On/off trail sled question...

Pmknman

Member
My vote is a cat... I ride a 17 cat high country limited messed around with float shock pressures and it handles pretty good on trail.. well handles best when trails are whooped out and rough but who likes those.. off trail she is real good.. I really like the low clutch engagement as no spin out when trying to go slow in da trees
 
T

Tracker

Guest
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why would the shocks widen your stance .

the old technology widens the ski stance as the arms go up.....heres the new tech which shows they want to keep it all inline now and not widen since most tune their sleds wrong and have the front shocks set really really soft....set it hard and it does the same thing as this video shows at like 20 seconds or so to 30 I think....they made it do this since its too hard to tell a hardcore sledder that he has been doing it all wrong for many years....so they let them set the fronts soft and they made the machine do the work since guys cannot figure this out....even you could not envision WHY it would become wider....I thought you rode a lot? never thought aboot what the suspension does when you set it a 55 psi or 85 psi eh?

 
T

Tracker

Guest
BTW tracker sweet sled!

thanx dude......I have the XF 8000 CROSSTREK ES...love it...its a BEAST on the trail and off the trail...serious acceleration but I modded mine....did a wheelie so far and knocked me helmet off and it almost came up on over on me...scared the bee jessus outta me.....dam this thing is quick...rides like a Cadillac also...plush...turns on dime...lands flat....easy thumb pull....I put on LED light bar lights...unbelievable seeing distance at night and off trail....love it
 

ezra

Well-known member
the old technology widens the ski stance as the arms go up.....heres the new tech which shows they want to keep it all inline now and not widen since most tune their sleds wrong and have the front shocks set really really soft....set it hard and it does the same thing as this video shows at like 20 seconds or so to 30 I think....they made it do this since its too hard to tell a hardcore sledder that he has been doing it all wrong for many years....so they let them set the fronts soft and they made the machine do the work since guys cannot figure this out....even you could not envision WHY it would become wider....I thought you rode a lot? never thought aboot what the suspension does when you set it a 55 psi or 85 psi eh?

less than a inch In full compression
 
T

Tracker

Guest
less than a inch In full compression

still don't get it eh....when the factory setting on a mountain sled is 55PSI on the front shocks the a-arms move X amount towards the engine....up....which in turn widens the ski stance....1 inch up on both sides equates to 4 inches wider....this is not exact math just an estimate....for me to be exact I need the angle to the dangle then figure the triangle and we can find exactly how much it moves every inch...the new version does not move them up towards the engine but rather inboard towards the center of the sled...which is another angle that does this and it nullifies the widening...not all of it...most ALOT of it....so that the widen might only move 1 inch every 1 inch up....capeesh....the higher the PSI on front shocks the less the widening occurs....or the widening occurs only momentarily for a split second where as the other way it occurs until you get on top and WOT lifts the weight off the front and it all relaxes
 

ezra

Well-known member
still don't get it eh....when the factory setting on a mountain sled is 55PSI on the front shocks the a-arms move X amount towards the engine....up....which in turn widens the ski stance....1 inch up on both sides equates to 4 inches wider....this is not exact math just an estimate....for me to be exact I need the angle to the dangle then figure the triangle and we can find exactly how much it moves every inch...the new version does not move them up towards the engine but rather inboard towards the center of the sled...which is another angle that does this and it nullifies the widening...not all of it...most ALOT of it....so that the widen might only move 1 inch every 1 inch up....capeesh....the higher the PSI on front shocks the less the widening occurs....or the widening occurs only momentarily for a split second where as the other way it occurs until you get on top and WOT lifts the weight off the front and it all relaxes

I suggest just welding a rod in place of the shock . and it is not close to 4 inch wider stance . and if you are on a side hill and hit something hard enough for full compression of your shock you have more to worry about than a split second of 1 inch of a wider stance chances are you are now knocked off your line and brapping with a leg hanging all to way out to recover
 

Pmknman

Member
My wife will be riding a 2018 cross country 800 soon... lol yup seasons almost done but she will... in da u p now she is wishing she had it now.... if she has a tail light to follow she will .. no matter what we come across.. she ain’t scarrred .... she rides better than a lot of dudes I bring up with us.... floats are nice but a pain in da ars....
 
T

Tracker

Guest
I suggest just welding a rod in place of the shock . and it is not close to 4 inch wider stance . and if you are on a side hill and hit something hard enough for full compression of your shock you have more to worry about than a split second of 1 inch of a wider stance chances are you are now knocked off your line and brapping with a leg hanging all to way out to recover

exactly WHY do you think ALL mountain sleds are narrower? and they have a 38 or 39 inch stance from the factory....because they ride the shocks soft and when it does it becomes 42 inches just like all the trail sleds...anything yet? I have rode with tight shocks and 42 inch stance out west...have you actually tried it?

you are now knocked off your line and brapping with a leg hanging all to way out to recover[/QUOTE]

this only happens to the rider because hes not good enough or was caught off guard....it does not have this effect on ANY SLED....you actually have to try it to know something
 

thebreeze

Member
Tracker, with all due respect, there are people on this forum with a great deal of experience and skill riding steep/technical terrain. Ezra is one of them. I also like to think I have at least a little bit of experience in this type of riding as well. There is a reason we run narrower ski stance. None of it relates to the geometry theory you are throwing out there.
 

frnash

Active member
I suggest just welding a rod in place of the shock . and it is not close to 4 inch wider stance . and if you are on a side hill and hit something hard enough for full compression of your shock you have more to worry about than a split second of 1 inch of a wider stance chances are you are now knocked off your line and brapping with a leg hanging all to way out to recover
And maybe you don't want that "wide stance" on yer sled, either, just ask former US Senator Larry Craig (R - Idaho) about that (click →) "wide stance" thing! :devilish:
 
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Tracker

Guest
Tracker, with all due respect, there are people on this forum with a great deal of experience and skill riding steep/technical terrain. Ezra is one of them. I also like to think I have at least a little bit of experience in this type of riding as well. There is a reason we run narrower ski stance. None of it relates to the geometry theory you are throwing out there.

its narrower to get between trees and to side hill easier.....but the stance widens out to 42 or 40 when sidehilling...its geometry and its the reason why the new mountain sleds move the a-arms inward now and not upward...did ya watch the film there breezy...its called alpha one above....hows fish creek road been to ya? I aint been in awhile...got a pic of lolo? and I hope you don't think the stance remains 38 when your skis are under snow 3 feet deep and sidehilling pressure is greatest on hill side....curious as to what YOU think the geometry is and the stance when pressure is applied upward in deep snow?
 

srt20

Active member
its narrower to get between trees and to side hill easier.....but the stance widens out to 42 or 40 when sidehilling...its geometry and its the reason why the new mountain sleds move the a-arms inward now and not upward...did ya watch the film there breezy...its called alpha one above....hows fish creek road been to ya? I aint been in awhile...got a pic of lolo? and I hope you don't think the stance remains 38 when your skis are under snow 3 feet deep and sidehilling pressure is greatest on hill side....curious as to what YOU think the geometry is and the stance when pressure is applied upward in deep snow?

I have to rebuild my front shocks on my RMK this summer. I will measure how much wider the stance gets throughout the travel.

I have no doubt that the stance does in fact widen until the a-arms are perfectly horizontal. But past horizontal up or down they go back.
Also, I think your 4" claim is quite exaggerated.
 

indy_500

Well-known member
If it ever snows like the old days I don't think a cross over sled will be worth a darn , still waiting for the old days to come back , still may be a long wait

Late december and early January was stupid deep, you were too busy cutting wood!!!
 
T

Tracker

Guest
I have to rebuild my front shocks on my RMK this summer. I will measure how much wider the stance gets throughout the travel.

I have no doubt that the stance does in fact widen until the a-arms are perfectly horizontal. But past horizontal up or down they go back.
Also, I think your 4" claim is quite exaggerated.

OK....remember 2 inches on each side for 4 inch total....and what you will find out is it widens even farther than that...at least you realize that it does widen...that's half the battle

PS...if you run shocks with huge PSI or spring overs tight on travel you will notice that the squat or widen only happens rarely...but when soft it widens just from sitting on sled...and the fatter you are the more it widens
 

rp7x

Well-known member
15 pro ride rmk , from ride ht to full compression no change , if I lift off the ground it narrows 1.25 total only 5/8" per side , chew on that for awhile
 

srt20

Active member
OK....remember 2 inches on each side for 4 inch total....and what you will find out is it widens even farther than that...at least you realize that it does widen...that's half the battle

PS...if you run shocks with huge PSI or spring overs tight on travel you will notice that the squat or widen only happens rarely...but when soft it widens just from sitting on sled...and the fatter you are the more it widens

I completely understand how suspension geometry works.

Also remember that is you ride with your preload set so that your a-arms are horizontial with you on it, your ski stance will be at its widest point. Therefore any suspension travel, UP OR DOWN, will result in a narrower ski stance then what you started with.
So it goes both ways, you can make it always narrow up.

Again, I will say it is not as dramatic as an old trailing arm sled. Those would widen or narrow alot.

Also affecting it is the length of the suspension travel. The more travel, the more the stance will change.

Suspension travel also affects bump-steer. I will check how much the bump steer changes during the full travel as well. Though I think this really means nothing on a mtn sled. And only means slightly more on a trail sled. The only type of riding I would even think about correcting it would be oval racing and MAYBE snocross racing.
Same with adjusting Ackerman into the steering.
 

srt20

Active member
15 pro ride rmk , from ride ht to full compression no change , if I lift off the ground it narrows 1.25 total only 5/8" per side , chew on that for awhile

If it narrows at full droop, it has to widen at perfectly level A-arms. Its physically impossible not to.

Though I still dont believe it widens 2" per side. Though I have been wrong before....
 
T

Tracker

Guest
15 pro ride rmk , from ride ht to full compression no change , if I lift off the ground it narrows 1.25 total only 5/8" per side , chew on that for awhile

I chewed on that for aboot 7 seconds then reread this part...then I read somtin else since this wasn't cuttin it jethro

from ride ht to full compression no change

PS...please tell me your not a drive train don't change with lug heights guy?.....DOH

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If it narrows at full droop, it has to widen at perfectly level A-arms. Its physically impossible not to.

Though I still dont believe it widens 2" per side. Though I have been wrong before....

ya he didn't think that thru....and remember...A-ARMS are from the UNSERS and INDY CAR DESIGNS....it widens as you go around the bend to hold the car on the track at 200mph...one down and one up....but widen it does
 
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