Originally Posted by
FlashBazbo
I complained to my LBS about the tire capacity issue last week. He tried several times on Friday to get an answer from Trek, without success. (Telephone tag.) He's a fairly large Trek dealer, so I would hope they'll eventually talk with him. Trek should have contacted its customers about this. It shouldn't have been something we "happened to notice" on their website.
I actually think the problem is front derailleur / rear tire interference when using bigger tires. But, either way, there's no excuse for this.
There are many manufacturers that will list tire clearance whether you running 1x or 2x with 1x having the most. If Trek did this I wouldn't really fault them and would make sense so it's odd that they wouldn't if that was actually the case. How close is your 45c tire to the seat tube at the closest spot? Isn't the isospeed decoupler supposed to make the whole seat tube deflect back and forth?