Jan 18, 2010
How Do I Take Off The Chain On A Mountain Bike To Get A New Tire Because My Old One Is Flat?
I can’t find the chain link and my tire is flat so i need to get a new one..is tehre any way I ca take off the chain or do I even need to take the chain off?
It is a mountain bike.
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You don’t need to take off the chain. It’s best if you don’t. Loosen the rear axle. Yours might have nuts (use a wrench) or a quick release (just open the lever). If you push the axle down in its slots it will come free of the frame. You can then just move the wheel to the left, disengaging the back cogs from the chain. It can get messy, so wear rubber gloves if you have them.
HTH
Shift the chain onto the smallest front chain ring, then shift the chain to the smallest rear cog on the cassette. Now unlock the skewer, if used or, if not loosen the nuts on each side of the frame, then slide the wheel down and out of the drop-outs. After the wheel axle clears the drop-outs you have to work the chain off the small cog to free it.
To reinstall the wheel – with one hand push the rear derailleur down and forward as you insert the wheel into the frame. Be sure that the top of the small cog of the cassette engages with the upper portion of the chain not the bottom. When the chain is engaged then pull up and back. The cassette should move up and around the guide wheel of the derailleur as in moves into position. The chain should pass over the top of the small cog then double back toward the front of the bike then over the guide wheel if you’ve done it correctly. Line up the axle with the drop-outs and pull it into place. When its fully seated in the drop-outs tighten the skewer and re-lock it.
The procedure takes a bit of practice so be patient until you get it right. http://www.sheldonbrown.com has good info and lots of photos that may help. There is never any need to take the chain off for routine wheel removal.
Shift the left gear to #1 and the right to the highest number. That will give you plenty of chain slack to work with (never ride your bike with that combination). Loosen the axle and pull the wheel out, when you put it back in put the chain on the smallest sprocket. There is no need to break the chain.http://bicycletutor.com/part/wheel/