Originally Posted by tedder
These are not noise reducing. They are the same as the $10-20 earbuds on the market as far as noise reduction is conerned. Feel free to give the EPA NRR if this is incorrect. (Etymotics had a nice NRR)
I just looked and the website doesn't give the NRR in the technical specs, which is a pretty good indication they won't be any good on a bike. I'd love to be proven wrong since my ER6i's aren't going to last forever.