In 2020, I ordered a Pole Taiga L (Pole Taiga page, sadly no longer available) frameset. It is slack, low, and long, and I can run really big tyres, specifically the Surly Bud and Lou.
May 2021 Update: Pole has removed the Taiga from their site, and according to rumour, the Taiga is "not currently a priority". I think that this bike is easily the best fat bike ever made, and that news is a big blow.
September 2022 Update: You can use a 12 spd SLX derailleur with 11 spd shifter and cassette. Works superbly!
Things I learned
The build took months, and there were a lot of details to sort out, but it was so worth it!
This thing flies down trails!
The fatbike craze is well and truly over.
Some of the components were hard to find. I wanted Hope BB and cranks, but since I couldn't find that stuff anywhere, I settled on Raceface. Finding the right spacers for the 120mm frame and RF189 CINCH spindle was hard, until the Swiss distributor sent me a pack.
I wanted DT Swiss Hubs, but again, they were impossible to find. Luckily, someone sold unused Hope hubs back to my LBS, and I got those. Plus, they were orange!
Surly doesn't build the Clown Shoe rims anymore. If you can't find any online, you have to either get carbon rims (which I don't want to trust with my 100kg+), or go 80mm, which makes the tyres rounder.
Pole could do a better job documenting their frames.
I ordered the wrong adapters for my brake disks, because I had to guess.
After a bunch of rides, I also saw that the back is not long or wide enough for 203mm disks, so I will have to scale down to 180mm in the back.
A Pole Taiga frame size L will not really be happy with a 203mm brake disk in the back.
You will need to buy tools
A lot of tools.
Every component that goes on the bike comes with some specific tool. Bottom bracket, cranks, cassette, fork (the star-fangled nut!), they all are attached, tightened, and/or detached with tools that you will absolutely not have lying around.
You will need grease, cable ties, allen keys, and other tools. PRetty important: torque wrench(es) - I had to buy one for low-torque things like attaching stuff to your handle bar, and one for high-torque things like attaching cranks.
You also absolutely need a bike stand, but i guess that is a given.
Whatever Youtube videos say about cutting a brake hose - you will need a bleed kit
When you buy brakes, you should also buy the bleed kit. Chances are you will have to cut the hoses (on Hayes Dominions, specifically, the rear one is crazy long!), and chances are you won't be able to do it cleanly.
Just get the bleed kit.
Parts
I was worried about my choice of drivetrain, but it was good. On the Vitus, the Salsa Mukluk, and the Taival, I was/am running a 11-46 XT cassette. I wanted more range, but not 12 gears.
The Deore 11-51 cassette and matching derailleur have great range, and the cassette is made of steel. I thought that was good for a fatbike. Is it heavier than the XT stuff? Yes! But it works with an XT shifter, and so far, it has been shifting perfectly.
The OneUp dropper with its 210mm drop is really great. Both the Taival and the Taiga have low frames, and it feels good to be able to go that low.
The Hayes Dominion A4 brakes are a lot better than the 2 pot SLX brakes I was used to. Wow!
Trust
It's funny, in a way, but I do trust a bike, down a hill, at considerable speed, that I built myself.
I was wondering about that, before I started riding it. How could I trust myself to build this to be stable enough? With brakes that don't just fail?
But in the end, I followed the instructions, made sure to respect torques, and it all worked out just fine.
I made no really bad choices (except 203mm, see above), I botched only the cutting of the brake hose, and everything is running pretty smoothly.
I'm not an expert. I started riding in 2017. I had a good teacher, I guess (thank you, Kev!), and I don't have two left thumbs.
What I want to say: if you cannot buy your dream bike, build it!
It's really a great feeling when you ride on something you have planned and built all by yourself. Highly recommended!
Changes
I have been riding the Taiga for just over 2000km since I built it, and there was some optimisation to be done.
First change was to replace the rear rotor with a 180mm rotor, so it wouldn't rub on the frame.
The Ergon saddle is great, but it is not for me. So I put Kev's old Selle SMP Plus saddle back on.
I had a coaching session, and the coach suggested I try a longer stem. So I replaced the 40mm Truvativ Descendant stem and am now riding with a 60mm Truvativ Hussefelt. That thing is a monster! In the end, I replaced it with a 60mm Truvativ Descendant.
The Deore Cassette gave up after 1500km in May 2021. I replaced it, plus the derailleur.
In Summer 2022, I read that the Shimano 12 spd derailleurs have the same ratio as the 11 spd. So I bought a 12 spd SLX derailleur and put it onto the bike. Shifting is significantly better now, a real treat! Can recommend!
Build
Look at the cable management!
Parts
It takes a surprising amount of parts to build a bike from scratch. Here is my list:
The wheels are built by Stefan Buser of Lifestyle Cycles in Arlesheim. I simply don't trust myself to do wheels.
In case you are surprised by my choice of cassette and mech: just when I was about to order a 12-speed XT drivetrain, Shimano released the 11-speed Deore group set with a 51 teeth steel cassette. I decided to use that, mainly because that way, both bikes are 11-speed and I can exchange parts, if needed. And also: it's steel!
On top of the list above, I had to buy tools (Race Face 16mm/8mm adapter, Race Face BB tool, Hayes DOT 5.1 bleed kit, Putoline chain wax, ...) and small parts (garmin holder, brake disc adapters, cable end caps, outers end caps, cable ties, and such), and I only got away with this few because over the time I was riding the Vitus, I had already bought a lot, e.g. a bike repair stand.