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Series
SHIMANO
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Model no.
BB-ES300, BB-ES300-E, BB-ES300-K, BB-ES51
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Structure
Standard, E-type, For chain case
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Spindle
Hollow pipe, OCTALINK
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Axle length/shell width (mm)
107 (68 (BC1.37)), 70 (M36), 73 (BC1.37), MM110 (68 (BC1.37)), 70 (M36), 73 (BC1.37), LL113 (68 (BC1.37)), 70 (M36), 73 (BC1.37), 113 (68 (BC1.37), 70 (M36), 73 (BC1.37)), D-H (68 (BC1.37)), 70 (M36), YL117 (68 (BC1.37)), 117.5 (68 (BC1.37)), 118 (68 (BC1.37), 70 (M36), 73 (BC1.37)), XL118 (68 (BC1.37)), 70 (M36), 73 mm, 121 (68 (BC1.37), 70 (M36), 73 (BC1.37)), 126 (68 (BC1.37), 70 (M36), 73 (BC1.37)), D-NL 122 (68 (BC1.37), 70 (M36), 73 (BC1.37)), D-EL 127 (68 (BC1.37), 70 (M36), 73 (BC1.37)), LL123 (68 (BC1.37), 70 (M36), 73 (BC1.37)), 123SP (68 (BC1.37)), 130 (68 (BC1.37))
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Spindle Material
Steel
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Spindle Finish
Bonderlube, Plated
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Left hand adapter Material
Resin
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Right hand adapter/shell Material
Steel
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Right hand adapter/shell Finish
Phosphate coated, Nickel Chrome
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Note
w/ 0.7 mm spacer
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Model no.
BB-ES51-E, BB-ES51-K, BB-ES51-AK, BB-UN300
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Spindle
Hollow pipe, OCTALINK, Square type
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Axle length/shell width (mm)
107 (68 (BC1.37)), 70 (M36), 73 (BC1.37), MM110 (68 (BC1.37)), 70 (M36), 73 (BC1.37), LL113 (68 (BC1.37)), 70 (M36), 73 (BC1.37), 113 (68 (BC1.37)), 70 (M36), 73 (BC1.37), D-H (68 (BC1.37)), 70 (M36), YL117 (68 (BC1.37)), 117.5 (68 (BC1.37)), 118 (68 (BC1.37)), 70 (M36), 73 (BC1.37), XL118 (68 (BC1.37)), 70 (M36), 73 mm, 121 (68 (BC1.37)), 70 (M36), 73 (BC1.37), 126 (68 (BC1.37)), 70 (M36), 73 (BC1.37), D-NL 122 (68 (BC1.37), 70 (M36), 73 (BC1.37)), D-EL 127 (68 (BC1.37), 70 (M36), 73 (BC1.37)), LL123 (68 (BC1.37)), 70 (M36), 73 (BC1.37), 123SP (68 (BC1.37)), 130 (68 (BC1.37))
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Spindle Finish
Painted (black), Bonderlube
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Left hand adapter Material
Resin, Aluminum
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Right hand adapter/shell Material
Steel, Aluminum/Steel
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Right hand adapter/shell Finish
Nickel Chrome
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Note
For FC-M521 only
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Model no.
BB-UN300-K, BB-UN300-E, BB-UN101, BB-UN101-K
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Spindle
Square type
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Axle length/shell width (mm)
107 (68 (BC1.37)), MM110 (68 (BC1.37)), 70 (M36), 73 (BC1.37), LL113 (68 (BC1.37)), 73 (BC1.37), 113 (68 (BC1.37)), 70 (M36), 73 (BC1.37), D-H (68 (BC1.37)), YL117 (68 (BC1.37)), 117.5 (68 (BC1.37)), 118 (68 (BC1.37)), 70 (M36), 73 (BC1.37), XL118 (68 (BC1.37)), 70 (M36), 73 mm, 121 (68 (BC1.37)), 70 (M36), 73 (BC1.37), 126 (68 (BC1.37)), 70 (M36), 73 (BC1.37), D-NL 122 (68 (BC1.37)), 73 (BC1.37), D-EL 127 (68 (BC1.37)), 73 (BC1.37), LL123 (68 (BC1.37)), 70 (M36), 73 (BC1.37), 123SP (68 (BC1.37)), 130 (68 (BC1.37))
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Spindle Finish
Bonderlube
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Left hand adapter Material
Aluminum, Resin
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Right hand adapter/shell Material
Aluminum/Steel, Resin/Steel
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Note
w/ Crank arm fixing screws spec. is available, w/ 0.7 mm spacer