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Hi I’ve had 3or 4 vintage frames converted to SS with 126 rear dropouts and chainline has never been an issue, these frames have had the more horizontal dropouts as you’ve described
I’ve only been using freewheel so again no issues of wheels dropping out
good luck -
From my understanding, chain line will be the same on any frame as the centre of the seat tube, bb, wheel etc is the same and it's just the chain/seat stay that is wider from the centre. Best I could describe it! Sorry if it's bad.
Adding spacers shouldn't affect that alignment.
As for the drop outs giving enough space to tension the chain, I have minimal experience in that, sorry.
littleK
3c70
@LeslieLamLam
Hi all
I am currently intending to buy a bike frame so I can build up a bike myself (a single speed/fixed gear with a flip flop hub as a little project) to increase my bicycle knowledge. I ride a 55" to 57" depending on the frame and have been reading Sheldon Brown for a while now. I have a work stand and a range of tools (mainly.park) to build up a bike. However, I haven't tried building up a bike completely from the frame up.
For simplicity of build, do you think that I should choose a frame (track) to that has 120mm OLD so it fits most flip flop hub dims? Or a vintage road frame (may have 126 or 130mm OLD) AND then add spacers...not sure if this would be difficult to get a good chainline for a novice like me.. .
I have noticed that rear drop outs for some vintage road frames are at a slight horizontal angle ... more so than others, will this mean it will be harder to achieve a desirable chain tension?
Would love to hear all your opinions and advice…!