I'm ~ positive the rims are the same so that would make sense.
Looking at the Heist [tech doc](https://www.eastoncycling.com/media/X5%20REAR%20HUB%20ASSEMBLY.pdf) it isn't clear that the 'Easton X5' driver is compatable with Formula freehub RaceFace is using.
Looking at [photos](https://www.ebay.com/p/Easton-X5-Freehub-Body-Shimano-8022453/1852142836) it could be the same Formula body less the bolt on inside pawl guide.
July 24, 2017, 10:13 a.m. - Andrew Major
I'm ~ positive the rims are the same so that would make sense. Looking at the Heist [tech doc](https://www.eastoncycling.com/media/X5%20REAR%20HUB%20ASSEMBLY.pdf) it isn't clear that the 'Easton X5' driver is compatable with Formula freehub RaceFace is using. Looking at [photos](https://www.ebay.com/p/Easton-X5-Freehub-Body-Shimano-8022453/1852142836) it could be the same Formula body less the bolt on inside pawl guide.