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Need help with GT zum

I have GT zum small frame and old bike mantis free fall bike ( wanted to check if I can use the parts from mantis to zum..

I am planning to use the bike for to go on the paved path.
You want to fix this one up.... .

with this one.... .
Many things to consider like the Zum has 26" wheels and the other don't. The first one has
Good maintenance to your Bike, can make it like the wheels are, true and smooth!

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