• Hi, if your bottom bracket is normal English threading then yes it would fit, but just thinking that on a fixie you might be better with shorter cranks because you can get pedal strike going around corners. Probably best to leave the tyres too as they're quite nobbly.

    You can have the post and saddle for £20 posted.
    The post is like this one, but a bit shorter. In good condition. It's 27.2mm so you need to check your frame size.

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