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I'm a fairly big guy and want the cheopo 29" 120mm Recons on my Winter hack Bizango to ramp up more going into their travel.
Not taken off air cap yet but I'm assuming it won't allow tokens to screw in.
That said, if I wedge some closed cell foam into top of air tube (with a central hole to allow air down) I can't see any reason why it won't work in the same way as a token as long as I don't put too much in and it hits the foam when bottoming out!...
Grease can move around etc, the foam seems a slightly more elegant bodge.Lol
Edit: Not looking to make these into Pikes. I'm aware they are a cheap fork.
Tokens work by reducing the air volume. Closed cell foam is compressible - the air in it will compress by as much as the air it displaced - so I don't think this will work.
Standard way is to put oil in there, isn't it?
What about some Formula Neopos?
See if anyone has some second hand or spare ones one here.
What about some Formula Neopos?
I'm tempted to try these for my Sweep. Basically closed cell foam.
Standard way is to put oil in there, isn’t it?
Not if they are solo air. The oil goes through the transfer port and fills the -ve chamber.
Yeah, seen those Formula things but a little on the expensive side.
As you say molgrips I've heard of people putting oil/grease in forks but the consensus seems to be that it eventually migrates past the bottom seal?
sl2000... That's a good point but I'm wondering just how much those closed calls will compress in reality. On top of that the physical foam takes up some air volume.... Though not much i should think.
I suppose something light and solid plastic is ideal. Just like a Token! Lol
I think I'll try the foam and do some experimenting!
Any other materials that you guys think might work better though? Feel free to tell!
A dense closed cell foam similar to the neopos should work. I think the advantage with the neopos token is that because it will squish a bit under pressure it will give a softer ramp up transition than a hard non-compressible token. The small air pockets in closed cell foam will act like mini air springs that will ramp up pretty quickly themselves, plus you have the material volume. It could be interesting to experiment.
Alternatively I retro fitted an newer air cap with the thread to take tokens to a set of old pre-token Sektors. Not sure if the Recon's have a threaded cap available.
Older Pike DP tokens where rubber, I just skimmed enough off to fit the top cap. What about a plastic wine cork?
Alternatively I retro fitted an newer air cap with the thread to take tokens to a set of old pre-token Sektors. Not sure if the Recon’s have a threaded cap available.
Interesting....Will look into that.
Older Pike DP tokens where rubber, I just skimmed enough off to fit the top cap. What about a plastic wine cork?
Double interesting. Both the wine cap idea and DP tokens.
Ordered a 32mmm top cap for Rebas etc.... Will see if it fits and go from there as it is "token compatible".
I feel some Dremel action coming on.
I've just Googled the Formula Neopos - https://www.pinkbike.com/news/review-formulas-neopos-volume-spacer.html. Sounds to me like they do the opposite of what's wanted with tokens? They slowly compress - so if you're braking or riding down a steep section you lose your 'token's. They also apparently don't compress during the mid-stroke but do at the end-stroke - so you lose progression at the end of the travel and are more likely to bottom out.
Sl2000, I agree. They make the travel more linear overall apparently.
Decided to see if the SID/Reba air cap will fit as if it fits I can just fit some normal tokens. We'll see on Saturday when it turns up.👍