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Old 02-16-15, 10:32 PM
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FBinNY 
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Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,504

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

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The key to confirming alignment is to establish the central plane and confirm that the saddle, wheels and steering axis all sit in it. This us usually and most reliably done by bolting the frame parallel to a table and measuring to all key points, while confirming that the axles are perpendicular and correctly centered.

I don't know where you live, but if there's a local builder with frame table, that's where to go. Sorry, but a photo simply doesn't cut it.

BTW- if all you want is to confirm that you don't need to cant the bike to either side when riding, you can do that with a square and bubble level but you need to be patient and make many observations over time because the bike moves under you. If the bike is off you'll see a pattern of readings off to one side more than to the other.
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