Gutted, are my forks totally goosed ? Picture included
I look after my kit realy well, so its not a case of time neglect, I keep the seals cleaned and have regular servicing, I dont power wash. but after one ride yesterday, with previously perfect stantions, I arrive home and discover this damage (see pic) I presume that somewhere along the line something fairly nasty has got behind the wiper seal. Its on the air side of a FOX Float RL 140. fitted to a ZestyPosted 5 years ago
Question is Are my forks totally knacked now, I know I can get an upper assembly but that’ll prob cost more than a set of replacement forks.
I have the offer of some used RLC Talas, or a great deal on some new 150mm revs ? Or shall I just keep riding the forks till they die now, as I said its on the air side not the damper side. What would you do ?
Have heard some very mixed reports on the TALAS saying that they arent as good as a fixed length fork etc
If you’re worried about stanchion damage, then don’t buy secondhand. Some people do drop their lowers, and change their oil regularly (like me), and some don’t – so the stanchions may look fine, but actually aren’t.
Revs are far nicer than TALAS, plusher, and have less reported issues. You get spacers in with the Revs, so you can drop them to 140 too. Don’t bother with the RLT version though, just get the RL – who actually bothers adjusting the lockout threshold and needs a knob to do it on the fly?
Also – Merlin Cycles will drop 10% off the price when you go to the checkout too, so about £300 for new. Bargain.Posted 5 years ago
Your other option is to buy some Kashima 140 uppers from Mojo, I think the uppers and a service are £250. Which is pretty good, considering you end up with a nearly new fork.
Although I do have to say, how often do you have your forks serviced? Regular to you may not be as regular as they need. Fox are proper smooth and well balanced as a fork, but you really should drop the lowers every couple of weeks to clean the seals, lube the foam rings and lube the seals. It’s a 15 minute job, you wouldn’t run your bike with a dry chain, so why skimp on a £700 pair of forks?
Anyway, that’s in the past – but if you buy Fox again – drop the lowers regularly to keep them going for a long time.Posted 5 years ago
I dont think its a lack of maintenance issue, if like munkyboy I’d noticed a slow wear rate then I’d have said yes I’d ignored a problem and it got worse, my own fault, however they were running fine and the stantions had no marks scratches or wear at all, one hour into a ride, I have this sort of damage, I just lifted the seals and its all pretty clean in there, I am wondering if there is something amiss inside the lowersPosted 5 years ago
but if you buy Fox again – drop the lowers regularly
Are fox known to be more prone to this than Rockshox or other manufacturers ?
And when you drop the lowers, do you need to replace the oil each time, or do you just take the lowers off leaving the fork upside down and retain all the oil that wayPosted 5 years ago
Rockshox are less prone to wear issues IME.
You don’t need to replace the oil when you drop the lowers, just turn the bike upside down and leave it for a few minutes. Take the lowers off, clean the stanchions and the seals with IPA and a lint-free rag, take the foam rings out, pop them in some float fluid, give them a squish, pop them back in the lowers, pop some float fluid on the seals (or some click grease), pop the lowers back on and you’re done.
If you lose any oil from the lowers make sure to put the same amount back in, of the correct weight.
It’s a very quick job, and the third or forth time you do it you’ll not make any mess 🙂
Probably worth buying some crush washers too, if they are deformed or damaged when you take the foot nuts off.
If you get stuck, have a look at the lowers service how to and just have the bike upside down when you do it, and skip removing and refilling the oil.Posted 5 years ago
its the bush running dry and seizing IMO
Fox design means the upper bushes do not get splash lubricated from the oil in the lowers. If you don’t either keep the bike inverted or do the oil the foam rings bit the upper bush will run dry, seize then that happens. the damage could be done very quickly.
However the for will continue to work just with play in the bush. strip,lube then ignore the damagePosted 5 years agoLoCoMember
Yes keep the bike upside down between rides to lube the upper bushes and foam rings as well as flushing them of any soilds that have got past the seals.Posted 5 years ago
The wear is down to dirt ingress, solids sat on/in the seals and bushes, cleaning products also cause issues if they get in the fork as the have degreasing properties.
Recommendations on Fox forks are removing lowers every 15 hours and cleaning/relubing seals and foams and full lower drain, clean and refill every 30, yes I know.
Washing your bike upside down so the dirt,water and cleaning products falls away from the seals also helpsThree_FishMember
My fork service place, took the foam rings out and replaced with an oil seal.
I wonder about this. When the fork is ‘properly’ maintained, the foam rings will be wet with oil and will help to keep the top bushings lubricated. I would expect that stanchion wear to be more likely if the rings are replaced with seals. I’d be interested to know the results from more of those people who made this switch.Posted 5 years ago
Thanks Rickon, I have an annual service, but have never dropped the lowers at yet.
Thing is with older forks a seal clean interval is 30 hours of riding so even a service every year is not going to sort you out IME. I try and do a seal clean on mine at least every 40 hours.Posted 5 years ago
@flow – I did tell my mate who had some reba races to service them – he hasn’t touched them for 3.5 years – his pop-loc internal spring failed but he put it all off. Last weekend “all of a sudden” both uppers are scored – just happened all of a sudden…..
Edit: I did tell him to send them to LOCO and even got him a quote!Posted 5 years agothisisnotaspoonMember
I wonder about this. When the fork is ‘properly’ maintained, the foam rings will be wet with oil and will help to keep the top bushings lubricated. I would expect that stanchion wear to be more likely if the rings are replaced with seals. I’d be interested to know the results from more of those people who made this switch.
Think about the system when its moving, the foam ring collects oil from the stanchion as it compresses and lubricates it as it extends, the outer dust seal is designed to stop crap getting in, it doesn’t work so well in reverse so the foam ring is needed to catch the oil as it rises up through the fork.
A seal will do the same job, it just holds less oil above the bush, it still takes the oil off the stanchion and puts it back at the same rate, infact it should be better as it doesn’t lose oil out of the fork, hence why forks with seals (marzocchi) can last for years without needing an oil top up (that and they’re open bath).
On the OP’s forks, there’s two exlanations why the wear was sudden.
1) it was gradual, but the anodising was hard so gradualy wore through slowly untill a patch of raw aluminium was exposed, which wore quickly.Posted 5 years ago
2) the oil only just ran out.bigyinnMember
tinaspoon. The Float 32 seals are double ended, i.e there are two wipers, an external one for the cack / mud and a similar internal one to stop the oil escaping. The foam ring is there purely to retain oil and feed / lubricaqte the upper bushing.Posted 5 years ago
Otherwise the fork would have oil deposits on the upper stanchions all the time.Three_FishMember
Foxes are not fitted to more bikes than RS I do not believe
Facts!! It doesn’t matter what you believe. This poll suggests that twice as many bikes have (in 2010) Fox forks fitted. Not in any way conclusive, but way more substantive than a hunch.
There isn’t any doubt as to Loco’s tehcnical know-how, just that you and he may not be considering proportions.Posted 5 years ago
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