Difference between revisions of "Installing HollowTech II Bottom Brackets"
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Please excuse the dirt nd filth on the parts in this discussion. I was in a ghetto mood, but the result of the work was clean enough for great results. | Please excuse the dirt nd filth on the parts in this discussion. I was in a ghetto mood, but the result of the work was clean enough for great results. | ||
| + | Measuring the bottom bracket shows that it is well made and will install perfectly for a bottom bracket shell width of just over 68mm with 2x 2.5mm shims.<br> | ||
[[Image:Hollowtech-II-1.jpg]]<br><br> | [[Image:Hollowtech-II-1.jpg]]<br><br> | ||
| − | + | ||
| + | The two shims. They will be mounted on each side of the bottom bracket shell to space the pedals evenly and attain the final chain line, 50mm.<br> | ||
[[Image:Hollowtech-II-2.jpg]]<br><br> | [[Image:Hollowtech-II-2.jpg]]<br><br> | ||
| − | The | + | |
| + | The bottom bracket shell is 67mm, 1mm short of optimum 68mm. This is a result of the amount of matirial necessaryly removed to properly face the shell.<br> | ||
[[Image:Hollowtech-II-3.jpg]]<br><br> | [[Image:Hollowtech-II-3.jpg]]<br><br> | ||
| + | |||
A 1mm shim needed to be installed on the drive side to correct for the short bottom bracket shell. | A 1mm shim needed to be installed on the drive side to correct for the short bottom bracket shell. | ||
[[Image:Hollowtech-II-4.jpg]]<br><br> | [[Image:Hollowtech-II-4.jpg]]<br><br> | ||
| + | |||
| + | Just 1 2.5mm shim on the non-drive side.<br> | ||
[[Image:Hollowtech-II-5.jpg]]<br><br> | [[Image:Hollowtech-II-5.jpg]]<br><br> | ||
| + | |||
| + | The crank installed with proper bb spacing, chainline, and pedals centered.<br> | ||
[[Image:Hollowtech-II-6.jpg]]<br><br> | [[Image:Hollowtech-II-6.jpg]]<br><br> | ||
[[category:bicycle]] | [[category:bicycle]] | ||
[[category:drivetrain (Bicycle)]] | [[category:drivetrain (Bicycle)]] | ||
Revision as of 01:19, 16 January 2007
Please excuse the dirt nd filth on the parts in this discussion. I was in a ghetto mood, but the result of the work was clean enough for great results.
Measuring the bottom bracket shows that it is well made and will install perfectly for a bottom bracket shell width of just over 68mm with 2x 2.5mm shims.
The two shims. They will be mounted on each side of the bottom bracket shell to space the pedals evenly and attain the final chain line, 50mm.
The bottom bracket shell is 67mm, 1mm short of optimum 68mm. This is a result of the amount of matirial necessaryly removed to properly face the shell.
A 1mm shim needed to be installed on the drive side to correct for the short bottom bracket shell.
Just 1 2.5mm shim on the non-drive side.
The crank installed with proper bb spacing, chainline, and pedals centered.
