-
According to the spiel, they have increased the tyre and mud clearance on the SL. May drop them an e-mail re 650b, see what they say. I like the idea that its 'made for racing' as you say, rather than the Full Monty.
I love my Soma GR, but thinking a 650b which is more aggressive (and cheaper/lighter!), could be fun too, and also something I can feel slightly less precious about.
-
Here is the XLS clearance with 33c, the frame doesn't widen much to allow for 650b to really work, hopefully this new SL has fixed that.
Just realised it's a new model!
If the XLA is like the XLS, be careful on max tyre clearance, you really can't go bigger than 33c on the XLS (even with 650b it'd be a struggle), it's built for racing.
I can't see it mentioned in the description, where as the Full Monty says 40c and would be better for gravel duties.