Spacer Size of the Wheel Hub

いつも通りに取り付けたのに、なぜか回りが悪いウィールが1個あったりする経験が誰にもあると思います。その原因はシャフトを絞めた時のベアリングの変形にあるのですが、そのベアリングを変形させたのは不適当なスペーサーを使った為です。ウィールに適したスペーサーの長さはハブの形状によるのですが、実測した写真がアップされました。アルミハブのように削れば精度が高くなると思いますが、樹脂素材のハブは金型プレスだからとしても、正直なところ、スペーサー部分のサイズが、こんなにもバラバラだったとは驚きです。もっとも、0.1mm以下の話なので一般的には問題にならない誤差かと思いますが、40km/hのスピードを出すなら無視できない数字です。回るベアリング以前に、もっとスペーサーに目を向けてもイイかも知れません。

Bont Bearing SpacerWheel Hub
Here are many photos measured the space for the bearing spacers. Although it was the same size when saying roughly, it was not the same size strictly.

GYRO MERCURY XG Pink 2007


10.28mm and 10.26mm

GYRO MERCURY Violet F1 2007


10.16mm and 10.03mm

STAR WHEEL Star Grip ST-W


10.145mm and 10.105mm

STAR WHEEL Star Grip STI-T


10.22mm and 10.10mm

HYPER Mach2


10.14mm and 10.09mm

OCRA


9.94mm and 10.04mm
Zeroboard: The photos which surveyed the wheel hubs
HYPER-RACE 2008: Answer wheels hub problem
Inline Skating Notebook: Alu-Spacer (Mar. 3, 2010)

Outdoor wheels: Atom 1 vs Bont Highrollers?

by andr_gin (Dec. 15th, 2009)
The spacer problem is only the indirect cause.
I have rain bearings that need 0.3mm larger spacers, so for standard wheels (my Matter F0 100mm or the Rollerblade standard wheels) I need a 10.5 instead of a 10.2. When I first put the 10.2mm spacers in the wheels were spinning perfect, but after tightening wheels they blocked.

When I bought the Bont G4 I had the same problem again, but I found no spacers that were longer than my extra long spacers with 10.5

I wanted to use the G4 so I had to apply much force to get the bearings in. I even had to use a hammer to get them in (only touch them softly, but more force than you would have normally. The wheels were I had to use the most force started cracking, so I think I am sure this was the cause. Alex told me in a thread here or at bont.com (sorry do not remind) that you should use a 10.35mm spacer while 10.2mm is standard.

If you have standard bearings and standard spacers with 10.2 you might run into the same problems like I did, so it will be better to buy a set of larger spacers if you get some. Spacers that are too small will not damage the wheel but you will need more force to get it in so that the wheels do not block. Alex said that this is the cause. He suggested using a bearing press, but unfortunately you cant get one for 110mm wheels in Austra/Germany. If you have a shop selling them please send me a message

So here are the combinations that I have tested:
  • Matter F0 100mm with HTB Magic with 10.2 spacers: No problem at all
  • Rollerblade standard bearings with rollerblade standard wheels and 10.2 spacers: No problem at all
  • Movemax rain bearings with Matter F0 100mm and 10.2 spacers: wheels block
  • Movemax rain bearings with Matter F0 100mm or Rollerblade standard wheels and 10.5 spacers: wheels only spin about 15s, but when skating they are fast
  • Movemax rain bearings with Bont G4 with 10.5 spacers: wheels block. With much force or soft use of a hammer you will get the bearings in: wheels only spin about 10-15s getting better after a few km. Skates are fast, but 2 wheels cracked after 1.000km
  • Rollerblade standard bearings with Bont G4 and 10.5 spacers: No problem at all
  • Rollerblade standard bearings with Bont G4 and 10.2 spacers: Wheels spin for about 5 seconds if I put the bearings without the hammer method. When skating they are not slower, but you are definitely on the safe side with a larger spacer.
If you buy the G4 make sure that you buy a bit larger spacers (Bont says 10.35mm instead of 10.2mm). I decided to only buy the 10.5 spacers again with a set of G4, but change my rain bearings because they are making troubles in any combination, but it is sure that the G4 are also involved.
SkateLog Forum: Outdoor wheels: Atom 1 vs Bont Highrollers?
zeroboard.com: Talk about a Bearing

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