Start your dream mountain bike build with BC40’s frameset. It’s the perfect canvas to create your one-of-a-kind ride with custom components and head-turning custom paint.

Carbon frame
120mm rear travel
Spec to suit

RACE-DAY LIGHT, PLAY-DATE READY

Inspired by the rocky surfaces, dynamic corners, and punchy climbs of our legendary Back 40 trail, BC40 is a second-to-none, modern XC racing bike with legs to take on much bigger trails. Its lightweight, high-performance carbon frame and progressive geometry deliver fast accelerations and race-day sharpness. Its World Cup talent extends to the 120mm suspension travel that also sets it up as a do-it-all weekend trail sled, delivering uncanny levels of control and confidence beyond its category.

Fork	120mm / 530 Axle to Crown
Front derailleur	-
Rear derailleur	UDH Compatible
Shift levers	-
Cassette	-
Chain	-
Crankset	Boost Chainline
Bottom bracket	73mm Threaded
Brakes	Post Mount 160
Handlebar	-
Handlebar tape	-
Stem	-
Saddle	-
Seatpost	31.6 or 30.9
Wheelset	-
Tires	29x2.4 max

Geometry

For optimal performance and control on fast and technical tracks, BC40 uses a slack head tube angle and a long front-to-center measurement. The result is geometry that positions the rider further behind the front wheel for world-class ride quality and predictable handling, no matter how hard you push it.

All units are in Millimeters or Degrees

	SM	MD	LG	XL
a Stack	598	609	622	633
b Reach	420	445	475	501
c Effective top tube	569	596	630	659
d Seat tube length	395	420	450	500
e Head tube length	95	105	120	135
f Head tube angle	66.5°	66.5°	66.5°	66.5°
g Seat tube angle	76°	76°	76°	76°
h Bottom bracket drop	40	40	40	40
i Chainstay length	435	435	435	435
k Wheelbase	1145	1174	1210	1241
m Fork rake	44	44	44	44
n Front center	710	739	778	806
o Wheel size	29	29	29	29

Kask Protone Icon EWG11

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