change 3 speed to standard?

How to fix a paddle with sriped theards?

Bike gears?

There is no resistance on my bike, no matter what button is pressed?

bicycle?

How can I fix the chain in my bike?

How can I fix my break adjuster? It isn't going into the break lever?

How do I remove the rear wheal gear sprocket?

raising handlebars?

how can I fix my handlebars on my bike?

front wheel won't fit!?

when i do one full turn of pedals i have a knocking noise on every rotation?

bosch ktr1670gb/45?