Rumor has it I should be able to fit my Niner wheels/tires on my 27.5 + bike the only problem is as you see below. Can anyone help me figure out what I need to fix this or is the conversion not possible?
It looks like you have a Stans wheelset with Novatec hubs. I am not sure if they make spacers for the wheelset for the conversion you are seeking.
Looks like you have a boost fork that you're trying to put a 15x100 wheel in? I'm guessing your rear wheel is either a QR 10x135 or 12x142? The bike you list in your profile uses a boost 148 rear. I know spacer kits exist for the front wheel but not sure about the rear.
how reasonable would it be to swap the hubs for something that wouldn't require a conversion? I mean if we are talking over 300$ then i could just get an extra set of niner wheels that actually come with correct hub spacing.....I was hoping something as simple as a washer would fill those gaps - but there is some talk of that creating a risk for catastrophic failure. PS i need to update my profile - i have a newer bike now (Specialized Stumpjumper FSR Comp 6 Fattie) hence the curiosity about a conversion https://www.specialized.com/us/en/bikes/mountain/trail/stumpjumper-fsr-comp-6fattie/107081
I would personally use the spacers, since it's still the axles supporting the wheel, but some people seem to be paranoid about 'extra stress' spacers might create. There's also boostinator by lindarets for some hubs. they are replacement endcaps but I think they require you re-dish your wheels.