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.
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.
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).
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.
PIN CHANNEL
Cavities in the profile to accommodate the pins for closing the rim.
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.
BENDING
First step of transformation of an aluminium bar to obtain a wheel spiral.
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.
ELBOW
The angle of the beam head is adjustable and variable to form the bend.
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.
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.
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.).
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.
FLANC
Represents the outer lateral sides of the profile on the rims (more pronounced on rims with disc brakes).
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.
PINS
Small steel pieces inserted into the rim channels (one pin per channel).
GAUGE
Designates the thread diameter of the spoke or nipple (12G, 13G, 14G, 15G).
SLEEVE
A part adapted to the inner shape of the rim profile: it is inserted inside the rim for its closure (tight fit).
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.
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.
OXIDATION
In-depth treatment in the material of the spoke; finish adapted to stainless steel spokes.
JOINT PLAN
Location where the two ends of the rim hoop meet (hoop closure).
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).
PROFILE
Aluminium bar extruded in a predefined shape (single, double, triple).
BENDING RADIUS
Part of the curved rim profile that can be given several aesthetic aspects (stickers, marking, etc.).
TRINGLE RESTORATION
Defined by the ETRTO, it allows the bead of the tyre to be accommodated.
REDUCED CROSS-SECTION
Refers to a change in diameter of spoke; there are several types: single and double reduced cross-section
SANDBLAST
Sandblasted (grainy) paint finish found on some Mach1 wheels.
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.