Trials Rising

This is a video guide on how to earn the achievement "Unicycle!" in Trials Rising for doing a 100 meter wheelie.

I recommend using the Rhino bike which is unlocked by normal progression through the game. Also, you will need to progress enough to unlock the Medium difficulty level Firebase Faceplant which is in my opinion, the easiest level to do this achievement on.

Let me warn you first that this achievement is not easy for the average Trials player. I've had a lot of experience with wheelie-ing in previous Trials games (as the Loose Screw skill games were always my favorites).

Anyway, load up the level Firebase Faceplant with the Rhino and get to checkpoint 9. If you are having trouble finding it, here is the location of it on the world map once it is unlocked:

https://gyazo.com/893b0904957cba6fbc6611ed8b7bcfa7

It doesn't matter how long it takes or how many faults it takes to get there. The good news is that once you get to checkpoint 9, you can keep trying to attempt this achievement from there without having to go through the whole level each time (as long as you don't go past the finish line). From the checkpoint you want to first jump over the gap and land normally. Now back up as far as you can so you are on the ramp. Start your wheelie from here and you will need to keep it going without your front wheel touching the ground. You will also need to continue your wheelie over the ramp that you jump off AND still need a little more distance so you will have to land in another wheelie, which is probably the trickiest part of this achievement. If you got far enough without your front wheel ever touching anything, the achievement will pop. You can fault after having done it like I did and still pop the achievement! Also, as you can see there is leeway too since I could have made it even further before hitting the finish line. Good luck, it is not easy!

UPDATE: Wanted to add in another strategy that complements my solution nicely thanks to x Mataeus x - He says "Ride to the finish line, don't cross it but right up to it, then reverse backwards. The ramp will have vanished, allowing you a much easier run with loads of space! Downside is if you fault, you have to do it again, getting rid of the ramp."

so i got a much better solution which is much easier to do
i used the turtle bike from the crash&sunburn DLC

Hey,

For this one you gonna need to cover a distance of 100 meters on your backwheel. Distance only grow when you go forward and you can't touch the ground with your front wheel.

This was my last achievement. It was one of the hardest for me who hate wheelie.
You gonna have to go on the Medium track called "Firebase Faceplant", and go on the last CP which is the 9. Jump off the ramp and start to slowly do your wheelie, then pass over the ramp and continue your way till you get near the finish line BUT you need to stop and go backward the more you can, then go forward again until you get the achievement.

EDIT: It seems like the achievement was probably glitched on my side, because some people got it without even have to go backward to get more distance. The following video might be overkill.

I've made a Guide video:

Thanks to Alpha_Texan !

Easiest way to do this is to go up to the finish line of firebase faceplant and reverse all the way back, now the ramp is gone. You already knew that from the other guides, the thing you're gonna do now is with the rhino go full throttle and land on your mudguard and rear wheel, whilst leaning forward, now just go full gas and pass the finish line. After trying for 2 hours the regular way i did it this way on my second try.

for those who have trouble maintaining the weeling, I advise you to use the donkey because you can block it back, so go to the finish line without the past and go back in reverse the ramp will have disappeared so facilitate the unfolding