Mountain Cycling - Recent Questions, Troubleshooting & Support

tighten the center bolt of the head stock that holds the handle bars

Mountain Cycling | Answered on Sep 18, 2018

loosen rear tire pull back and tighten when chain slack is removed

Mountain Cycling | Answered on Jul 09, 2018

Google (sumer)(18)(manual) without parens OR request directly from Sumer.

Mountain Cycling | Answered on Jun 30, 2018

Not that important except for selling the bike, but if you really need to know then Google "Trek serial number" or "Trek 8000". Not possible to ID with just serial number. For more info see my T How to determine the year value etc of your bicycle

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Mountain Cycling | Answered on Apr 24, 2018

Not clear yet - enter your question into Google for details

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Mountain Cycling | Answered on Mar 01, 2018

The brand is on the head badge (on the part of the frame where the fork goes through to the handlebars). If that is missing, and there is no model name on the frame then it will be very difficult to ID brand. Please note that removal of the head badge may indicate the bike has been stolen, or that the bike has been repainted - often poorly. You don't need to know brand to work on it or to get parts..

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Mountain Cycling | Answered on Feb 21, 2018

Not a problem that can be diagnosed without eyes and hands on the bike. Post a clear video, or better - take to a bike shop or bike co-op.

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Mountain Shimano... | Answered on Jun 12, 2017

have no real idea what it is . google search shows many things even a pontoon inflatable boat . the wheel hubs could be wore out

Mountain Cycling | Answered on Jan 28, 2017

I don't know the name of the part, and it's going to be very difficult to ID the part over the Internet. That is a bike that sells for under $100, and therefore unusual OEM parts would be very hard to find. Take to a bike shop to see if they can suggest a fix.
NOTE: The bikes are distributed by Dynacraft, which has been the subject of suits and settlements due to serious fork and frame problems. Dynacraft BSC Inc

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Mountain Cycling | Answered on Dec 07, 2016

What rim you need has too many variables (width of tire to be used, your weight, balance of road/off-road usage and roughness of off-road use, budget, etc.) that you have not mentioned for anyone to give an appropriate recommendation.

Secondly, unless the rims are both bent it's a waste of money and effort to replace them, as good quality rims and spokes alone (a new rim may need different length spokes) could cost almost as much as the original cost of the bike ($119), let alone when you add labor.

Finally, worrying about "ultra light" rims, especially on a bike that weighs 35+ lbs, is useless. Shaving off ounces when the bike and rider together could weigh 200 lbs. is not going to make it faster or easier to pedal.

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Mountain Cycling | Answered on Sep 28, 2016

There are a number of different designs of crank and detachable pedals and some that have been forged in one or two pieces and so the procedure will vary depending on the design of yours.

I suggest you search on youtube for a helpful how-to video.

Mountain Cycling | Answered on Aug 30, 2016

it is the circumference of the wheel in millimeters. You can measure this yourself as each wheel can vary slightly depending upon the tire used, air pressure, tread wear, and rider weight. You can use the "roll out" method: put the valve in the six o'clock position, roll the bike forward in a straight line until the valve is back to the six o'clock position and measure the length between the two points. If you measure in inches you can multiply by 2.54 to get centimeters or 25.4 to get millimeters. For more detailed instruction read Sheldon Brown's great webpage on the subject here:

Mountain Cycling | Answered on Apr 18, 2016

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