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Speed/cadence wheel size works but seems wrong [smart trainer]

I've got an Elite Suito that detects speed and cadence just fine with my Edge 530 using Ant FE-C protocol. However, since the 935 doesn't have FE-C, I'm using the speed/cadence sensor on my Suito to measure distance and speed. I get that this is indoor spinning and distance isn't terribly accurate but I'd still like something for my records.

The problem I have is the manual wheel size I've found to give similar speed as my Edge 530 is 84 (?!?) mm. Thats one small wheel however it gives me numbers that are reasonable. I thought this number was supposed to be wheel circumference but if I put the correct circumference in i get crazy speeds in excesse of 100 mph.

Any ideas what I'm doing wrong?

0 tmk2 over 4 years ago

Why do you think you're doing anything wrong? Read this:

https://elitesrl.zendesk.com/hc/en-us/articles/360001046434-Speed-value-configuration-with-MyETraining-and-third-party-apps

The most interesting part is:

The Direct Drive trainers with the integrated electronic board could have the speed sensor in different places, so, there is a ratio coefficient to obtain the right speed value.

Also check out the table. Looks like 84 mm is the correct value for suito.

0 3826824 over 4 years ago in reply to tmk2

Thanks for the help. Now that I've read that link you provided, seems my numbers are reasonable. Thanks

0 HurtaJ02 over 4 years ago in reply to 3826824

I had the same issue with my Direto and I fixed it by applying a formula however same formula did not work for the Suito. For me, after trial and error, and comparing speed/power against the Elite App, I found best number to apply was 88 mm for both my Garmin watch and Edge.