20 Most Recent Mountain Shimano Altus Front Bike Derailleur Bicycle Part 78 Questions & Answers

There are a couple of possible problems. You can try backing off the cable tension a little bit at the shifter and running back and forth through the gears adjusting as you go till it hits 2nd coming down.You can also try backing off the High limit screw on the derailleur. This will allow the shift to start a little farther from the bike hopefully hit 2nd. Hope this helps.

The old lubricant has gummed up. It needs a good cleaning and relubrication.
"STI shifters gum up after years of use. I've had good luck with this method and since it's nearly free it's probably worth a shot--

"Get a can of WD-40 or a similar light solvent/oil solution. Pull the brake lever back to the bar to partially expose the shifting mechanism and generously hose down the interior with your solvent. I mean really get it in there from all directions, using the little red spray tube if possible. Let it sit for a while and then drizzle in some light oil like Tri-Flo or similar. Then wipe down the exterior of the shifter with some Simple Green or other degreaser (to keep the overspray off your hands).

"I've rescued two sets of STI-type shifters with this method. Hope you get your problem solved one way or another, because new Dura-Ace sure ain't cheap."
source: http://www.bikeforums.net/archive/index.php/t-83743.html

Sorry, this question doesn't make sense. Are you trying to remove the spring or are you trying to adjust it?

No specific manual, but they are all the same basics https://www.google.com/search?q=Nishiki+Colorado+XC+Mountain+Bike+manual They are made by Kawamura Nishiki is a brand of bicycles designed, specified, marketed and distributed by West Coast Cycle in the United States, initially manufactured by Kawamura Cycle Co. in Kobe, Japan, and subsequently by Giant of Taiwan. The bicycles were first marketed under the American Eagle brand beginning in 1965[1] and later under the Nishiki brand until 2001. https://www.google.com/search?q=Kawamura+mountain+bike+manual ..

Multiply the size in inches by 25.4 converts it to metric.

hi if i remember correctly to size up for a bottom bracket, flip your bike upside down resting on handle bars and seat carefully not to damage anything, and where the bottom bracket go's through the frame of the bike you take a tape measure and measure the width of only the frame housing where the bottom bracket go's into this is a lot easier to do when the crank arms are removed. also on some bottom brackets when removed from the bike has all the data stamped on it depending on the type of bottom bracket. if not measure the width of the frame where the bottom bracket sits in too and that will be the size of the bottom bracket you need, then determine which type it is once you have remove the cranks arm which are attached to the bottom bracket could be splined drive or square tapered type bottom bracket basically the shape of the metal part that the crank arms push and bolt on to then match up on a cycle part website.

The front wheel is normally held in with one of two common methods. A basic nut on each end of the axle or a 'skewer' pin. On most bike that do not have disc brakes you might need to unhook the brake arms to allow the tyre to clear the brake pads. For the nut type simply slacken the nuts and drop the wheel out of the C shaped notches the axle sits in. The skewer type is a small lever on one side you swing all the way over then slacken the nut on the opposite side two or three turns. The wheel should then drop down and out.

you have a repair problem with yours?

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

Below are Google searches related to selecting derailleur hangers and derailleurs: https://www.google.com/search?rlz=1C1AVNG_enUS623US623&sxsrf=ACYBGNTYWvyU3GyWyJhkVrHsWKAyVWyeAA%3A1571575082791&ei=KlWsXe72L6jn_QbSp4fIDA&q=How+do+I+find+the+right+derailleur&oq=How+do+I+find+the+right+derailleur&gs_l=psy-ab.3..35i39l2j0i22i30l2.199.2278..3734...0.2..0.415.1692.1j2j2j1j1......0....1..gws-wiz.......0i71j35i304i39.yg6EQfBH3Q0&ved=0ahUKEwjus7C07arlAhWoc98KHdLTAckQ4dUDCAs&uact=5 https://www.google.com/search?rlz=1C1AVNG_enUS623US623&sxsrf=ACYBGNTI9ScWRMkGmDQ4BGOVQRDXXGpbKg%3A1571574983623&ei=x1SsXcPSJYSyggf2y4CYBg&q=How+do+I+find+the+right+derailleur+hanger&oq=How+do+I+find+the+right+derailleur+hanger&gs_l=psy-ab.3..35i39j0i22i30.2330.7755..8526...2.1..0.151.571.1j4......0....1..gws-wiz.......0i71.XM0vCxnxmSg&ved=0ahUKEwiD0ouF7arlAhUEmeAKHfYlAGMQ4dUDCAs&uact=5

Yes it can, This web has diagrams and instructions with pictures,http://www.bikewebsite.com/rhub.htm.

Unless your feet are extremely angled in or out on the pedals it is not possilbe for your shoes to hit either wheel while traveling straight ahead. When you turn you should coast.

No, you don't need to contact the manufacturer. There are two possible solutions. First, if the chain is sized one full link (inner+outer) too long it can just be shortened. The other option is a new chain (made for 5 gears in back) but a new chain will not always mesh with the gears if the bike has a lot of miles on it, especially if the small gears in the back have been ridden a lot. Either way I would really suggest you get some local help, as sizing and installing a chain requires both knowledge and a specialized tool.

See page 5 of manual. https://www.sunmountain.com/images/userguides/V1SpeedCartUserGuide.pdf

That bike was made from 1993-1998. It's a standard Cro-Moly (i.e. Steel) non-suspension mtn bike. In other words, there is nothing unique about it that would require an owner's manual. I might suggest you post the actual issue with the bike to get some feedback as to how to deal with it.

Find it here http://www.manualsonline.com/

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

Forget the "parens" and tell us what you mean by "show the gear system". Do you want to know how to shift the gears or how to fix them. Either way the manual will be of no help.

You will either need to replace the stem with one that has more "rise": https://www.google.com/search?biw=1440&bih=760&ei=i7kxW6D8Fq6J5wKPkYGYAg&q=riser+stem&oq=riser+stem&gs_l=psy-ab.3..0i20i263k1l2j0l4j0i22i30k1l4.1525.3516.0.3878.10.10.0.0.0.0.196.1180.0j7.7.0....0...1c.1.64.psy-ab..3.7.1177...0i131k1j35i39k1j0i67k1j0i20i264k1j0i131i67k1j0i20i263i264k1.0._XQ2OWB326g riser stem Google Search OR install a "stem riser": Stem riser Google Search I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881

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 I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881