[Closed] Normal wheels and forks on fatbike frame, drawbacks?

Well Boost is 148mm spacing and a fat bike frame is 170mm  or 190mm (unless it's one of the old offset frames in which case it's 135mm) so you'd either need some form of Frankenstein converter or for the "normal" wheel to use a fat bike hub.

crankset Q factor is often quite wide on fatbikes but as long as you're happy with that it's an easy goer - likely to need to build up on hubs to suit your frame (it'd potentially be a LOT of spacing for a normal boost hub) but otherwise no trouble)

(I have some 29ers on a fatbike, works fine)

As above - rear hub spacing/cranks is the biggest issue.

29er wheel/tyre is about the same as a 26" Fat tyre so BB height would be about the same.

On-one sold some 'commute on skinny wheels' wheels for a while for their Fat Bikes but I don;t think they sold well.

Also, Most Fat bike frames are designed for short travel/rigid forks and have conservative geometry.

So, it can be done but would be easier (and cheaper if you have to buy hubs and cranks for the fat bike frame) just to get a standard frame to put stuff on.

I’ve got some normal 29er rims built onto fat hubs. Works fine.

Low bb

Low bb

Shouldn't be too low, A Nate is 749mm, 29*2.2 is around 740mm (and the fat tyre will be a smaller effective diameter because it's at a lower pressure so deforms more).

Biggest reason not to is, why bother? Spacers wouldn't really work as you would need to space the disk mount over as well. A Pugsley wouldn't work with a normal rim (I think) as it relies on the offset drilling of Surly rims as the hub is offset a long way to the drive side to get chain clearance, then the rim is offset back to the center. So you have to buy a new wheelset like the On-One Fat/NoFat wheels, which probably isn't going to be particularly cheap unless you can find one s/h. What you can find a lot of s/h is 29ers, you don't need anything particularly bling or fancy to weigh less and have more appropriate geometry than a converted fat bike.