Hey, Just got a 888rt and have not ridden it. Just wondering if it was good and some of it's weaknesses and some of it's strengths.
i don't follow. how do compression adjustment and head angle relate?Biscuit said:The compression adjustment doesn't really do much. If you have a steeper head angle you may find this to be a problem, the vast majority of people don't.
Mostly to how the fork dives under braking.mandown said:i don't follow. how do compression adjustment and head angle relate?
i see what you are saying. however, i still don't think that the head angle and the compression adjustment are directly related. if the fork's basic compression characteristics are fine for a rider's weight and frame geometry then the ability to adjust the fork is meaningless since no adjustment is needed. a more realistic situation is that the rider will need to adjust his compression for many factors other than head angle. if the fork's design limits the adjustment range, head angle is going to be one small part of how the fork feels.Biscuit said:Mostly to how the fork dives under braking.
When you hit the brakes and your weight shifts foreward, the fork compresses (especially on steep stuff) making your suspension less capable. Extra compression damping helps the fork resist diving.
A slacker head angle isn't as affected by the weight shift and doesn't need this extra damping, allowing the fork to be tuned for bump compliance.
Head angle affects how the fork compresses against bumps also. If you think about the actual angle of impact and the direction the fork compresses, a slacker front end will be more effective at absorbing hits.
I certainly wish the 888 had more noticable compression adjustment, but it seems to be dialed right out of the box (post break in period) for the vast majority of aplications.mandown said:if the fork's basic compression characteristics are fine for a rider's weight and frame geometry then the ability to adjust the fork is meaningless
That's a really good point.mandown said:odd. i would think that a slacker head angle would move the fork closer to parallel with the ground, making front-to-back forces (like braking) more influential.
the RT was the budget version for 04, so the 888VF for 05. no ajustments, with dual SSVF valving the vs HSCV openbath system of the R/ RC. the RT also comes in either 170mm or 200mm.mtbfreerider19 said:Hey, Just got a 888rt and have not ridden it. Just wondering if it was good and some of it's weaknesses and some of it's strengths.
I disagree. In the air, the momentum from the spinning wheel is grabbed by the brake and transferred to bike rotation. The same thing happens on the ground but the bike isn't as free to rotate.mandown said:braking while in the air has different forces than when you are on the ground.
Yes, body position does have a huge impact on the direction of the forces.mandown said:you also have your body weight being thrown forward (like hitting the brakes in the car and having your body press against the seat belt).... i think the force from the weight shift will be tangental to the arc around either axle.
This hadn't occurred to me before. It seems you would have a combination of horizontal and two rotational forces. One pressing the front end down, one lifting the rear up. Since 70% of your braking forces come from the front wheel this would cause a whole mess of moments.mandown said:if you use only your front brake. the pivot becomes the front wheel.
I'm PM'ing this thread to dw since he's the smartest guy I know. And he designed the dw-link which has a lot to do with what we're talking about. (www.dw-link.com)mandown said:somebody with a degree in physics get in here and clear this up for us.
I think people are trying to get this thread back on topic...Sorgie said:The 888rt was a 2004 OEM fork. No adjustments. There's specs for it on the Marzocchi website under OEM 2004 forks.
i gave it a new homeBiscuit said:I think people are trying to get this thread back on topic...
Bastards.