|
S k a t e L o g F o r u m
Inline Skating and Quad Roller Skating Forum Hosts: Jessica Wright | Kathie Fry |
FOLLOW US: Our Blog | Facebook | Twitter | Email |
|
|
Home
-
Forum Index
-
Africa Skating
-
Asia Skating
-
Europe Skating
-
Oceania Skating
-
Pan America Skating
-
Roller_Rinks
-
![]() ![]() |
Forum Administrators: Jessica Wright and Kathie Fry | Email Us Access code for buying and selling subforums: "skates" How To Get a User Account and Posting Privileges in the SkateLog Forum Use Google to Search the SkateLog Forum |
|
Speed Skating Forum Most of the discussions in this forum will be about inline speed skating but discussions about ice speed skating and quad roller speed skating are also welcome. |
![]() |
|
Thread Tools | Display Modes |
![]() |
#1 |
Senior Member
Join Date: May 2012
Location: Amsterdam
Posts: 153
|
![]()
A year ago I bought a pair of Doop skates (https://doopshop.com/). Skates that attach to normal shoes. Sometimes it is nice if you don't have carry a pair of shoes, but can just take off your skates.
You can buy them different types of frames and I got them with a 3x110 setup. Big wheels roll better and normally I am on 4x110. And I didn't yet have a 3x110 frame. Unfortunately, from the start they were very unstable on rough surface. They are perfectly fine on smooth tarmac. But horrible on rough tarmac or brick roads. I assumed that the concept was just a bad idea and planned to mount the frames on normal speed skating boots. Last Friday put them on my old Fila F100 boots and went to the Amsterdam Friday Night skate. It was a disaster. I could easily keep up on smooth tarmac, but I could barely skate on brick roads, etc. Way worse even then when I used them in the original doop skate configuration. I have used a Cado Motus 4x110 frame on those Fila boots for years. So I was really surprised that 3x110 would be so extremely unstable. Looking at the frames I assumed the difference was due to deck height. But when I measured both frames, the Cado Motus frame measures 105 mm at the front and 115 mm at the rear (give or take a mm, I can't measure that accurately). The doop frame measures 110mm at the front and 120mm at the rear. So the difference is roughtly 5mm. It that really what is causing the instability or is something else going on? |
![]() |
![]() |
![]() |
#2 |
Member
Join Date: Jul 2016
Location: Saint Petersburg, Russia
Posts: 31
|
![]()
Length.
3-wheel frames may be short (FSK/speed slalom/etc) and long (speed skating). Your frame is < 10 inch long and has length equal to 4x80mm frame. So it's maneuverable ![]() |
![]() |
![]() |
![]() |
#3 |
Senior Member
Join Date: May 2012
Location: Amsterdam
Posts: 153
|
![]()
Does length make such a big difference? Both 4x110 and 4x90 are perfectly fine. Of course, the 4x110 is way better on rough surface, but 4x90 is quite usable as well. The 3x110 is indeed shorter than my 4x90, but would that make such a huge difference?
|
![]() |
![]() |
![]() |
#4 |
Major Trouble
Join Date: Aug 2010
Location: Cedar Rapids, Iowa
Posts: 1,651
|
![]()
a large part of the smoothness or roughness depends on how many simultaneous points of contact with pavement surface you can have at any one instant of time. The more points the smoother the feel. Think of just one wheel... it has to follow each and every rise and dip. Two wheels are about the same as the front wheel rises and falls with every contour and so does the rear wheel. When you get to three wheels some smoothing happens because it is highly unlikely that all three wheels will encounter the same rise/fall at the same instant. When you have 4 or 5 wheels they can never go down into the deepest dips and so the ride is smoother and the front/back rocking motion that you'd have on a 2 wheel setup is minimized.
edit: wheel size also plays a significant role in smoothness. A small wheel can fall deeply into dips when a very large wheel will simply bridge over the dip. So... long frame is not "directly" related to smooth but seems to be because more wheels and bigger wheels drive a longer frame. or maybe not! I'm open to rebuttal discussion!
__________________
Quando omni flunkus, moritati Last edited by bjvircks; June 26th, 2017 at 11:02 PM. Reason: expanding on a couple of points. |
![]() |
![]() |
![]() |
#5 |
Junior Member
Join Date: Nov 2016
Location: Utrecht, The Netherlands
Posts: 15
|
![]()
Maybe also the type of 110mm wheels you used?
|
![]() |
![]() |
![]() |
#6 |
Major Trouble
Join Date: Aug 2010
Location: Cedar Rapids, Iowa
Posts: 1,651
|
![]()
yes... I felt that the wheel softness aspect was in the 'it goes without saying' category.
__________________
Quando omni flunkus, moritati |
![]() |
![]() |
![]() |
#7 |
Senior Member
Join Date: Jun 2013
Location: London
Posts: 1,098
|
![]()
What sort of shoe are you wearing? If it has a soft sole that could allow the doop part of your setup to wobble no matter how rigidly you hold your foot. And if the wheels are wobbling enough to get further on their edges while you are trying to skate a straight line, I could see that causing problems.
Sketchers has a few lines of shoes that have thin soles. Or you could go the Vibram Five Finger shoes route. Maybe a good first step would be dress up shoes, which tend to have less cushioning than cross trainers.
__________________
You don't improve by training until it hurts; you improve by training after it hurts. I love the phrase "I quit". It beats more of my opponents than I do. |
![]() |
![]() |
![]() |
#8 |
Senior Member
Join Date: Oct 2007
Location: Illinois
Posts: 3,126
|
![]()
I have never liked 3 wheels setups of any kind on rough surfaces including 3x125. I use a 5x80 frame for my 3x125 setup. On a rough surface, I would much rather have the 5x80 instead of the 3x125. Just like bjvircks, fewer wheels equals rougher ride and a bigger chance for the wheels to take wicked detours on the edges of bricks or cracks in the road. Think of it this way, 3 wheels setups are essentially teeter totters that pivot about the middle wheel. If your skates are only touching the ground on the middle wheel while going over a bump, then it doesn't take much force to make your skate spin around by pivoting about that 2nd wheel.
|
![]() |
![]() |
![]() |
#9 | ||
Senior Member
Join Date: May 2012
Location: Amsterdam
Posts: 153
|
![]() Quote:
I used the wheels that came with the Doop skates. Not great wheels, but they roll well enough. Quote:
That should rule out the number of wheels or any wheel differences. |
||
![]() |
![]() |
![]() |
#10 |
Junior Member
Join Date: Nov 2016
Location: Utrecht, The Netherlands
Posts: 15
|
![]()
Recently I did a small test. Went to my favorite stretch of rough road and put different wheels under my left and my right skate. I compared Bont G3 84a, K2 Star Grip 85a, Bont Mayhem 85a and 87a and Bont Red Magic XFirm wheels. Was I in for a surprise, the differences where remarkable. For example I thought G3's where reasonable. But compared to these other wheels they really sucked. I binned them as soon as I came home.. What's in a wheel? It can be quite a lot.
|
![]() |
![]() |
![]() |
#11 | |
Senior Member
Join Date: Mar 2014
Posts: 139
|
![]() Quote:
|
|
![]() |
![]() |
![]() |
#12 | |
Senior Member
Join Date: Mar 2014
Posts: 139
|
![]() Quote:
So, I have been wondering if the 3X setup would be less prone to pivot and more stable if the wheel layout would be OO--O rather than the status quo O-O-O setup? The OO--O wheel setup could also allow for a slightly lower deck height. I haven't thought out the drawbacks of OO--O wheel orientation. Any ideas? |
|
![]() |
![]() |
![]() |
#13 | |
Senior Member
Join Date: Oct 2007
Location: Illinois
Posts: 3,126
|
![]() Quote:
|
|
![]() |
![]() |
![]() |
#14 |
Senior Member
Join Date: Oct 2007
Location: Illinois
Posts: 3,126
|
![]()
Onyourleft, I assume you mean something like this that I drew up for my wife in order to get a lower deck height and a shorter frame.
Non Equal Spacing 3x125 |
![]() |
![]() |
![]() |
#15 | |
Senior Member
Join Date: Mar 2014
Posts: 139
|
![]() Quote:
Only I had in mind doing so in 12.4", 12.6" and 12.8" length. |
|
![]() |
![]() |
![]() |
#16 |
Senior Member
Join Date: Oct 2007
Location: Illinois
Posts: 3,126
|
![]()
Ya, this drawing was for my 5'1" wife in an attempt to make 125's work for her (which they don't). Longer frames could take advantage of the offset middle wheel for lower deck heights and possible stability improvements.
|
![]() |
![]() |
![]() |
#17 | |
Senior Member
Join Date: Mar 2014
Posts: 139
|
![]() Quote:
"Carbon Frame H3 2x125 + 110 mm The only 2x125+110 frames in the world." "With its very low weight and height, it provides an incredible feeling while skating." "Length :12,6" Weight : 140 g Front-Deck Height : 44mm Mounting space : 195 mm and 165mm" |
|
![]() |
![]() |
![]() |
#18 | |
Senior Member
Join Date: Oct 2007
Location: Illinois
Posts: 3,126
|
![]() Quote:
![]() |
|
![]() |
![]() |
![]() |
#19 |
Senior Member
Join Date: Oct 2007
Location: Illinois
Posts: 3,126
|
![]()
Almost forgot to mention, she skates on a short 4x100, 12.0". A 12.6" with 125's hanging off the ends it quite a bit longer.
|
![]() |
![]() |
![]() |
#20 |
Senior Member
Join Date: Mar 2014
Posts: 139
|
![]()
^completly understandable.
|
![]() |
![]() |
![]() |
Thread Tools | |
Display Modes | |
|
|