you didn't specify why you need a new wheel, is it just out of true, is it broken, is it bent?
If the wheel just needs to be trued this is an easy fix for most mechanics. You can even do it yourself using the brake pads as a guide. If a spoke is broken, this can be easily replaced and retrued. If the rim is actually bent or broken, then the rim should be replaced.
Rims can be replaced but they require a good mechanic that has the skill to relace the wheel, true it and tension it properly and at a minimum a decent mechanic with these skills will charge $25-50 for the labor. Assuming that the mechanic can get the exact same rim you are looking at about $20-50 for the rim. If that particular rim is not available then they can get something similar but it will most likely require a new set of spokes because rims are different thicknesses. Most shops charge $1-3 per spoke times 32 or 36 spokes for a typical wheel.
The easiest fix is to just buy a prebuilt wheel, these will typically run about $25-65+ for a complete wheel (not including tire, tube and rimstrip).
Your local bike shop/Diamondback Raleigh dealer will be able to help you determine what is best for your situation.
put a couple drops of oil on the stanchion tubes of the shock forks where they seals connect with the sliders and see if that helps. It is possible that inside the fork it has dried out and the spring needs some grease where it seats inside of the fork.
where the bars meet the gooseneck (the part that goes down into the frame ) there is a bolt, Tighten it. If it still does the same thing... you need a new gooseneck because it is probably stripped.
It does sound about right.You would really be better off taking the wheel to a Bike Shop and having them assess it and install it unless you have the skill and all the special tools to remove the cassette, cassette body and hub cones.http://www.parktool.com/blog/repair-help/freehub-service
spray it with WD-40 or any other spray lubricant, leave it for a bit, wipe off the excess lubricant and tap it w/a mallet. you can use a hammer if you dont have a mallet but not to hard:) then try it again:)
You will need to remove the shrouds on wither side of the Exercise bike. You will see on each crank, or at least one of them, there is a cotter pin with a bolt The cotter pin needs removing and you will be able to turn that pedal arm to 180' to the other one. Spare parts appear to be obsolete, but you should get parts for the crank arm from a good cycle shop. Very often the cotter pin needs to be filed to fit. Tightening the nut locks it in place. There are two videos, the second one refers to cycles which is where my experience comes from.
https://www.manualslib.com/manual/2258999/Diamondback-910ic.html#manual
Take the caps off the top of spring tube and I believe you have to have a long rod, with a socket, of what ever size it may be to loosen, tor tighten either/or the bolt that tightens the spring or loosens the spring.. Some have them some don't.. Hope this helps....
The front bearings on this bike seems to be quite standard, but there is a choice between steel and aluminum or stronger bearing cones. Any bike workshop should stock them and replace in little time at such low price, it's not worth wasting time trying to do it oneself.
Bicycle manufacturers generally only print one "owners manual" version that covers all of their bikes. They are very generic in nature. If you are looking for a resource on how to fix your bike, your local library will have millions bicycle repair manuals, Amazon, Half.com and YouTube are great resources.
