That bolt is for adjusting the dropouts. This bike could be run singles, Speed if you’d like, and the bolt would be used to keep the quick release from slipping backwards. You could also use it to adjust your wheelbase moving the wheel backwards will give a slightly more stable feel.
Realistic-Might4985 on
They are called micro adjusters. At least that is what we called them in the 80’s.
cdlbadger on
You could also use a Surly Hurdy Gurdy if you can’t find a set screw. It’s a lot more robust and less likely to break.
rocourteau on
Dropout adjuster screw, as others indicated. Common on old high-end steel frames (like 70’s and 80’s). Usually one on each side, used to adjust rear wheel side-to-side alignment, so you could throw in your wheel after a flat repair or wheel replace, knowing it would be straight.
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Dropout adjuster set screw? https://www.ebay.com/itm/184696593219
That bolt is for adjusting the dropouts. This bike could be run singles, Speed if you’d like, and the bolt would be used to keep the quick release from slipping backwards. You could also use it to adjust your wheelbase moving the wheel backwards will give a slightly more stable feel.
They are called micro adjusters. At least that is what we called them in the 80’s.
You could also use a Surly Hurdy Gurdy if you can’t find a set screw. It’s a lot more robust and less likely to break.
Dropout adjuster screw, as others indicated. Common on old high-end steel frames (like 70’s and 80’s). Usually one on each side, used to adjust rear wheel side-to-side alignment, so you could throw in your wheel after a flat repair or wheel replace, knowing it would be straight.