Birkie News, Ski & Bike Tech Talk

Wax Report for Pre-Birkie

Weather Forecast:

Overnight low 19 below zero; late afternoon high 11 above. Race start is delayed until 11am so air temps will be warming into single digits above zero – expect some cold air in the frost pockets! Approximate start temp. 5 below zero.

Situation:

Cold, fresh snow; course has been moved to north of OO from Lake Hayward.
Kick Wax:
A winter of multiple rain evens means we’ve used a lot of klister; however, there is a lot of new snow from Wednesday and Thursday. Expect 6″ or more of fresh snow with the older, icy stuff piston-bullied and tilled in.
We recommend a very thin klister binder like Six KR20 or Rex Liquid Base Klister. Layer must be thin and shorter than the regular kick zone by about 3″ in front and 1 1/2″ in back. Allow to harden fully before applying kick wax.
Hard Wax:
one layer of Swix V40 Extra Blue, think and lightly cork to cover klister. The cover and go longer with Swix VR30. Make sure not to go too long or thick with the klister and V40. Cover with colder kicker and you’re good. Go long with the cover wax.
Other Options – Start Oslo, Rex pro Grip, Start Terva Green or Black. Binder is very important in this context.
Glide Wax:
Expect a generous helping of fresh powder; uphills should soften up during the race traffic. Some ice tilled in should increase speed on the flats and downhills.
Favorite glide waxes for cold: Swix LF4, Start Green, especially MF10, Rex HF 31, FastWax White, Vauhti Polar HF
Fluor Top coats of Rex Tk-73 or Tk-820 or Toko Jetstream Blue, Start SFR 75 will be possibilities due to mixed snow type.