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Mongoose 24 Inch XR75 Bike Questions & Answers
Putting the chain on
While the bike is in riding position loop the chain on the back sprocket. If this is a single speed bike then place as much of the chain as you can on the top of the front sprocket. Once it is partially threaded you can crank pedal around a half a turn and the chain will pop on the rest of the teeth.
Adjust rear shock(soften) mongoose ledge 2.1
Understanding Sag
In order to let the suspension work properly, we allow some of the rear-wheel travel to be used when supporting the rider's weight, this is called 'sag'. The basic idea is to have around 10-20% of your bike's total travel as sag. This allows the rear wheel to drop into dips in the trail and maintain contact and traction.
Adjusting Sag on Rear Suspension
Changing the amount of sag in the rear suspension is done by increasing or decreasing the spring rate of the rear shock. The rear shock's body is threaded and you will notice there is a nut on one end of the spring. Turning the nut in the direction that compresses the spring will increase the spring rate and reduce the amount of sag. Turning the nut in the direction that expands the spring will decrease the spring rate and increase the amount of sag. Never turn the nut to the point where there is space between it and the spring, this may cause damage to the shock.
How old is this mongoose bike Serial number HYEB00689
Google "mongoose serial number". That is what anyone here would have to do to answer your question. You may or may not be able to determine the age from serial number, but bike condition is far more important than age..
3 piece front crank set "size" for mongoose xr100
"Size of what? chainwheel, crank length, Bottom bracket spindle length? Not possible to say in any case, as manufacturer specs can change, even in a model year. Take to a bike co-op or bike shop for advice or search online for "replace crankset".
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