MikeK wrote:Cannatonic wrote:
re: balance point - isn't it supposed to work this way? You want you tip to rise a bit when you lift the ski?
You know, I've heard it both ways. I've heard "Mount on balance and the tips will float up" and "Mount on balance and the tips will dip down and stay in a track".
Mounting pins/toe bar on center is the starting point for "classic" kick and glide skiing. Mounted on BP the ski should feel perfectly balanced during the glide phase of kick and glide- with even weight fore and aft of the mounting point. In other words- the ski shouldn't feel weighted towards either tip or tail. In a K&G context, moving the mounting point forward of BP increases grip- by putting more pressure on the tips; moving the mounting point aft of BP increases glide- by putting more pressure on the tails (your heel is flat on the tail of the ski during the glide phase of K&G).
From a XC perspective- a forward mounting point should work against tip rise- in the absence of tip rocker...
The toe bar on NNNBC is slightly further back than on NNN- shifting a bit of weight forward- giving a bit better grip and turn initiation than NNN at BP- makes sense to me. (It's important to remember that track NNN ain't the same as NNNBC- a track NNN setup on BP should produce a near perfectly balanced ski.) Rottefella's NIS system is intended to offer a XC skier the option of modifying mounting position without having multiple pairs of skis.
(Freestyle skate skiers play with mounting position a lot as well. By definition- they MUST pick up their skis as they stride forwards- they compensate for an unbalanced ski by using a very stiff flexor (this also reduces heel lift).)
If a 3pin mounted at BP feels "tail-heavy"- compared to a NNNBC setup- then it should offer a bit better grip and turn initiation than NNNBC. This might actually explain a lot...
(As an aside- my old friend- that used to work in a Nordic ski shop as a tech- has an old NN metal mounting jig with a different mounting point for "race" and "touring". The "Touring" position is slightly forward of center...)
I put NNNBC on my XC-oriented XCD skis. Therefore, I prefer them mounted on BP. On the downhill, I have to pick up my long XCD skis a lot anyway- therefore having aggressive turn initiation on my XCd skis doesn't help me much- and it would also reduce K&G performance.
Most I have mounted ahead of balance so they tip up naturally.
This doesn't make sense to me- your heel is flat on the tail of the ski during the glide phase...A forward mounting position will put more weight on the tips...
Historically, skiers moved mounting positions aft to increase performance in deep snow- and encourage tip rise.
Rocker has allowed for a forward mounting position- without losing tip rise...