Springs selection impact on suspension?

[bergerhag]

54 is stock on FSE, and that was too soft. On saturday I'll take her out on a rocky enduro competition. Will keep you posted.

[widebear]

Bergerhag . You are stating your spring rates in newton meters. over here I believe, somebody correct me if I'm wrong, we measure in kg's per mm, I dont know how the values correspond but none the less if it was 6.2 kg's per mm we would be right in Ford light truck category

[bergerhag]

Sorry, Newton meters was a typo, should be N/mm.

I mounted the 6,2 kg/mm rear spring, sag was 40mm, race sag was 105mm. Does that make me a light Ford Truck then?

Aren't those numbers pretty good? Perhaps if I set the sag to 35mm I would get a race sag of 100mm? Bike weight is 130 kg, My fully dressed weight with water backpack 118kg. Thats 286 pounds for bike and 260 for me.

The Ec300 has 5,2 kg stock spring, the FSE has 5,4 kg.

Are you sure that my spring rate is that much off? Every suspension page I have come across says race sag should be ~100mm.

[widebear]

Your correct those numbers sound very good, i cant dispute that. and you have a decent ammount of free sag, the bike should turn very well with 100 mm race sag. I guess the fact that its a stroker requires that it have a higher starting spring rate starting point.

[bergerhag]

I have now been out on a few test rides. It's hard as a light Ford truck when riding slow to intermediate speed. When I increase speed to what feels like "world champion" speed, it works very nice. However my adrenaline levels are reachin critical.

Tomorrow I hope to test it on my ordinary enduro trail, that will make final judgement. As of now, I think I'll switch one of the fork springs back to 0.42 kg.

Darn this suspension thingy. I want Plug and Play.

[KTMLew]

For a linkage bike I use this formula:

Static sag 20-25mm/rider sag 100-105mm. That would indicate correct spring weight for a given rider. From there it becomes rider preference. I set static to 20-25 and then check rider sag. It's pretty obvious if the spring is too soft or too stiff, as you have the static set to your desired number. If rider sag is more than 105 spring is too soft. If under 100 spring is too stiff, etc...

Looks to me like you went too far on both ends. Probably .46/5.8 would get you closer to the "numbers"? You want about 30mm static on the forks and 80mm rider sag.

[widebear]

Thats right You could allways run one heavy spring in one fork leg and one stocker in the other leg , works good for me, try running your race sag in the rear at 110 mm and raise your forks in the clamps to compensate for the slacker geometry

[GMP]

GGs work best with 105 - 110 mm race sag.

[bergerhag]

Thanks for all the input, guys. I'll change one fork spring to stock, that should theoretically give me a static sag in front of 32 mm, and a race sag of 75.

[KTMLew]

After a bit more research it seems they also "like" 35-40mm static? Have to confess I've never laid hands on one...