BH bikes Bolero Pro Manuel D'utilisation page 44

Replacement of wear parts
The usual wear parts are tires, inner tubes, brake pads, discs and shoes,
and the rims when they are part of the braking system, Light bulbs, batteries
and their installation.
Tires: Change them for identical or equivalent ones. See the mark on
the outside of the tire (Norm E.T.RTO).
Please note that if the outside diameter of the replacement tire is greater
than the original tire size, you may touch the front wheel or mudguard with
the tip of your feet when turning. As a result, you may lose control of the
bicycle and be seriously injured. The same may happen if you change the
crankset for longer ones.
Tubulars: For a perfect fit on the rims, tubulars must be inflated to
a certain minimum pressure. Check the recommended pressures in the
instruction manuals of the rim and tubular manufacturer. Also, mind the
assembly methods the manufacturer recommends.
Inner tubes: replace with an equivalent type of inner tube that is
compatible with the tyre. The make can be found on the outside of the inner
tube (E.T.R.T.O. Standard).
Brake shoes: Check brake shoe wear periodically. When the
control grooves are invisible, change the shoes for others of same type and
dimensions.
Brake pads and discs: Refer to the manufacturer's specific manuals
supplied with the bicycle.
Rims: If the rims are part of the bicycle braking system (the shoes
operate on the rims) they can wear excessively. Check the control marks
on the rims regularly, and change the rims for others of same type and
dimensions as and when necessary.
Light bulbs and their installation: Replace with an equivalent type of
bulb. Refer to the markings on the metal part of the bulb.
Batteries: Replace with an equivalent type. Refer to the markings on
the outside of the battery.
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