BC40

No Trail Unturned

  • INSPIRED BY THE FINEST SINGLETRACK IN AMERICA.

    Endless singletrack in our backyard to ride every day of every month, come rain or shine. Defining direction, informing efficiency, dialing fit and feel, refining responsiveness, testing, and finishing to completion. Meet the new, incomparable BC40.

SRAM XX SL Eagle Transmission Bike

BC40

SRAM XX SL Eagle Transmission Bike

$12,730

SRAM X0 Eagle Transmission Bike

BC40

SRAM X0 Eagle Transmission Bike

$8,890

SRAM GX Eagle Transmission Bike

BC40

SRAM GX Eagle Transmission Bike

$6,935

Shimano XT M8100 Bike

BC40

Shimano XT M8100 Bike

$6,670

Shimano XTR M9100 Bike

BC40

Shimano XTR M9100 Bike

$8,360
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BC40 Frameset

BC40

BC40 Frameset

$4,000

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Kate Courtney BC40 2025

FAQS

See exploded view HERE

Lighter and Stiffer

The BC40 is now 100g lighter than before. In fact, by optimizing its carbon laminate schedule to carve out any excess weight, we’ve made the frameset stiffer all around, too, without sacrificing any of BC40’s renowned strength. That means all the power you’re putting down gets into the ground as you fly up the climbs.

Lightweight BC40 on path

Lighter and Stiffer

The BC40 is now 100g lighter than before. In fact, by optimizing its carbon laminate schedule to carve out any excess weight, we’ve made the frameset stiffer all around, too, without sacrificing any of BC40’s renowned strength. That means all the power you’re putting down gets into the ground as you fly up the climbs.

Bottom Bracket and Main Pivot Upgrades

Along with the laminate optimization, we’ve made some behind-the-scenes upgrades to the BC40 bottom bracket and main pivot. Both changes involve co-molded aluminum parts that ease maintenance and increase durability. The new bottom bracket allows easier access for cable routing - a boon to home and shop mechanics alike.

Detail shot of BB

Bottom Bracket and Main Pivot Upgrades

Along with the laminate optimization, we’ve made some behind-the-scenes upgrades to the BC40 bottom bracket and main pivot. Both changes involve co-molded aluminum parts that ease maintenance and increase durability. The new bottom bracket allows easier access for cable routing - a boon to home and shop mechanics alike.

Chainguide

The BC40 gets its long awaited chainguide. It’s a small thing, but it makes a big difference. While clutch-type derailleurs and narrow/wide chainrings do an admirable job with chain retention, sometimes one needs that little bit more confidence. This chainguide bolts right to the existing receiver on the pivot axle. Max 34t chainring.

Chainguide

Chainguide

The BC40 gets its long awaited chainguide. It’s a small thing, but it makes a big difference. While clutch-type derailleurs and narrow/wide chainrings do an admirable job with chain retention, sometimes one needs that little bit more confidence. This chainguide bolts right to the existing receiver on the pivot axle. Max 34t chainring.

Ultralight DUET Bar/Stem

DUET is a handlebar and stem system that rivals or betters the weight of most one-piece cockpit systems, yet you still get the adjustability of a traditional two-piece system. Both bar and stem are among the very lightest in the market. The 780mm DUET Handlebar paired with the 50mm DUET Stem totals a scant 199 grams.

Ultralight DUET Bar/Stem

Ultralight DUET Bar/Stem

DUET is a handlebar and stem system that rivals or betters the weight of most one-piece cockpit systems, yet you still get the adjustability of a traditional two-piece system. Both bar and stem are among the very lightest in the market. The 780mm DUET Handlebar paired with the 50mm DUET Stem totals a scant 199 grams.

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