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There' a lot of information you can google about ROH and Profile's. They go hand in hand. Changing ROH without considering a profile will not yield a whole lot of results. This article explains it pretty well.
Formula from the ProSharp Europe
in KG (do the conversation to lbs.)
radius of hollow you can use this formula:
bodyweight/3,14 (Pi). 1 KG = 2.2 lbs so divide the weight of the skater by 2.2. Round the number to nearest 1/16 of and inch. 176.33lb/2.2 = 80.15/3.14 = 25.52mm. Convert 25mm x .039 = 9.95 or 1 inch. So the answer base upon the European's is 1 inch ROH for a player that weights 175 lbs. I can tell you after sharpening 5000 pair of skates, I haven't had one US player ask for a 1 inch ROH unless it was a goalie. But I don't sharpen PRO skates either.
If he doesn't know how to use his edges, profile is just a waste.
I have 4 rings at home and I'll make all of them common denominator for ease.
3/4 = 12/16
5/8 = 10/16
1/2 = 8/16
3/8 = 6/16
The closer to 16/16 (1”) the closer the hollow is to a goalie cut.
My goalie gets 10/16 and 12/16.
My 09 5'3" 125# uses 8/16" in the summer or on soft ice. On winter or hard ice he might go to a 6/16". But that's only if he's expecting to be unusually aggressive, with a lot of cutbacks. So, depends on ice and skating style/competition. But, while he's a good skater and is often commended "for his edges", his skating coach doesn't think so and tells him to just stick with the 1/2". Keep the edges clean, learn to use them. As a previous poster said, the difference between 9/16" and 8/16" is negligible. A lot of it is psychological.
Anybody use the flat bottom v; what’s the experience been?
I think the Flying V is the way to go.
If you're cutting a goalie skate more than 1/2 welcome to 2021 and go back to 50+ mens league or town hockey. Whoops can't say that anymore! Goalies are all lateral movement now. Lateral movement and strong pushes need sharp cuts. I go 7/16 and will go to 3/8 once my guy eats something and it actually sticks to him. Why do goalies need glide? Triple lindys inbetween periods?
If your player is still on 1/2 to 9/16 he’s a bender. Go back to town.
why do small dick dads find this insult "go back to town hockey" so satisfying. Sad lives
It’s true though. Unless your kid is a mite or a tiny squirt, he/she shouldn’t be skating on 1/2 inch. You’re doing the kid more harm then good. It’s like keeping training wheels on a bicycle and asking your kid to go compete in a bike race.
You could not be more wrong here. Bergeron is well over 1" for his sharpening. In fact, the person on the Bruins with the deepest hollow is Marchand at 5/8". At least do your research before you start to type things.
Yeah, he has a reason to lie about his hollow? Now your connected to the sharpener of the Bs and come on here to brag lol. 1/2 or 5/8ths is most common and that was the discussion. There is a reason for that if you ever skated. 1"s and 3/8ths etc are outliers. Keep your Fed stud on 1" as he does figure 8's and can't cut back. But, you can say he has the same edges as Bergeron to your fellow tool bag Dads. No super dad here, just one who has a clue.
list of penguins profiles from a number of years ago...
My kid plays on a very solid to high end 07 team. I’d say barely any of the kids on his team skate on a 1/2”. Most are 3/4” or 3/8 , 1/2’s are for the kids who bring their skates to pure hockey for a sharpening.
I’m sure your duster is still skating stock steel as well.