50Cは本当に速い？Panaracer GRAVELKING ZXをROVEとRENEGADEに装着してみた

Is 50C really fast? I put Panaracer GRAVELKING ZX on my ROVE and RENEGADE

May 6, 2026

Gravel is entering an era where "fatter means faster." We tried installing GRAVELKING ZX on ROVE and RENEGADE.

From the standard gravel tire sizes of 38-40C, we are now seeing a shift to 45-50C. Especially in racing, the idea that "fatter is faster in real-world riding" is gaining traction.

This time, we tested Panaracer's new "GRAVELKING ZX." It's a "fat and fast tire" that combines the easy rolling of a slick center with the reassuring stability unique to 50C-class tires.

We actually installed it on our popular gravel bikes, the KONA ROVE ST and JAMIS RENEGADE S3, and checked the clearance and compatibility. We delve into the gravel tire situation in the 50C era, beyond just speed.

Panaracer GRAVELKING ZX

Panaracer GRAVELKING ZX Gravel Tire 700x45C 50C

[Manufacturer's Suggested Retail Price] ¥6930
[Colors (2 total)] Black, Brown
[Sizes] 700x45c, 700x50c

▼Check stock for colors and sizes here

The concept of "fat and fast tires" spreading from gravel racing

50C is now "fast and stable," not "heavy"

Gravel tires have widened significantly in recent years. What was once the standard 38-40C has now shifted to the 45-50C class.

Beyond road-hugging and traction performance due to low pressure, the focus is now on "real-world speed" due to reduced slip loss.

The GRAVELKING ZX is Panaracer's new tire that reflects these latest trends in gravel racing.

Slick center × side knobs. ZX's unique race-oriented design

Combining light rolling on paved roads with confidence on gravel

The ZX features a combination of a completely slick center and naturally connecting side knobs.

This exquisite tread pattern allows for nimble rolling on pavement while maintaining excellent grip when transitioning to dirt.

Its speedy appearance, more like an extension of a road tire than a "chunky gravel tire," is also appealing.

We installed 50C on the ROVE ST and RENEGADE S3.

KONA ROVE ST

JAMIS RENEGADE S3

How 50C "fits" varies by bike

On the KONA ROVE ST, the 50C fit surprisingly naturally. In fact, this width seemed to suit the character of the current ROVE even better.

On the other hand, the JAMIS RENEGADE S3 was quite tight. The clearance was minimal, but that "snug fit" also has its own unique appeal.

It's interesting how even with the same 50C, the individual character of each bike clearly emerges. If your bike has ample clearance, it's definitely worth trying.

The evolution of gravel tires is changing the perception of "width."

While "thinner is faster" was once the norm for gravel tires, the superiority of wider tires is gradually being proven in actual racing scenarios.

The GRAVELKING ZX is a tire that reflects this latest trend. Despite its 50C size, it rolls smoothly on paved roads and provides a strong sense of security on gravel.

This tire is not only for race-oriented riders but also for those who want to enjoy gravel more comfortably and freely. If you have ample clearance, definitely give it a try.

▼Check stock for colors and sizes here

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