Settings for Direto XR on Rouvy

[GoustiFruit]

Hi,

Rouvy has “native” virtual shifting, but when I tried, the resistance really didn't match the reality (on the flat, I'm spinning 100rpm to reach maybe 150W with the highest gear).
So, I installed QZ, and I'm now able to push watts even on big descents (if needed, by using gears 24, 25, …).

BUT: even if I select Bike settings > Wahoo (that's the only option available, is it supposed to work with a Direto XR ?) with, for ex., the "Time Trial" gear profile, the gears still don't match reality. On a 1-2% slope, I may need to switch to 36/28, and it's still too hard, I would need to go down to negative gears on the app.

So, anyone having a Direto XR on Rouvy: what settings did you change to have something somewhat realistic ?

Thanks for your help.

PS: I also noticed that there is a 3s time lap when changing gears before the resistance finally changes. Is it expected, or is there a setting that I missed ?

[dosubot[bot]]

Hi @GoustiFruit! I'm Dosu and I’m helping the qdomyos-zwift team.

For Direto XR on Rouvy via QZ, realistic resistance and gear feel usually require manual tuning. The Wahoo bike setting is the only option in QZ for virtual shifting, but it's not tailored for Direto XR—so you’ll need to adjust the gear gain and resistance settings to get closer to reality. Start by increasing the "gears gain" value in QZ (Bike Options > Wahoo Options); try values like 1.0, 2.0, or even 3.0 if resistance changes between gears are too subtle. You can also exaggerate gear ratios in the Wahoo options to make virtual shifting feel stronger and more realistic [source].

If you need to push more watts on descents or want a more natural feel on flats and climbs, tweak the Zwift Resistance Gain and Offset (recommended starting points: Gain 0.65, Offset 16) [source]. Make sure FTMS bike setting is disabled if you want QZ to use the virtual gear table; otherwise, it may not apply your custom gear ratios [source].

For the 3-second delay after gear changes, this is mostly due to trainer communication latency and QZ waiting for a response before sending new commands. You can try enabling debouncing in QZ accessories, lowering polling intervals, and reducing gear gain (try 0.5 or 0.2 for smoother shifts), but some delay is normal for Direto XR [source]. The trainer itself typically takes 0.7–1 second to respond, so QZ shows the real latency.

Always change gears using the QZ app’s gear tile, not directly on the bike, to avoid Rouvy overriding resistance [source]. If you still find resistance too hard or too soft, keep experimenting with gear gain and resistance offset until it feels right.

If you want a step-by-step checklist:

1. Connect QZ to Direto XR first, then connect Rouvy to QZ on a separate device.
2. In QZ, disable FTMS bike setting, enable Virtual Device, and set gear gain in Wahoo options.
3. Adjust Zwift Resistance Gain/Offset and gear ratios as needed.
4. Enable debouncing and lower polling intervals for faster gear response.
5. Change gears only via QZ app, not on the bike.

Let me know if you need more specific values or troubleshooting!

To reply, just mention @dosu.

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[GoustiFruit]

Man, you answer faster than I'm able to read. I'll need hours only to follow the instructions !

[cagnulein]

Hi @GoustiFruit for the delay: do you have the delay even on rouvy virtual gearing implemention?

Could you please collect a debug log so I can check your setup? https://github.com/cagnulein/qdomyos-zwift/wiki/How-do-i-get-the-debug-log-in-case-something-doesn't-work%3F

Thanks

[GoustiFruit]

I'm gonna check, ASAP.

[cagnulein]

😂 Roberto Viola Software engineer and open source enthusiast http://robertoviola.cloud Il giorno lun 15 set 2025 alle 10:18 GoustiFruit ***@***.***> ha scritto:

…

Man, you answer faster than I'm able to read. I'll need hours only to follow the instructions ! — Reply to this email directly, view it on GitHub <#3688 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAALYWA47J2LMPW2N4UAGQD3SZY5JAVCNFSM6AAAAACGQQXQYKVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTINBQGEYDIMI> . You are receiving this because you commented.Message ID: ***@***.*** com>