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Derby 25i BX Custom Handbuilt 27.5 Inch Wheelset
Derby 25i BX Custom Handbuilt 27.5 Inch Wheelset
Derby 25i BX Custom Handbuilt 27.5 Inch Wheelset
Derby 25i BX Custom Handbuilt 27.5 Inch Wheelset
Derby 25i BX Custom Handbuilt 27.5 Inch Wheelset
Derby 25i BX Custom Handbuilt 27.5 Inch Wheelset

Derby 25i BX Custom Handbuilt 27.5 Inch Wheelset

Wheels are built 100% by hand based on your specific needs.

Spokes are prepared using Wheelsmith Spoke Prep before being laced and tensioned. Wheels are then stress relieved, re-tensioned and brought into true. 

Most wheels ship in 1 - 3 weeks. If wheels are going to take longer to build, due to shop lead time or product availability, we'll reach out to keep you updated.

15% Discount Automatically Applied In Cart

Regular price
$1,405.00
Sale price
$1,405.00

Custom Derby 25i BX 27.5 inch wheels, handbuilt in Colorado, with your choice of hubs from Chris King, DT Swiss, Hope, Industry Nine, Onyx, Project 321, Shimano or White Industries.

650b/27.5" BX 25i
XC layup
- ideal for 1.8 to 2.25 XC tires
Weight +/-10: 415g
Outer width: 31mm, Inner width: 25mm, Depth: 32.5mm
ERD: 540mm

    • Material: UD carbon-fiber
    • Spoke holes - Mountain: 32,28
    • Presta valve hole, required length: 40mm minimum (
    • Recommended max spoke tension: 125KgF
    • Recommended rider weight limit: 175 lbs / 90kg  for XC rims, 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 channeldo not taping over the bead seats, for best results.


    The 35i AM Derby Rims are about the same weight as 22mm inside wide major brand's "light weight" XC aluminum rims.

    The external design and all dimensions of the rims are the same for either XC layup, AM layup, or DH layup, for each wheel size. Additional carbon-fiber layering inside the hollow "double-wall" rims is thicker and stronger than XC in the AM and further reinforced DH options. The AM is about 20 to 25 grams heavier in carbon-fiber layering than the XC layup, and the DH is about 35 to 45 grams heavier in carbon-fiber than the AM layup.

    XC, CX, BX (Cross-Country) layup Derby rims are for small light weight tires under 600 grams and 2.25 maximum tire size, with short knobs or semi slicks for mainly smooth hard pack and gravely conditions, and where wheel rolling climbing weight and acceleration is more important than descending control. Although DH bike riders call their 6-inch travel Enduro-DH bikes their "XC bikes", use of aggressive tires more than 2.25 and 600 grams is not "XC".