Jamis Renegade Expert/Elite tire clearance

Has anyone tried a true 40mm tire on the Elite or Expert?  Jamis says the carbon frame takes up to 40mm, but I'm wondering how much clearance there actually is.  If a 40 is tightish, I would worry about mud/rocks abrading the carbon at the fork and chainstays.

Here it is with 35's. I don't think 40 would be a problem.

 

These are WTB Nano 40c Race (tubular version) tires ( http://www.wtb.com/products/nano-40c ) on a 2016 Jamis Renegade Expert.  Happy with the clearance.  IMHO 42c tires would fit.  Hope this helps!

 

The question is how tight are they at the back of the bottom bracket??

I should have Nano 40c's on 23mm ID rims on my Renegade by end of the week. I'll post up pics as well.

Thank you!

Here's a shot of the clearance on the seat tube at the bottom bracket on my Jamis Renegade Expert with Maxxis Rambler 40 mm tires mounted

 

How do you like the Ramblers? And are those on the Alex ATD 470s (17mm) or other wheels?

I like the Ramblers.  I've been experimenting with lower pressures 28 psi front/ 32 psi rear.  Great traction and slightly better comfort than 30/35 psi.  I've run over some rocks on purpose and no 'tink' of metal rim on rock.

I am using the Alex ATD 470's.  They are a PITA to set up tubeless. I had to finally use the Stan's 21mm rim strip with the integrated valve stem to get it to work.  Rims are still true and I've given them a pretty good beating