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Französische Fahrräder: Unterschied zwischen den Versionen

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===Innenlager===
===Innenlager===
French-thread bottom bracket cups use 35 mm x 1mm threads. They are getting hard to find. If you have a French bicycle with sound bottom bracket cups, you may want to re-use them, even if you wind up changing the axle. Since French bottom brackets are normally the usual 68 mm width, British/I.S.O. bottom bracket axles will sometimes work.
Französische Innenlagerschalen haben ein Gewinde 35 mm x 1mm. Diese sind inzwischen sehr schwer aufzutreiben. Wenn man also ein französisches Fahrrad mit gesunden Innenkagerschalen findet, kann man sich entscheiden, diese weiterzuverwenden, selbst wenn man die Achse ändern möchte. Da französische Tretlagergehäuse im Allgemeinen 68 mm breit sind, kann man manchmal Innenlger nach britschem/ISO Standard verbauen.
 
Französische Innenlaerschalen haben meistens dünnere Wände als japansiche Innenlagerschalen. Dadurch sind die Pressrücken weiter auseinander. Wenn man eine japanische Standardwelle verbaut, kann die einstellbare Lagerschale sich nicht weit genug hineinschrauben lassen, dass die Lagerkugeln einpassen. Falls das dennoch klappt, ist die Lagerschale so weit eingeschraubt, dass der Konterring sich nicht mehr montieren lässt.
 


French bottom bracket cups usually have thinner walls than Japanese ones, so the bearing ridges on the spindles are farther apart. If you use a standard Japanese spindle, the adjustable cup won't be able to screw in far enough to snug up the bearings, or if it does, it will sink into the bottom bracket shell so that you won't be able to install the lockring.


The good news is that a Japanese spindle made for an Italian size (70 mm) bottom bracket will usually fit! In the J.I.S. marking system, these are the spindles that are marked with a "5" code. Spindles for 68 mm bbs have codes beginning with 3. This trick often makes it possible to upgrade an older bike from cottered to cotterless cranks, at a reasonable cost, or replace a worn French cotterless spindle that is no longer available -- but see warning below about French crank extractors.
The good news is that a Japanese spindle made for an Italian size (70 mm) bottom bracket will usually fit! In the J.I.S. marking system, these are the spindles that are marked with a "5" code. Spindles for 68 mm bbs have codes beginning with 3. This trick often makes it possible to upgrade an older bike from cottered to cotterless cranks, at a reasonable cost, or replace a worn French cotterless spindle that is no longer available -- but see warning below about French crank extractors.
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See the selection of French bottom brackets and parts at Harris Cyclery.
See the selection of French bottom brackets and parts at Harris Cyclery.
===Kurbelsplinte===
===Kurbelsplinte===
The usual cotter diameter for French cottered cranks is 9 mm, rather than the 9.5 mm more commonly used on British and Asian bicycles.
The usual cotter diameter for French cottered cranks is 9 mm, rather than the 9.5 mm more commonly used on British and Asian bicycles.
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