Tire size change

General Discussion
1

Greetings,

So, I’m using a cycleops mag trainer. I just went from 700x25 to 700x28 size tires. My trainers meter now reads about 40 watts lower than my power meter on my pedals. It’s back breaking. Is there a setting in Zwift to adjust this, will it make a difference, or should I just use the meters on my bike.

It used to be the opposite, about 20 watts lower on my bikes meter than my trainer. I used to have a meter that read about the same as my smart trainers.

Anyway, any thoughts?

2

If you have power pedals why are you using your mag trainer estimated power? Your pedals are much more accurate and what you should be using.

1 Like
3

I warrantied them, and the 2nd pair read different results. They seem to be more accurate now though.