Let's offroad / mountain bike / mtb / ride dirt

Sure there's not a crack in the frame

It's a Geometron, I'd be surprised. I've checked headtube for cracks, checked welds and can't see anything. It only does it on hard fork compressions, OR turn the bars very lightly and rocking back and forth with no weight on it

my pic with the blue cotic? somewhere near boppard, river rhine, germany. steep and loose ground but fun. there's an official bikepark on that side too. but more for flying daggers kind of riders.

cool!

Oh my

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OR turn the bars very lightly and rocking back and forth with no weight on it

Strange, you’d really think it must be something headset related with this.

Does the fork have a star nut in the steerer or is it one of the removable wedge type ones like the Hope head doctor?

Sometimes the removable ones can be a bit shit, if it moves slightly in the steerer, it can prevent the headset from pre-loading correctly.

Wow, haven’t seen this before. Is that rear derailleur system the same kind I read about on pinkbike a while back?

It's a Geometron, I'd be surprised. I've checked headtube for cracks, checked welds and can't see anything. It only does it on hard fork compressions, OR turn the bars very lightly and rocking back and forth with no weight on it

What happens if you swap the wheel and skewer, then perform the same test?

https://en.nicolai-bicycles.com/nucleon-16/

Riders between 1.64 m and 2.10 m will find a perfectly fitting frame

You’re over 1.64m, right?

Although I had sad face when I seen the price without shock or rear derailleur thing

Just had a thought, although from what you describe, it’s seems unlikely, but the ext shocks can have a very audible click when the shaft compresses on the first couple of millimetres. It’s the check valve opening and closing, mojo can remove it with a service.
Unlikely this actually the cause but worth mentioning since when you give the forks a hard compression, the shock will compress slightly and you’ll hear the check valve open.

It's a standard star nut, it's in bastard tight.

I don't have a different axle to try, but could try the wheel, good shout

I know the sound you mean, and I don't think it's the same one. I can hear that when I put the lockout on

could this be the bars flexing in the stem, rather than the stem itself?

Except I can make it happen pushing down on the frame, as well as the bars.

Some progress...

Knocked the headset cups out and this massive piece of swarf came with the bottom cup. Guessing the previous owner was a bit cavalier about fitting it. I've gently filed off the burr inside and I'll get it looked at by a pro tomorrow. I'm really hoping that reaming it and fitting it back properly sorts it, and the clicking was just metal shards trapped. It looks like it wasn't properly straight in the headtube anyway, the cup shows some wear to the anodising.
Either the click will be gone, or it'll be there permanently and I'll live with it. The headtube is thick as fuck so I'm in no danger of ovalising it, just maybe ruining headsets more regularly

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oh my. when you refit there is a special type of loctite that is recommended to seat imperfect bearings etc. I never used it but would be curious if you decide to. I have an ovalised headtube on one of my bikes

I think the bearing sitting in the cup itself is gonna be fine, it's that the cup was moving on the burr inside

Aren't they renowned for having the air spring full of grease?

@leggy_blonde - this, and I'd ignore the Fox tuning guide it's mostly over kill.

Mine had a ton of excess grease on the top of the air spring piston, and no oil at all. I cleaned it out replaced the grease with the RSP equivalent, put the 5ml of oil in the top, and replaced the oils with one step lighter Motorex. It's plush now. Also just remembered that the air transfer port was blocked on arrival, was resolved with a little drop, and a short fart sound.

Were the bearing cups steel? Had a similar thing on my Orange Crush.

Alloy cups, they're Hope. There's barely a mark on them, that metal is from the inside of the headtube.

cheers!

Former BMXer riding MTB dirt jump stuff now was in my mate's shop the other day. #csb

https://www.youtube.com/watch?v=8tXUJ_i6uTM&t=8603s

https://www.youtube.com/watch?v=XuwZFud_cF8

Mike Ross' superman front-flip is pretty cool too.

RAAW just posted on Instagram- they’re offering a limited run of frames with Ohlins shock and fork.

Will you get a black Jibb, so as to not confuse the two?