It is. The capacity is slightly reduced compared to using 3 bolts like on the Diverge STR or canyon. Interestingly though the STR and regular diverge forks have the same weight capacity. 2 bolts the capacity is 3kg (6.6 lb) 3 bolts is 4.5 kg (9.9 lb) per bag. The fork is rated for 6 kg total (13.2 lb). So on the specialized fork the limiting capacity is the fork and not the mount. My full review will be on gravelcyclist.com soon. I cover this in the review but good catch for noticing that. One thing though you have to use the top two holes of the mount if only using two bolts.