“There is nothing better than hand-crafted”.
That is the reason why Irwin insists on hand-made wheel-building.
IRWIN WHEEL BUILDING
Irwin is devoted to providing its customers with high quality products. Even before lacing the wheels, the rims’ appearance and dimensions are inspected to ensure the rims meet our specifications for assembling.
“There is nothing better than a set of handcrafted wheels.” That is why Irwin insists on building and adjusting the wheels by hand.
Irwin technicians handcraft the wheels with special brass nipples that can adjust to different angles. The rims are also specifically designed to hold the nipple at a special angle that reduces excessive bending and spoke stress, which extends the life of the spokes and make Irwin wheels more durable.
To ensure every Irwin wheel meets our strict quality standards, Irwin technicians test and adjust the radial, lateral and dishing tolerances of each wheel. We maintain a strict maximum lateral tolerance of 0.3mm, radial tolerance of 0.4mm and dishing tolerance of 0.5mm.
The spoke tensions are also tested and adjusted to remain between 850 ~ 1100 N for the front wheel and 1100 ~1400 N for the rear wheel’s drive side. Further, difference between the maximum and minimum tension meter value of the rear wheel on non drive side is kept under 0.3mm.
In order to avoid the spoke from twisting during wheel building, it is vital to carry out spoke stress release to make sure both of the strength of the hub spoke holes and carbon rim nipple hole corresponds with the strength in need.
Each wheel undergoes through one final check using precision instrument to ensure each handcrafted wheel maintains a maximum lateral tolerance of 0.3mm, radial tolerance of 0.4mm and dishing tolerance of 0.5mm.