Originally Posted by
softreset
I'd ask if you did the logical thing and reached out to BMC (you know, seeing it's their bike and label) but I'm going to assume you haven't and made a post here, instead.
We had a batch of Pinarellos at the shop that also had similar stickers. In looking at all of our 2017 BMCs in the shop (moments ago) they too have the "don't use on the stationary trainer" sticker.
I'm waiting to hear back from the BMC rep, just dropped him an email, but considering how many BMCs I've seen in trainers (and how many I've ridden in trainers) I see absolutely no reason why you can't use a trainer with a BMC. I suspect, much like other warning labels, it's to cover their ass in the event you put your expensive bike in a trainer, don't properly secure it and then try to blame BMC for shotty workmanship.
Around this time of year we see an uptick in people who don't properly secure their bike to a trainer, cause a problem (or worse, damage) and then try to peg it on the frame manufacturer.
This.
Here's BMC's website warning about it-
Carbon Care - BMC Switzerland
"Carbon frames are not suited to use on home trainers with a fixed rear axle. When the wheel cannot move then the excessive loads on the dropouts can damage the frame."
Here's a counterpoint from the Zwift blog-
Will indoor training damage my carbon fiber frame? - ZwiftBlog
"If trainers were breaking carbon frames, manufacturers would make it very clear in their warranty statements that using their carbon frames in a trainer invalidates the warranty. I have yet to read a warranty which mentions indoor trainer usage in any way."
Given how many people ride carbon bikes on stationary trainers across the world every day (myself included), I think it's just BMC covering themselves in case you hurt yourself by using a trainer improperly and try to sue.