pigl3t

Hello!

I have 1 bent lower leg on my Rockshox Lyrik ( Air spring side). Towards the end of travel at about 150mm in out of 180 total. The dent is about 0.8cm long and maybe 3mm deep ..
It kind of blocks travel. I can force the upper leg in there but it would end up scratched or bent also.
I tried to fix it with some own ideas/improvisations but no success.
Is this something than can be usually fixed? Any ideas?
Thanks!!

P.S. If a moderator would like to help with posting some pictures i attached. Thanks again.

Iride01 

Upload your pics to the Gallery here on BF and someone will post them in this thread for you.

cxwrench

Time for new lowers.

pigl3t

Yep, uploaded to my gallery.

WizardOfBoz

If you provide a url of some form, someone here can use that to upload the pics.

If this is truly a bend/dent in the lower, and it limits travel, I suspect that a new lower will be required. If I'm seeing the pics correctly, the lowers are cast aluminum. You could try to line bore the dent out on the ID, but that would probably mean that your seal would be compromised and you'd lose any shock-absorbing ability in the range where the seal interfaces with the dented area.

Aluminum is generally a poor material to try to rebend back to an original shape, especially trying to cold form the workpiece. Is the pic below similar to the part that is bent?

pigl3t

Yes, looks like this.
​​​​​​Can't post pictures or photos yet ☹️..

70sSanO

Either replace the just lowers or the fork if you want something else, or you get a good enough deal on the same one.

John

WizardOfBoz

Your missing the point. Go to your file server - where ever on the web you've uploaded your pictures to (Google pics works). Get the url. You CAN include a URL in your posts. Make a post with the url in the text. With that URL someone else can go to the URL and upload the pics. This should allow more informed people than me to look at it and tell you whether it can be fixed or is dead.

WizardOfBoz

By the way, I think you need 10 posts before you can post photos, so if you wanted to you could browse the forum and post innocouus stuff like "Ooooh! That's a pretty bike!". Or whatever suits you. Good luck!

cxwrench

That's not aluminum. Try Magnesium.

WizardOfBoz

Thanks, cxwrench. I'd looked at the specs - the upper fork tubes are specified as aluminum. I guess I just assumed that the lowers would be, too.

I grew up working in a machine shop in my dad's small manufacturing plant. We made lawnmowers. Mostly big honkin >20HP units. But we did make one 18" walk-behind with a magnesium deck. Cool stuff, except that exposed Mg corrodes.

FBOATSB

Iride01 

here are you pic's





https://www.bikeforums.net/g/album/25492110

Apologies it took so long. I had to go watch the TdF.

WizardOfBoz

At least you spent your time productively.

I'd say that that fork is toast. Both Al and Mg are bad for cold forming. The metal is weakened in that area and bending it back will weaken it further.

pigl3t

Thanks! Will try to tinker around with it. Ordered an exhaust pipe expander and will try to smooth it from the inside. Was wondering if it would be better done cold or heated up a bit with a heat gun.