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Lately I've been buying $10 stems to try and get the bike fit dialed.
In the past I modified the air shaft on a Spinner 20" suspension to get the air compression ratio closer to 2.5:1. The stock compression ratio was over 4:1. The fork would either not mover or blow through the travel. This was a few years ago before other moderately inexpensive 20" forks existed. I also built a tubeless rear wheel using atomlab rims and bontrager/Dt240 hub that I scored for $50. I converted a 10 speed cassette to 8 speed to improve the chain line.
I'm at the point now where I am saving the wife's old bike for the oldest to grow into. That's a year or two away.
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