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Just wondering if anyone had any input on a problem I have with a set of Lyrik Ultimates. They were feeling stiff so had them serviced and had a new air shaft which improved them, but the damping wasn’t working as it should they were also feeling kind of gritty on compression.
They went away to SRAM on warranty and had new lowers fitted and returned in ‘working order’ in their report. The forks now work and feel nice at the top of the stroke but there is a rough/gritty feeling when compressed harder and further into lowers, feels very bad, this decreases somewhat the more time they are compressed.
Just wondering if anyone had any ideas before I return them yet again!
Two possibilities that spring to mind.
1. Tight bushings, they may need resizing
2. Out of tolerance hub causing the lowers to not be parallel.
Both pretty easy to check. Drop the lowers, remove the damper and air spring. Remove the garter spring. Try each leg one as a time. They should slide in under their own weight.
If they pass that test, try them together. If they're overly sticky then, try easing the lowers in or out to see if it eases.
Ok cheers. I assumed the original problem was bushings, that’s why they replaced the lowers, it’s very strange that SRAM would have let them come back this way.
What you mean by out of tolerance hub?
Thanks.
The hub may be slightly under width meaning the lowers and getting closer at the bottom.
Mmm yea never ever heard of that, obviously to diagnose just remove wheel and check if roughness is gone? They are still gritty without the wheel. Guess they’ll have to go back to SRAM
Apparently it's quite common, although I've not encountered it personally. It's the reason for the new floating axle design on the fancier 38s. Sounds like it's not your problem though.
Could just be the foam ring under the wiper seal, I had one which was catching on the stanchion and caused a similar feeling. Dropping the lowers and refitting it sorted it out
Guess next step is to take the damper and air spring out. Does it still feel rough?
Try the damper in, does it feel rough?
Damper out, air spring in, does it feel rough?
Ok thanks for the suggestions, I don't have anywhere clean to work on them at mo and don't want to do anything that could spoil the warrenty (20 days left 🙂 ), they have been sent to ZyroFisher/SRAM once again, maybe they did just catch the ring when fitting new lowers but can't believe they let them go out like that. Personally I've always thought it was the damper.
I shall let you know what happens. Just to add, SRAM service time was fast....like four days from sending them off to getting them back, luckily I have access to another set and the sun just came out here in Wales!
So, had a nice new set of replacement forks, although Black lowers not Red but beggars can’t be choosers! SRAM have no red 29er Lyriks in stock. They didn’t say what was wrong with original forks but must have been terminal.
The only question I have is that these new Lyriks sit just below 10%, is this normal? I’m borrowing a set of 2019 Lyriks at mo which don’t sit in travel at all. I tried zip tie trick etc etc and they stay the same. I guess this must be normal and doesn’t really effect anything once sag is set.
It's supposed to be the other way around. The last gen debonair spring was famous for sitting slightly in the travel. The new one doesn't sit in the travel and rides higher generally. Perhaps you have a previous gen fork. No big deal, many prefer the old one. If you plug the code on the back of the crown into the Trailhead App it will tell you what spring it has.
Yea you are right. Must be older debonair. I’ll check nice one for that info.
After checking they are Debonair not Duel Position Air which would be the updated one.
I’ll run them and see how they are.
Turned out they came from factory with 160 sahft not 170. Fair play to SRAM though, changing a buggered pair of forks for brand new Lyriks. Very, very fast service also. Four day tun around.
Wonder if the lowers had twisted. If they've send you a B1 airshaft, don't complain, its way better than the new C1 airshaft!