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Derby 40i AM Custom Handbuilt 29 Inch Wheelset with Onyx Classic Hubs
Derby 40i AM Custom Handbuilt 29 Inch Wheelset with Onyx Classic Hubs
Derby 40i AM Custom Handbuilt 29 Inch Wheelset with Onyx Classic Hubs
Derby 40i AM Custom Handbuilt 29 Inch Wheelset with Onyx Classic Hubs
Derby 40i AM Custom Handbuilt 29 Inch Wheelset with Onyx Classic Hubs

Derby 40i AM Custom Handbuilt 29 Inch Wheelset with Onyx Classic Hubs

See Final Price in Cart - Questions? Email support@customwheelbuilder.com or call (855) 762-6564
Regular price
$1,862.00
Sale price
$1,862.00
29" x 40i - for 29-Plus tires and frames
AM, Enduro/DH layup options
- ideal for 2.6 to 3.0 & up to 3.5 tires
Weight +/-10: 520g [All-Mountain]
Outer width: 45mm, Inner width: 39.5mm, Depth: 31mm
ERD: 582mm, Note: Spoke off-set from rim center: 5mm

- Material: UD carbon-fiber
- Spoke holes - Mountain: 32
- Spoke hole size: 4.5mm (for external nipples)
- Spoke hole alignment, for all rims (except 27.5: x 45i and 29" x 40i): Rim centered, All rims have spoke holes angled towards hub flanges. Key/First spoke: Stand up the rim vertical as if ready to roll forward, with valve hole at the ground. Looking down at the valve hole, the 1st spoke hole forward of the valve hole angles to the right-side hub flange, next spoke hole forward angles to the left side hub flange, etc.
- Presta valve hole, required length: 40mm minimum (48mm Orange Seal valves are recommended)
- Recommended max spoke tension: 125KgF
- Recommended rider weight limit: 225 lbs 100Kg for AM, 300 lbs 135Kg for Enduro/DH rims
- Max tire pressure (mountain): 35 psi (for road use of mountain rims), 22 psi for 2.6 and larger tires. Max for Enduro/DH race/park/shuttle: 30 psi, ProCore max pressure: 70 psi, 4.5-bar
- Tire pressure to seat beads of most new tires, with soapy water or bead seating lubricant: 35 to 40 psi for mountain rims
- Tubeless rim tape maximum width: 18mm or ¾ inch for 30i and 35i rims; 25mm or 1 inch for 40i and 45i rims; Only tape within the center channel, do not taping over the bead seats, for best results.
- Recommended rim tape : Orange Seal rim tape 18mm or 25mm wide (two rounds), Stan's 12mm wide for BX & CX used for XC race (two rounds).
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Hole Count & Lacing Pattern Front
Sapim Spokes

14ga (2.0mm) - 436g*
14/15ga (2.0/1.8/2.0mm) - 382g* - Most Popular
Aero Bladed (2.0/2.3/2.0mm) - 264g*

*Weight based on 64 spokes, 264mm length
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We use Sapim Polyax 12mm brass and 14mm alloy nipples

Brass - 64g
Alloy - 24.4g

Weight based 64 nipples
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Wheels are delivered tubeless ready with the appropriate width rim tape installed.
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Customizations Total: $0.00

Custom Derby 40i AM 29 inch wheels with Onyx Classic hubs, handbuilt in Colorado Springs, CO.