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Are all Hollowtech II bearing cups compatible with all Hollowtech II cranks?

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Are all Hollowtech II bearing cups compatible with all Hollowtech II cranks?

Old 08-11-15, 01:53 PM
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TheReal Houdini
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Are all Hollowtech II bearing cups compatible with all Hollowtech II cranks?

Or chainsets if you prefer.
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Old 08-11-15, 03:30 PM
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Yes.
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Old 08-11-15, 03:34 PM
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There are MTB and Road versions. But the MTB work across all MTB lines and the road work across all road lines.
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Old 08-11-15, 06:18 PM
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Yes, as long as the threading (English or Italian) matches your frame.
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Old 08-11-15, 07:29 PM
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Can someone please clarify the road vs MTB business? Can a road crank set be used with a MTB bottom bracket, or vice versa? I understand that the spindle diameter is the same, but what differs is the outer shell thickness, right?
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Old 08-11-15, 10:48 PM
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Originally Posted by agenkin View Post
Can someone please clarify the road vs MTB business? Can a road crank set be used with a MTB bottom bracket, or vice versa? I understand that the spindle diameter is the same, but what differs is the outer shell thickness, right?
Assuming we are talking about threaded BSA version Hollowtech BB's....

For BB: The only difference between road and MTB Hollowtech BB's are the inner dust shield between the two threaded cups. The MTB version is wider, since MTB's generally have wider BB shells (73mm). The MTB BB also includes three spacers (two driveside, one nondriveside) for narrow (68mm) shells. All 72mm shells use one spacer (driveside). You can interchange road and MTB Hollowtech BB's as long as you have the appropriate inner dust cover (just reuse your old one) and applicable shims (for MTB only).

For crankset: The real difference is the spindle length. The MTB cranksets have a wider spindle for wider BB shell. Rather than make different models for narrow and wide BB shells, they just shim the BB cups out on 68mm shells (cheaper/easier). To fit a MTB crank on a road bike (probably 68mm shell), you need to shim the BB.
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Old 08-12-15, 07:34 AM
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Thanks all.
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