m520'S are a no fit :-(

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fossyant

Ride It Like You Stole It!
Location
South Manchester
Where the rear wheel goes in the frame, on older bikes (like mine) the 'drop out' is slotted - allows you to adjust the wheel forwards and backwards (used to be because some frames weren't straight and handy if you break a spoke)

All new frames have vertical drop outs - no fore/aft movement. With the 'horizontal' drop out, it allows you to run a fixed as you can move the wheel to take up chain slack.

That's why it's getting really difficult to pick up a descent old frame these days..... all these fixie types are buying them...
 
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