Highlights

Double wall build
Aero profile
ERD of 423mm
Sleeve joint

Description

The Alex DA22 is an aero profile, double wall rim for 20 inch wheels, sized for 1 1/8 and 1 3/8 tyres.

It is built with a sleeve joint and has an ERD of 423mm, which is the number you need to work out spoke lengths before lacing it up.

Features

Double wall build. A second wall inside the rim adds material where the spokes pull and where hits land.
Aero profile. The extrusion runs an aero shaped profile rather than a flat box section.
ERD of 423mm. Use the 423mm effective rim diameter to calculate spoke lengths before you order spokes for the build.
Sleeve joint. The rim ends are joined with an internal sleeve.
20 inch, 1 1/8 to 1 3/8. Sized for 20 inch wheels running tyres in the 1 1/8 to 1 3/8 range, so it suits skinnier race style rubber.

Specifications

Wheel size: 20"
Rim width: 1 1/8 / 1 3/8
Note: Aero profile double wall, sleeve joint. ERD 423mm.

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ERD effective rim diameter, from the spec sheet mm

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Hub spacing locknut to locknut, 100 front or 110 rear on most BMX mm Same both sides front hubs, or matching flanges

Flange diameter spoke hole centre to the opposite hole centre. The drive side is the driver side, left or right hand drive alike, and is usually the bigger flange

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Flange position

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