Hay can anyone tell me how to fix this?

http://www.youtube.com/watch?v=lNC8SX9CuZU  喜歡(1)+ 展開- 隱藏

What's the dimensions of the worldcat bb? Is this an ISIS or a square tapered setup? you may need a spacer between the frame and the drive side bb cup. The non drive side shell is sticking out a lot more than it should though...

There's a couple of possibilities here :
1. The spindle is not a 128mm. However, with the proper freewheel/crank setup, even a 122mm should clear
2. The shell width is 73mm, and you need a spacer between the frame and the bb cup to space it correctly. However, the spindle offset from the cup is a fixed measurement, and this shouldn't play a factor on the clearance of your freewheel
3. The cranks and/or the spindle spacers are damaged. This would mean that your cranks are sliding towards the shell more than it should

I think it's best to see what old K has to say about it as well. He should know more about the bb dimensions than us.

If you have the correct tools, could you remove the bb and take a picture? Perhaps the bearings are not being pressed in all the way, which would mean that the spindle doesn't stick out of the drive side shell enough..

this is the first outboard bearing in the market on a trialbike, stiffness on the rear end,and the ultimate power transfer...etc.....i think.

登山車與公路車的外掛式BB都需要同一系統的大齒盤曲柄組, 攀岩車用的前飛輪及曲柄是如何與外掛式BB結合呢?

AJ是非常用心騎車的年輕人(這是回答Mark的問題,沒別的意思)
另外如果Gordon需要我幫忙,它會找我的,我也很樂意...

引用 老K 的文章-

AJ是非常用心騎車的年輕人

how about you stay on topic and help gordon out a little bit?

引用 Kevin 的文章-

how about you stay on topic and help gordon out a little ...

someone will contact him privately... the forum is use to commercial, dont you remember?

"AJ是非常用心騎車的年輕人(這是回答Mark的問題,沒別的意思)"

這樣應該是說, 那是AJ自行改裝的外掛式攀岩車BB, 並非市售品囉?

不知道國棟那為什麼會過短，是BB選用太短，還是缺墊片，或者是有可能BB安裝沒裝好？

攀岩車因為規格沒有統一, 有時不同牌的曲柄與護盤組合會造成這種擠壓卡到的結果, 以這個CASE來說, 可以試試較薄的護盤.

引用 mark 的文章-

攀岩車因為規格沒有統一, 有時不同牌的曲柄與護盤組合會造成這種擠壓卡到的結果, 以這個CASE來說, 可以試試較薄...

熱心的猜測終究不能真正解決問題!!不過沒有車騎一定很難過...祝福Gordon一切順利...

well after much observation i finally found out what the root of the problem is. it was very stainge at first because i never had any problems with this BB, and i used it for a long time since in taiwan, so i know its the right one because 老K gave it to me (128mm for bike trial).



well the problem is that i tighten the bolt too tight every time i take off and put on the chank, thus the metal of BB shaft is pushed back allowing the feer wheel and crank to go in too much.





so thats why the BB and free wheel was rubbing.








so i guess i will have to get a new BB or remove the bash ring just to some clearance.

果然!!任意猜測對問題沒有幫助...真相大白!!
省錢方法-換spacer,徹底解決方法-換支新的。
Hi Gordon, how can I help you?? or, mail me please.

這種情形我以前有處理過, 如果護盤換薄一點飛輪就不會撞到BB, 若是小車就是換薄的飛輪墊片.

失之毫釐差之千里!!從前我還在OE場當業務時遇過一件義大利客戶退貨索賠事件：座管口徑只差大約8條也就是0.08mm,大約一根頭髮的粗細!!真是應驗這句話;那一次工廠虧了大約200萬台幣!!

從大黑的相片看來可以討論幾件事:1)ISIS曲柄螺絲到底該鎖多大扭力??2)ISIS軸心到底有幾種規格??該如何留心與搭配??

大黑的BB可能再也無法鎖緊曲柄了;除非換spacer,軸心上金黃色的已經變型那一段。不然接下來如果只換薄的護盤,短時間內即使鎖緊曲柄因為沒有那spacer來頂住曲柄,大概撐不了多久會再鬆掉!!然後曲柄ISIS牙跟著壞掉,越花越大條!!!

玩車其實不僅僅是騎乘技術,如果可以從玩樂當中得到些機械常識,應該可以讓參與運動的樂趣更多元。
徹底瞭解各項規格也才不會有誤認為""便宜""就好的觀念。還是要重申宣揚台灣加工精度世界一流,請多愛用國貨。當然許多外國廠牌也是made in Taiwan.

螺絲應該鎖多緊? 一般人在鎖螺絲的時候常常都是用自己最大的力量去鎖, 等到鎖崩牙的時候才知道要適可而止, 但人的力量有大有小, 怎麼說都沒一個準, 實際上, 螺絲鎖過度用力有時雖然沒崩牙還是有可能造成如規格變形那樣的傷害, 因此要準確最好就是使用扭力板手, 並根據產品的廠方規格鎖到正確的緊度.

以BB的曲柄螺絲來說, 在我的資料上的鎖緊扭力是609-695 INCH-POUNDS, 換算成扭力板手常用的規格是69-79 牛頓/米, 這只是指一般而言, 有時候因為品牌規格還會有不同, 像我在安裝SHIMANO曲柄時, 上面有的就會附上扭力規格的說明, 那就最標準了.

根據我使用扭力板手的經驗, 一般人用估計的力量鎖螺絲都會鎖太緊, 可是沒有專用的扭力板手及扭力數據實在也沒辦法, 太緊了會有問題, 太鬆了又會鬆掉.

因此,該相信有工具的人或是專業的腳踏車店。最不能相信的就是""自己的感覺""....

哇喔！

凱文說的沒錯，三種可能的第三個就是國棟面臨的問題。因為沒有拆下來，凱文建議國棟將它拆下來一看究竟。也果然，拆下來就知道問題所在。

這是很好的主題，凱文和Mark也做了很棒的建議。

在版上大家相互交流，並且交換自己所想的意見就是好事。如果每個人解決問題都私下Mail聯絡，或是問題解決不了開始離題，這樣不只是問題無法解決，大家也學不到解決問題的精神和方法，更沒有辦法知道大家在想什麼。這就是BTT論壇無私的精神，該分享的東西不應該有所私藏和保留才對。