@MountainBiker1111111 Thanks for reaching out!
We do have a great set of resources for assembling your new mountain bike purchased from REI. Please check out Expert Advice article How to Finish Building Your New Bike at Home. That should give you a good start and some other links worth checking out.
Hopefully this helps, let us know if you have any other questions!
At REI, we believe time outside is fundamental to a life well lived.
