question about coil bind

[Bryguy17]

I need a new spring for my reign's backside, and I've been looking around. It seems our buddy CalEpic can give me a really sweet deal on a spare Ti spring he has, but there's a snag.

My shock is a 7.875x2.25, and I'm running a 2.35 stroke fox coil on it right now. The ti spring in question is a 2.25" stroke. my question: will I run into coil binding problems if I run this spring? I could answer that myself if it were steel, but I know that ti springs tend to have fewer coils for a given stroke length, and are less prone to coil bind.

Just want to know. It would be sweet to have a ti spring (hey, 200g of weight is a lot), but I don't want to screw up my shock or frame just for some extra lightness/blingness. If I can't run it, I'll just run by the path and figure out exactly what I need in steel

Any comments would be awesome

[Chewyeti]

Test it.
Throw it on your frame and see if it binds at full travel?

Think of it as a car motor.... you know the valve lift (stroke), and you know the total compression of the spring. See if the coils bind , and find the right spring.

Put a bunch of weights on it until it compresses and binds... measure that distance. See if your suspension will physically let the spring compress that much

-Aaron... who spent many hours on a spring compressor in a machine shop LOL

[RacinJason]

Measure the thickness of the spring then count the coils add it all together.
If the squish spring equals more than the stroke you might have a problem.

Its best to not use 100% of your springs compression if possible. Springs are mostly linear but when you take them to the end of the compression they get a little finicky.

[Bryguy17]

Originally Posted by Chewyeti

Test it.
Throw it on your frame and see if it binds at full travel?

Think of it as a car motor.... you know the valve lift (stroke), and you know the total compression of the spring. See if the coils bind , and find the right spring.

Put a bunch of weights on it until it compresses and binds... measure that distance. See if your suspension will physically let the spring compress that much

-Aaron... who spent many hours on a spring compressor in a machine shop LOL

I've decided that I'm gonna do that anyway. honestly, I just can't pass up on a $75 ti spring

now to find some weights to put on it (or I can just have my dad sit on the bike )

[RacinJason]

$75 for TI spring is a great deal.
You know if for some reason you can use it you can always sell it.

Originally Posted by Bryguy17

I've decided that I'm gonna do that anyway. honestly, I just can't pass up on a $75 ti spring

now to find some weights to put on it (or I can just have my dad sit on the bike )

[Chewyeti]

Originally Posted by RacinJason

Measure the thickness of the spring then count the coils add it all together.
If the squish spring equals more than the stroke you might have a problem.

Its best to not use 100% of your springs compression if possible. Springs are mostly linear but when you take them to the end of the compression they get a little finicky.

ALSO most auto spring companies will guarantee the spring rate between a certain distance. We were buying AFCO dirt track car springs, and they said compress the spring an inch... and then from there on it will be linear. From the first inch till near coil bind they should be linear.

Just a fyi useless knowledge.

[DirtymikeTDB]

Originally Posted by Bryguy17

I need a new spring for my reign's backside, and I've been looking around. It seems our buddy CalEpic can give me a really sweet deal on a spare Ti spring he has, but there's a snag.

My shock is a 7.875x2.25, and I'm running a 2.35 stroke fox coil on it right now. The ti spring in question is a 2.25" stroke. my question: will I run into coil binding problems if I run this spring? I could answer that myself if it were steel, but I know that ti springs tend to have fewer coils for a given stroke length, and are less prone to coil bind.

Just want to know. It would be sweet to have a ti spring (hey, 200g of weight is a lot), but I don't want to screw up my shock or frame just for some extra lightness/blingness. If I can't run it, I'll just run by the path and figure out exactly what I need in steel

Any comments would be awesome

Ok, here is the deal, Fox runs there springs ALL with more stroke than the shock has, IE they dont list what shock it fits, rather what the max for the spring is including preload. Thats there deal, others will list what the spring was made for, IE Romic, my romic is a 2.25 stroke, and the Proper spring from romic is a 2.25 stroke shock. So the question comes down to what brand of spring it is, and how do they list there springs, almost everyone but fox lists what teh spring is meant to be on, not what there max stroke is.



You should be absolutly fine, in fact I would bet 20 bucks on it!!!

[Bryguy17]

yeah. I don't THINK i will have much preload on the spring, so that helps. I'm sitting on a 550# right now with between 10-15% sag, and <1/4 turn of preload (enough to keep the collar in place)

I should be picking it up tomorrow, so I'll be able to try it out and find out for sure.

THanks for the reassurances guys. I'm really interested to see what the bike is going to feel like with the right amount of sag I seriously thought it was enough until i measured it.

[thephat]

It sounds to me like you are putting a 2.25 spring on a 2.25 shock. You should be fine.

[Bryguy17]

well bollucks. I stopped by calepic's house today to pick up the spring, and we figured we should make sure everything fit before i went ahead with the purchase. a few minutes later (mind you, pain in the arse minutes) we finally fit the whole shock assembly into that tiny little shock hole. alas, the spring is a little too wide to fit in the shock pocket on my frame. at least the 550# is actually right (i was measuring sag like an idiot...)

[Chewyeti]

crikey mate!

[Bryguy17]

Originally Posted by Chewyeti

crikey mate!

well put chewi. I was seriously disappointed with myself when I figured this out

[DHS]

if the stroke of the spring matches the stroke of the shock. both being 2.25. you will not have any issues. Ti springs are also more supple, not softer, but react better. have fun!