How does the internals of adjustable travel work?`

projectsome

Was just having a discussion about how it works and it seems neither of us have a clue

We speculated, as you turn the travel lever a corkscrew method would turn pushing spacers up or down but then we thought what about the oil etc?

supersonic

With uturn, the coil is wound through a big plastic helix which also acts as the push rod. So as the coil gets shorter, the negative bit gets longer - cunning.

Anonymous

Ah, so the Uturn helps resist bottoming out as it gets shortened?
That is devious!

supersonic

Well the spring rate is increased, but that is due to the smaller coils binding earlier due to less being in the positive region.

Long negtives springs do not prevent bottom out.

Anonymous

:oops: oh yeah!

supersonic

Hehe, I knew you'd eventually visualise it - just as well, not easy to explain lol.

Anonymous

I think where I went wrong was visualising the spring acting like a pull shock! :oops:

Northwind

So how about air u-turn then? I'm sure I could figure it out if I had one to take to bits, or at the very least injure myself while breaking it beyond repair.

supersonic

Works in a similar fashion by moving the 'push rod' up and down, preventing fork extension.

xtreem

Does the U-turn provides exactly 45mm of travel adjust?
Because I can only lower it to 100. :?

Oh, did I mentioned that I bought a Recon 351 140mm U-turn with Maxle for £270 new?

supersonic

Air Uturn is 30mm, coil Uturn is 45mm, but some new forks are now 40mm.

2-step is one big 45mm adjustment. The new sytem on 2011 Revs, Dual Position air does similar with 30mm.

projectsome

Xtreem wrote:

Does the U-turn provides exactly 45mm of travel adjust?
Because I can only lower it to 100. :?

Oh, did I mentioned that I bought a Recon 351 140mm U-turn with Maxle for £270 new?

does this mean I can get a uturn added to my recon's then?

jayson

projectsome wrote:

Xtreem wrote:

Does the U-turn provides exactly 45mm of travel adjust?
Because I can only lower it to 100. :?

Oh, did I mentioned that I bought a Recon 351 140mm U-turn with Maxle for £270 new?

does this mean I can get a uturn added to my recon's then?

I fitted a U turn spring to my tora forks with no probs,ive been told that some forks dont have long enough stanchions to fully extend so ive changed mine from 100mm to 110mm to avoid any potential probs and it works a treat.

projectsome

jayson wrote:

projectsome wrote:

Xtreem wrote:

Does the U-turn provides exactly 45mm of travel adjust?
Because I can only lower it to 100. :?

Oh, did I mentioned that I bought a Recon 351 140mm U-turn with Maxle for £270 new?

does this mean I can get a uturn added to my recon's then?

I fitted a U turn spring to my tora forks with no probs,ive been told that some forks dont have long enough stanchions to fully extend so ive changed mine from 100mm to 110mm to avoid any potential probs and it works a treat.

What's the average price and what's the advantages?

jayson

I paid £47 for the spring from TFTuned cause the stock medium spring in my fork was a little soft so i put an extra firm in there and its loads better, i dont have the 50% sag it had before and it doesn't blow through all the travel at the slightest bump now either.