April 26, 2010 at 10:31 pm #89471
Has anyone experimented with the balance point (BP) of their rollerskis?
Specifically, classic skis.
My EagleSport Classics have a urethane rear wheel (45×75) and a rubber front (40×75).
The balance point is 4cm to the rear of the binding pin-line.
For our snow skis, we usually place the binding pin-line AT the balance point.
I was having some difficulty with the front wheel coming off the ground and veering left and right while kicking.
I know this is a common technique problem, but I also think the balance of the ski has a big impact on front-wheel tracking.
I temporarily taped a small battery pack to the front of each ski. That changed the balance point to 1cm behind the pin-line.
In a brief test, they seemed to be much better.
I need to go for a longer ski to test it further.
What do you guys think of this?
Is the balance point important in rollerskis?
Where is the balance point on your rollerskis?
ThanksApril 27, 2010 at 3:29 am #90342
Try a stiffer flexor than the standard classic. I use a red (105?) skate flexor in my Salomon Profil bindings on the roller skis. Other than that, I think it comes with practice. My roller skis, V2 Aero CSs, are quite tail heavy, and I do okay. The longer shafts of classic roller skis should help, too.
I’ve never seen a roller ski long enough to have the balance point at the binding bail, except perhaps some three wheel antiques, and an interesting German design with the ratchet wheel mounted in the middle of the shaft, off of the ground. You had to kick down, or “set the wax”, to get grip. Worked well on the very smooth concrete floor I tried them on, but I don’t know how well they’d work on the road.
RandyApril 27, 2010 at 7:45 pm #90343
Rbladel, who makes those rollerskis you were talking about where you set the grip? I’ve seen this done as a school engineering project and the idea intrigues me.
I realize that I’m kinda hijacking the thread, but I would very much like to know.
LeifApril 27, 2010 at 10:10 pm #90344
Topher Sabot, EditorParticipant
In general rollerskis are mounted with the binding as far back as possible. Unless you are mounting for a very small foot, it is usually hard to get near the balance point. The skis are usually “tail heavy.” That is the nature of rollerskis generally.
So to answer your question, balance point is usually ignored on rollerskis.
I too would like to know about those German skis!April 30, 2010 at 2:02 am #90345
I don’t recall the brand of those German roller skis. I do remember the website was a “.de”, of course. I saw them at the World Masters Cup when they held in McCall, Idaho, three years ago, I think.
I had sort of mulled over a design like this myself, using a rubber bumper for the “grip wax”, but realized that when it contacted the road on an uneven patch it would probably trip you up, like icing klister. The German design solved this by using a ratcheted wheel in the middle, right near the boot toe, for the grip.
My concern about them besides how well they would work in the real world of uneven roads had to do with the rather small cross section of aluminum used for the shaft. Since it was designed to flex, to “set the wax” like a ski, I’m sure the aluminum would fatigue and fail eventually. Composite wold be a better choice from that aspect.
Still, I’d love to really test ’em out. . . .
RandyApril 30, 2010 at 2:59 pm #90346
Is this it? http://www.skirol.de/
I was a little put off by the double rear wheel, but I guess if they worked in the 70’s, there’s no reason they won’t work now.
Also, to answer the original question, something that I find helpful if you use nnn is to use the second bumper that comes with skate bindings.May 1, 2010 at 2:59 am #90347
Yup, those are the ones. I may be had to tell from the rear, but they are about the longest roller skis I’ve seen. As I recall, they seemed quite light and well balanced. I tried them without poles with no problems.
But, then, anything would seem light to me since I use Aero 150 CSs for classic roller skis.
RandyJune 7, 2010 at 11:17 pm #90348
Just an update.
I’ve been skiing quite a bit with the extra weight on the front of the skis.
I find it helped with stability enough to help me dial in my technique.
Now that I have my technique dialed in, I no longer require the balance weight.
In fact, it’s better without it.
It may be a very helpful aid for others getting used to rollerskis initially.July 15, 2014 at 12:25 pm #107169
NordicSpy: “Is the balance point important in rollerskis?”
Yes, it is, but it has been severely neglected the latest 20 years. I think classic roller skis for adults shouldn’t be much shorter than 80 centimeters and skate roller skis not much shorter than 68 centimeters thereby allowing balance point mounting of the bindings. I also think roller ski lengths should be adapted to the skier in an analogous way ski lengths are. Then advices such as Odd-Björn Hjelmeseth’s would not be needed: https://www.youtube.com/watch?v=aW6LS4tRaCk
You must be logged in to reply to this topic.