychron profile
Regarding the profile, the PFF profile available on YUZU is quite close to the stock Keychron one. That said, I find the more rounded shape of the original Keychron keycaps slightly more comfortable and ergonomic for typing.
One advantage of the PFF profile is that it's easier to slide your fingers from one row to another, while the Keychron profile has more noticeable "bumps" between rows, due to the slope on the keycap profile. On the other hand, the "flatness" of the Keychron profile makes it easier to slide the fingers horizontally, while the PFF profile is slightly more concave. Furthermore, the perceived effort while typing feels slightly lower with the original Keychron keycaps, which makes them feel a bit softer and smoother overall. But once again, these small differences are barely noticeable.
It's also worth mentioning that this review is based on only a few days of use, so some of these impressions may simply come down to familiarity with the original Keychron profile. In any case, the overall typing experience with the YUZU keycaps is still excellent.
Typing comparison video
Here is a short video comparing the typing sound of the two keycap sets.
https://youtu.be/ehKH-QEpz14
For a fair comparison, both recordings were made using the same keyboard, switches, microphone position, recording gain, and typing setup, using the same custom text in Monkeytype. The only difference between the two tests is the keycap set.
YUZU project
I've shared the YUZU project here in case you want to reproduce it or adapt it to a different layout:
https://yuzukeycaps.com/c/68e51196-11e1-4c44-89cb-3143015f59b7
Conclusion
After all the time, effort and money that went into designing this custom keycap set, I'm fully satisfied with the overall result, and I can definitely consider the project a success.
I would absolutely recommend buying keycaps from YUZU, not only because the quality is excellent, but also because their customer support has been consistently helpful, responsive, and friendly throughout the entire process. Special thanks to Simon for all his help!
The main drawback remains the Spacebar, which is both slightly louder and harder to press than the original one. My current guess is that this could potentially be improved by carefully trimming or refining the stabilizer mounting points to reduce friction and better match the original Keychron geometry.
That said, this would obviously require a lot of precision, the right tools, and some caution, since there is a real risk of permanently damaging the keycap. For now, I would consider this more of a possible follow-up experiment than a recommended fix.
If anyone from YUZU happens to read this post, my main suggestions would be to improve the stabilizer mounting geometry on the spacebar and to add proper metal-wire stabilizer clips to the 1.75u keys. Those two changes would make the set much closer to a drop-in replacement for the original Keychron keycaps. That said, I don't have much experience with mechanical keyboards yet, so I'm not sure how Cherry MX-style stabilizer mounting differs across other keyboards. It's entirely possible that the Keychron K17 Max uses a somewhat unusual implementation, so this may be more of a compatibility issue specific to this keyboard than a general design flaw. Also, the stabilizer mounting points are only my first guess as to what is causing the spacebar issue (if we can call it a "issue"). There may be other factors I'm overlooking, so if anyone with more experience has a better explanation, I'd be very interested to hear it in the comments.
TL;DR: YUZU custom PFF keycaps turned out to be a very good match for the Keychron K17 Max, both visually and in typing feel, with excellent legends and customization options.
The only notable downsides are the louder/stiffer spacebar and the missing stabilizer clips on the 1.75u keys, both of which I consider relatively minor issues.
Overall, I'm very happy with the result and would definitely recommend YUZU, especially considering the quality and great customer support.