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張貼者: Gordon (國棟)
張貼時間: 2011/01/30
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回應者: Kevin
回應時間: 2011/01/30
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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.
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.
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回應者: Kevin
回應時間: 2011/01/30
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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..
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回應者: aj
回應時間: 2011/01/30
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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.
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回應者: mark
回應時間: 2011/01/30
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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?
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回應者: 老K
回應時間: 2011/01/30
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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...
另外如果Gordon需要我幫忙,它會找我的,我也很樂意...
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回應者: Kevin
回應時間: 2011/01/30
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how about you stay on topic and help gordon out a little bit?引用 老K 的文章-AJ是非常用心騎車的年輕人
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回應者: FrankYueh
回應時間: 2011/01/30
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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?
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回應者: mark
回應時間: 2011/01/31
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"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?
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?
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回應者: 老K
回應時間: 2011/01/31
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攀岩車許多規格品都是由創意改裝進而量產的成果,所以或許要不了多久這BB就會量產。引用 mark 的文章-"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...
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回應者: mark
回應時間: 2011/01/31
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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.
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回應者: 老K
回應時間: 2011/01/31
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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...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...
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回應者: Gordon (國棟)
回應時間: 2011/01/31
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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.
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.
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回應者: 老K
回應時間: 2011/01/31
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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.
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.
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回應者: 老K
回應時間: 2011/01/31
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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.
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.
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回應者: mark
回應時間: 2011/01/31
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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.
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.