Question about Mongoose Butterfly Summer 12" Girl's Bike

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Why does my new bike's back wheel not spin easily?

I bought a new bike off the internet and the back wheel is not spinning easily. it appears that the coaster brake or connections to the back frame are too tight. it is difficult to pedal and the wheel does not spin as easily as it should. there are no obvious chain , sprocket, or frame defects.

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If brake and aligmen t of wheel is good the bearing ajustment is too tight remove the wheel loosen the nut on each side not too loose just so it turn freely with no play in the wheel let me now pierre

Posted on Dec 15, 2008

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The bikes are pre-assembled by a machine that overtightens the rear axle.  I had the same problem with my daugher's 12 inch huffy princess bike and my other duaghter's 16 inch Schwinn bike.  If you loosen the nuts on the back axle it fixes the problem.  I have read that the idea thing for these bike is to have them re-assembled and re-lubricated by a bike shop, but I thought this might cost as much as I paid for the bike. 

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