Have a stock 2017 Slayer msl90, was looking to upgrade the weekend to Santa Cruz reserves. I'd love to have the widest room they offer, and checked things out at the shop. Stock rims with 2.5 dhf are 63mm wide and clear. What would a 37mm rim do to that?
Personally I think it won't make much difference, but I don't want to make a mistake and have to go down on tire size?
Is there a manufacturers recommendation for these bikes?

Thanks in advance!