Chris Currie's heavenly trail bike concept comes closer to reality with this 150mm travel trail bike that's both bullet- and future-proof.
in 2020, but to fully appreciate what they’re doing with their own brand, we need to step rewind a bit.for us all the way back in 2015 , before Boost axle spacing was ubiquitous, but he’s been working on it since 2004. The concept is simple enough: Create a long travel bike with modern geometry that can’t bob AT ALL on climbs, regardless of the rear shock’s setting.
His anti-squat figures are based on a realistic rider+bike center of gravity point of 1150mm above the ground, and calculated when riding a 32-tooth chainring and the 50-tooth cog. Pretty much the exact steep climbing, grinding gear combo you’d want anti-squat in full effect to prevent pedal bob as you slog up the climbs. And they say it does this without creating undue pedal kickback.
Rather than the original shock-mount flip chips, Trail Dropouts and Warp Speed Dropouts tweak the head angle, seat tube angle, and BB height. Here’s his descriptions:are 435mm, maximize maneuverability, create a 65° head tube angle, 77.7° seat tube angle, and low but not extreme 30mm bottom bracket drop.are 445mm for maximum stability at speed, create a 64.5° head tube angle, 76.
The frame uses “full perimeter lap joints” to create a single, hollow form on the front triangle. Seat tube and head tube cups are then fully sleeved and bonded into the frame for maximum strength on high-stress areas. This construction method also eliminates warping from welding’s heat, so they say the frames are perfectly aligned, too.The main pivots are 15mm axles using common bearing hardware.
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