登山車:XTR是頂級競賽級,Deore XT是頂級訓練級,Deore LX是 專業訓練級,Deore是專業入門級,ALIVIO是頂級娛樂級,Acera和ALTUS都是娛樂級,TOURNEY算是入門娛樂級。Deore是個分水嶺,Deore(含)以上都可以稱為專業級。
公路車:DURA-ACE是頂級競賽級,Ultegra稱為專業訓練級,105是專業入門級,TIAGRA是業餘級別,SORA是娛樂級,2200算是入門娛樂級。 這其中105是個分水嶺,105(含)以上都可稱之為專業級。
以下這是上Shimano網站所查到的規格:
後變
Model Number RD-M971-SGS
Series XTR
Shifting Action Top Normal
Mount Type Drop-out
Maximum Sprocket 34T 變
Minimum Sprocket 11T
Front Difference 22T maximum
Total Capacity 43T
Guide Pulley sealed bearing
Tension Pulley sealed bearing
Pulley Bolts stainless steel
Pulley Bolts Retainer yes
Bracket Body cold forged aluminum/color anodized
Bracket Pivot Seal double O-rings
Plate Body cold forged aluminum/color anodized
Plate Pivot Bolt aluminum
Plate Pivot Seal single O-ring
Outer Link cold forged aluminum/anodized
Inner Link cold forged aluminum/anodized
Link Pin Bushings fluorine coated (4)
Outer Plate aluminum/anodized
Inner Plate aluminum/anodized
Average Weight 199g
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前變
Model Number FD-5600-F
Series 105
Cassette Compatibility 10-speed
Top Gear Teeth 50-56T
Maximum Capacity 16T
Link Bushing -
Spring Cover yes
Chain Stay Angle 61-66
Mounting brazed-on
Chain Line 43.5mm
Band Mount -
Band Material aluminum/clear coated
Outer Link aluminum/clear coated
Inner Link aluminum/clear coated
Chain Guide steel/chrome plated
Average Weight 95g (FD-5600-F)
齒容 = (前最大盤齒盤的齒數-前最小盤齒盤的齒數)+(後飛輪最大齒數-飛輪最小齒數)
齒差 = 前最大盤齒盤的齒數-前最小盤齒盤的齒數
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大盤若選53/39T,飛輪若選11~32T
齒容 = (53T-39T)+(32T-11T) = 14T + 21T = 35T < Total Capacity 43T
齒差 = 53T- 39T = 14T < Front Difference 22T maximum
小弟這樣算,對嗎?
還可以上到10速?




























































































