MyNameIsEarl
Well-Known Member
Hi Leslie, I recently built my first fixed gear from an old late 80's steel framed bike I had. The O.L.D. (see below) was 126mm and the new track wheel I bought was 120mm. I just used a couple of 2mm spacers either side of the hub, so I didn't mess with the frame alignment too much.
https://www.sheldonbrown.com/frame-spacing.html
When looking at chainline, I had a double chainset (52/42) and just bought some single chainring bolts (very cheap!), removed the outer ring, and refitted the inner ring using the new chainbolts. The halo Aerotrack rear wheel I bought shows that the front chainring should be 42mm from the centre of the frame, and everything seemed to line up okay.
I think if you're riding fixed, chainline and tension has to be spot on. I'm not sure it needs to be so precise for single speed though.
https://www.sheldonbrown.com/frame-spacing.html
When looking at chainline, I had a double chainset (52/42) and just bought some single chainring bolts (very cheap!), removed the outer ring, and refitted the inner ring using the new chainbolts. The halo Aerotrack rear wheel I bought shows that the front chainring should be 42mm from the centre of the frame, and everything seemed to line up okay.
I think if you're riding fixed, chainline and tension has to be spot on. I'm not sure it needs to be so precise for single speed though.
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