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Miche Primato Advanced Crankset

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Miche Primato Advanced Crankset

Old 12-01-14, 05:01 PM
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mrblue
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Miche Primato Advanced Crankset

I just purchased, online (haven't received it yet), a Miche Primato Advanced crankset for my fixed gear bike. Going by the pics it looks like it has self-extracting crank bolts. I have never installed a crankset with self extracting bolts. Having said that, do the crank bolts install like any other crankset and square-taper BB combo? So can I just tighten up the bolts and be done, or is there anything else I have to do in regard to the self-extracting mechanism?


Thanks.

Last edited by mrblue; 12-01-14 at 05:38 PM.
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Old 12-01-14, 05:24 PM
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The bolts are 100% the same when tightening. The only difference is that "dust cap" is pre-installed, and the bolt removes the crank when backed against it.

To prevent issues down the road, try to pack the area between the bolt's flange and dust cap with grease, partly so water and dirt can't get in there and so that when time comes to remove the crank, you won't be fighting dry friction between the bolt flange and extractor ring ("dust cap").
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Old 12-01-14, 05:29 PM
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Originally Posted by mrblue View Post
. . . So can I just tighten up the bolts and be done, or is there anything else I have to do . . .
Use the recommended torque value.
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Old 12-01-14, 05:35 PM
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Originally Posted by AnkleWork View Post
Use the recommended torque value.
Thanks! I'll get to try out the new torque wrench, too.
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Old 12-01-14, 05:42 PM
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Originally Posted by FBinNY View Post
The bolts are 100% the same when tightening. The only difference is that "dust cap" is pre-installed, and the bolt removes the crank when backed against it.

To prevent issues down the road, try to pack the area between the bolt's flange and dust cap with grease, partly so water and dirt can't get in there and so that when time comes to remove the crank, you won't be fighting dry friction between the bolt flange and extractor ring ("dust cap").
Thanks! When I removed a crankset (FSA Omega) that had a self-extracting bolt, the bolt turned easily, for one or two turns, then it got super hard and wouldn't budge. I actually had to use a breaker bar to get it to move, then after another turn or two it was easy again. Should I anticipate the same issue while installing?
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Old 12-01-14, 05:46 PM
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Originally Posted by mrblue View Post
Thanks! When I removed a crankset (FSA Omega) that had a self-extracting bolt, the bolt turned easily, for one or two turns, then it got super hard and wouldn't budge. I actually had to use a breaker bar to get it to move, then after another turn or two it was easy again. Should I anticipate the same issue while installing?
No, the loose/tight/loose you experienced during crank removal results from the fixing bolt first loosening itself, then butting up against the dust cap and pushing against it to pull the crank and them getting easy as the crank came off. Tightening is just a single operation as the bolt threads in and tightens the crank in place.
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Old 12-02-14, 08:34 AM
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I have had the self extractor- ring push the threads in the crankarm out. and the crank arm never budged.
this was a square taper type.

Forewarned I'd get a Shimano type single piece bolt and a big long 8 mm hex wrench

or a flat washer and a 14 mm Head bolt and a thin wall socket for your ratchet or breaker bar.

Last edited by fietsbob; 12-02-14 at 08:39 AM.
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