Yuba Bicycles LLC
Mundo Cargo Bicycle [ Owner’s Manual ] Page 13
TIRES: Maintaining proper inflation levels of your tires ensures a smooth, efficient and safe ride. Make sure
that the tires are inflated according to pressure indicated on tire sidewall. Improper tire pressure will cause
excessive wear, causing premature replacement. A foot or frame pump should be used. Pressurized,
unregulated pumps should not be used.
The tire should be properly seated in the rim and the fitting of the tire bead and rim bead should be checked.
If the tube is pinched between the tire and the rim, it will explode when inflated. Ensure that the tire is not
cracked or unevenly worn. Check for bulges. Check that the valve is straight in the rim. Irregular tires should
be replaced immediately.
CHAIN: Check frequently for damage and stretch and replace if necessary. Lubricate several times each
season and after each washing or ride in the rain. Use a lightweight, all-purpose oil, being careful to oil each
link. Chain specific oil is available from any bicycle shop. The chain must be replaced after a maximum of
1250 miles. This requires special tools and should be performed by a certified bicycle mechanic.
CHAINRINGS: Replace if chainring teeth are bent or damaged. Keep chainrings tight on crank.
CRANKS& PEDALS: Crank assembly should turn freely without side play. Check the bearing play of the
cranks by grasping the end of the crank near the pedal thread and trying to wiggle it laterally. If you detect
play, have it corrected by a dealer.
Keep locknut tight and keep bearings clean and well adjusted. Check crank bolt or nut (depending on axle
type) regularly to make sure crank arms stay tight.
Replace bent cranks immediately! Do not attempt to straighten.
Replace pedals if bearings are tight or frozen and if thread is lost or badly worn. Keep pedal bearings
lubricated.
REFLECTORS: Your reflectors are an important safety feature of your bike, do not remove them. Every three
months, check the nuts and bolts holding the front, rear, pedal and wheel reflectors and make sure that they
are tight. Also check the alignment of the front and rear reflectors; their reflective surfaces should be
perpendicular to the ground. The rear reflector should be at least three inches below the top of the seat. KEEP
REFLECTORS CLEAN AT ALL TIMES.
FRONT DERAILLEUR ADJUSTMENT:
The derailing cage must be positioned high enough to clear the chain wheels while shifting. If an adjustment
is necessary, loosen the frame clamp and reposition accordingly. When re-tightening the frame clamp bolt,
make sure the curvature of the derailing cage is concentric to the curvature of the chainwheel and that the
derailing cage is in line with the chainwheel.
The front derailleur should shift smoothly and easily between the chainwheels. If the front derailleur does not
shift correctly, it can be adjusted as follows:
1. Place left lever all the way forward, or twist shift all the way back, and adjust screw “H” to center
derailing cage and chain over the large chainwheel.
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