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20mm thru axle removal problem.

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20mm thru axle removal problem.

Old 12-01-12, 01:21 PM
  #1  
Bokkie
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20mm thru axle removal problem.

Front shock: RS Psylo, 20mm axle.

Pics show my 20mm axle. I released the two lever things at the bottom of each fork. I then pulled out the bar of the axle and wound it out. As you can see the screw-out only came out leaving the axle itself stuck in the hub.

I can see no damage to the axle screw-out part. The muck you see on it is WD40. Otherwise, cleaned up, it looks just fine. Can someone explain to me what else I can try as right now I can't get the wheel off?

Taking the bike to my local spanner monkey isn't practical as I cannot get the bike in or on my car (Toyota iQ if you want to see why). If it needs to go to the shop I could perhaps drop the shock from the headtube and take it in, wheel and all. Trouble is, I've never removed a shock before so I might be in a pickle if it needs special tools to remove it. Do any of you good folks have some suggestions I could try? I really can't see how the bit I screwed out pulled the axle out before which I've maybe done three times in twelve years I've had the bike. Any advice would be heartily appreciated and I hope the pics upload okay onto this thread.
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Old 12-01-12, 01:49 PM
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reptilezs
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not familiar with this axle but here is the manual. 20mm axles was a big deal back then. page 7 and 8 https://www.birota.ru/manuals/rocksho...SL_English.pdf
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Old 12-01-12, 02:26 PM
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Thanks reptilezs. I read it through but it doesn't give any help on freeing a stuck axle or one that seems a bit wrecked like mine. I'll take some pics to the shop tomorrow and see if they have any ideas. The shop is a Cannondale dealer and it's where I bought the bike from way back in 2002. It's too far to ride to but I'll drive over and bump it off them and see what their take on it is. If I have to cut the wheel off and use an angle grinder on the hub that's fine. I don't really enjoy the bike anymore so I'm kind of willing to butcher it and still feel okay! :-)
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Old 12-01-12, 05:53 PM
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Not much to add, but from my foggy memory the old Rockshox psylo I used a few times had that same axle. I recall the whole axle coming out with the part(end cap?) that the lever pops out of. Perhaps the end cap unthreaded from the axle?

I would probably put a little loctite on those end cap threads and reinstall, wait till it's dry, make sure those levers are loose and try again, hopefully it will take the axle with it. IIRC the axle is threaded into the other dropout directly and you don't want to damage those threads, you might be able to find a new axle but the fork lowers would be tricky to replace.

That is all based on my poor memory of how those things worked.

Last edited by wesmamyke; 12-02-12 at 01:00 PM.
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Old 12-03-12, 04:54 AM
  #5  
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It's a pain in the proverbial for sure. I went to the shop I bought the bike from but they've closed down where they are and are reopening in a different location in some ****e location to get to. So, I went to the big shop near home as they sell some Cannondale. The assistant there showed me how easy it was to drop the fork from the headtube. I raced home, tried what he said and sure enough it dropped out just fine. I was relieved as I feared you'd need special tools which you do to work on the headtube but the fork popped out easy-peasy like.

Back at the shop, the mechs looked at it and decided it was beyond their knowledge as it's such an old fork and axle (2002) and they've not worked on 20mm systems. They said, it's not impossible to fix but they'd rather speak to the RS distributor and see if they can help out with the recovery/removal process. The prognosis isn't terminal at this time but the biggest problem is getting the buggered axle out and then seeing if they could get another one which looks uncertain. If RS say no, there's not much hope then I'll cut the wheel off and save the rim. I might have to buy another shock (1 1/8" straight tube) for simplicity as the headtube is built for it. I've been thinking of building new wheels but first things first, I'll let the shop contact me about the options I have with the fork at this time.

If i have to replace anything expensive, Mrs. Wife is not going to be a happy bunny. :-)
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Old 12-03-12, 10:00 AM
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Originally Posted by Bokkie View Post
It's a pain in the proverbial for sure. I went to the shop I bought the bike from but they've closed down where they are and are reopening in a different location in some ****e location to get to. So, I went to the big shop near home as they sell some Cannondale. The assistant there showed me how easy it was to drop the fork from the headtube. I raced home, tried what he said and sure enough it dropped out just fine. I was relieved as I feared you'd need special tools which you do to work on the headtube but the fork popped out easy-peasy like. Back at the shop, the mechs looked at it and decided it was beyond their knowledge as it's such an old fork and axle (2002) and they've not worked on 20mm systems. They said, it's not impossible to fix but they'd rather speak to the RS distributor and see if they can help out with the recovery/removal process. The prognosis isn't terminal at this time but the biggest problem is getting the buggered axle out and then seeing if they could get another one which looks uncertain. If RS say no, there's not much hope then I'll cut the wheel off and save the rim. I might have to buy another shock (1 1/8" straight tube) for simplicity as the headtube is built for it. I've been thinking of building new wheels but first things first, I'll let the shop contact me about the options I have with the fork at this time. If i have to replace anything expensive, Mrs. Wife is not going to be a happy bunny. :-)
Suggest read back to the earlier threads which beat to death the issue of whether one should buy tools or not... I think the basic conclusion was to buy any specialty tools which might be required to fix your bike unless you live next door to a fully equipped LBS. If not willing to do that, then the answer is to not buy any bike that has any odd or funky bits.
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Old 05-30-16, 09:10 AM
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Four years on and thought I'd login for old time's sake and see if there is anything else I can consider doing to the shock. The bike's stripped down and packed in the loft. The shock I removed years ago languishes in the shed, in its buggered condition. I'd like to try and repair it and I sort of get the impression you can get a 20mm axle that's internally bored to accept a 15mm QR? I reckon I could use one of those reverse threaded tools that'll wind out the axle giving me the option perhaps to replace it with an adapted 20mm axle...assuming I can still find one. There can't be many bikes on the planet that use 20mm axles anymore? Any thoughts on a 20mm - 15mm converted axle?
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Old 05-30-16, 09:46 AM
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It seems to me the easiest and most direct approach is to buy a new, modern fork. Remove the front wheel from the old one destructively and lace in a new hub or replace it entirely.
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Old 05-30-16, 10:05 AM
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Lower casting checked for its hole alignment relative to each other ? bending or warping is possible

They made a lot of them.. one may not have come out Perfect.
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Old 05-30-16, 10:17 AM
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Originally Posted by fietsbob View Post
They made a lot of them.. one may not have come out Perfect.
Crash damage is also a possibility.
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