I would like to know the size of the frame on the Mongoose 29in Torment Men's mountain Bike

SOURCE: front suspension to soft on mongoose xr-75

The front forks aren't adjustable, as you probably figured out. You can, however, get harder springs if the springs can be accessed at the top of the fork tube. If not, do what I did on my mountain bike. I bought a better pair of adjustable forks that I found on eBay. It will take a bit of investigation on your part regarding the dimensions of the forks, so you get the correct length and width where the forks fit onto the frame (and the overall desired fork length), but you'll be a lot happier with adjustables.

SOURCE: New Mongoose 700c Men's Paver bike: Mongoose 700

Local bike shop determined that both wheels were defective. I took the junk back to Walmart and got a refund... PROBLEM SOLVED!!

SOURCE: Mongoose Handlebar adjustment

where the bars slide into forks there should be a allen nut on the top undo this slightly and adjust bar height then tighten up allen nut

SOURCE: loose handlebars on a Mongoose XR-75 mountain bike

Check the splines on the handle bar. Just loosen the "clamp" and slide the bar over to one side enough so you can tell if the are stripped or not. If they are then replace the bar, if not then reassemble and try to put a littlle extra torque on the bolt.

I have noticed with the 2 of these bikes that I have that the bars do not like to stay tight for long, they tend to work thier way loose about every other time we use them. I just keep tightening them untill the splines strip, then pick up a new bar.

Contact Mongoose for parts info at: www.Mongoose.com under "about" click ask mongoose.

Good luck.

SOURCE: mongoose tactic mountain bike / loose crank on

The crank has to be removed to tighten the nut that holds the gear on. I assume that is your problem is with the chain gear on the sproket that is loose

Testimonial: "I need a special tool to remove crank /nothing Ive ever seen"