Lexique

ANODIZATION

Surface treatment of aluminium which consists of dipping the material in chemical baths to create a uniform and protective layer on the material, coloured or not (aesthetics choice).

BENDING

First step of transformation of an aluminium bar to obtain a wheel spiral.

BENDING RADIUS

Part of the curved rim profile that can be given several aesthetic aspects (stickers, marking, etc.).

BRAKING BAND (B.O.S)

Machined surface in anodising contact between the brake pad and the rim profile. Allowing pad brakes to have better grip and more efficient braking.

BRIDGE

The top wall connecting the two pin channels on a double wall profile: it can be of different shape depending on the ETRTO (ETR).

CATAPHORESIS

Surface coating particularly suitable for steel spokes. This treatment provides protection against corrosion and a perfect appearance. This process can be applied to stainless steel spokes with a prior treatment.

ELBOW

The angle of the beam head is adjustable and variable to form the bend.

ELLIPTIC

A spoke with an oval diameter (shaped spoke).

ETR (EASY TUBELESS READY)

Mach1 concept developed in 2014 that allows rims to be compatible for tubeless mounting of the tyre, i.e. without tubes.

ETRTO (EUROPEAN TYRE AND RIM TECHNICAL ORGANISATION)

Recommendations for tyres, rims and valves for all types of vehicles. Essential to the design, the aim is to harmonise all the professionals around the wheel in Europe (dimensions, load, pressure, etc.).

EYELET

Single or double; it allows for wall reinforcement, higher spoke tension and helps with nipple positioning, a more even spoke assembly ad more reliable wheels over time.

FLANC

Represents the outer lateral sides of the profile on the rims (more pronounced on rims with disc brakes).

GALVANISED STEEL

A coating applied to steel to protect the material and prevent rusting. Galvanised steel is chosen for its durability, strength and protective function.

GAUGE

Designates the thread diameter of the spoke or nipple (12G, 13G, 14G, 15G).

HOOK

Two of them are part of the upper profile definition and follow the ETRTO rules, they are connected to the rim base for tyre grip.

JOINT PLAN

Location where the two ends of the rim hoop meet (hoop closure).

NAPPE

A conventional wheel has two layers of spokes, one on each side of the wheel.

NOSE

The bottom wall of a rim profile where the holes for the spokes are located.

OXIDATION

In-depth treatment in the material of the spoke; finish adapted to stainless steel spokes.

PIN CHANNEL

Cavities in the profile to accommodate the pins for closing the rim.

PINS

Small steel pieces inserted into the rim channels (one pin per channel).

PROFILE

Aluminium bar extruded in a predefined shape (single, double, triple).

RADIAL ANGLE

Drilling orientation on the rim can vary by plus or minus 10°. This improves the position of the spokes on the hub for wheel mounting.

REDUCED CROSS-SECTION

Refers to a change in diameter of spoke; there are several types: single and double reduced cross-section

RIM TAPE

A plastic or rubber protective tape covering the bottom of the rim (the bridge) to seal the spoke holes and prevent puncturing the inner tube. When mounted tubeless, it is a self-adhesive rim base that seals the rim and prevents leaks.

SANDBLAST

Sandblasted (grainy) paint finish found on some Mach1 wheels.

SLEEVE

A part adapted to the inner shape of the rim profile: it is inserted inside the rim for its closure (tight fit).

SPOKE KEY

An essential tool in cycle mechanics for adjusting the spokes of a wheel (tensioning). It allows the tightening or loosening of the nipple.

THREADING

The operation is performed opposite the spoke head. This is a spiral forming operation allowing the nipple to be screwed on, the threading follows the BSC standard.

TRINGLE RESTORATION

Defined by the ETRTO, it allows the bead of the tyre to be accommodated.

TRUING

An operation on a bicycle wheel that consists of adjusting the tension of the spokes to centre the rim in relation to the hub, while balancing the tensions between the two layers of the wheel.

VALVE

A visible element on the rim, which allows inflation or deflation.

WIDE ANGLE SYSTEM

Technology developed by Mach1 to increase the value of the angle between nipple and spoke head.