madm3chanic
100 W
i have had great fun and learnt heaps tonking around on my old 4080 hub motor build, but its time to start playing with the big boys
i have all the parts, the design is finished, building started today! she's using an Astro 3220 with a Tangent Drive gearbox; 32ah of lipo @52v; a castle creations 160A fan cooled ESC and a CAv3 with the grin tech thumb throttle.
im using a custom-valved Avalanche Woodie 3.5" stroke rear shock, Fox 40's with again a custom Avalanche re-valve kit, big fat 42mm 26" rims front n back with a 150mmx12 rear wheel custom-made for me by the lovely chaps at municycle.com, 3" spikey rubber, ill be running two-speed to the rear (geared to 55 and 80km/hr) assuming it is reliable enough (single speed if it isnt); iv got fan cooling on the batteries; solid wratchetting driveside cranks by trialtech.
the frame itself is a concentric BB pivot design (im using two monster sealed bearings pivoting around a 100mm titanium bottom bracket shell) with a fairly linear linkage-driven rear shock, topping out at 8" of travel on the 3.5" stroke shock. using what i learnt from my last build, the geometry is more aggressive than the last frame; lower bottom bracket, lower center of gravity (the CoG is roughly between the riders' shin level and dead central to the bike, horizontally), shorter chainstay length, but with the same reach and head angle. iv got a taller stack height thanks to 2" 800mm wide rise bars but a lower standover height.
today i made the big monocoque chainstay yoke for the swingarm, and the dropouts. check out these babies-
although i will be using a rear deraileur (of sorts), i made the dropouts to accommodate single-speed setup without needing chain tugs to keep the rear wheel in place. they took a lot of effort to make, i hope they work as well as i imagine they will
i have all the parts, the design is finished, building started today! she's using an Astro 3220 with a Tangent Drive gearbox; 32ah of lipo @52v; a castle creations 160A fan cooled ESC and a CAv3 with the grin tech thumb throttle.
im using a custom-valved Avalanche Woodie 3.5" stroke rear shock, Fox 40's with again a custom Avalanche re-valve kit, big fat 42mm 26" rims front n back with a 150mmx12 rear wheel custom-made for me by the lovely chaps at municycle.com, 3" spikey rubber, ill be running two-speed to the rear (geared to 55 and 80km/hr) assuming it is reliable enough (single speed if it isnt); iv got fan cooling on the batteries; solid wratchetting driveside cranks by trialtech.
the frame itself is a concentric BB pivot design (im using two monster sealed bearings pivoting around a 100mm titanium bottom bracket shell) with a fairly linear linkage-driven rear shock, topping out at 8" of travel on the 3.5" stroke shock. using what i learnt from my last build, the geometry is more aggressive than the last frame; lower bottom bracket, lower center of gravity (the CoG is roughly between the riders' shin level and dead central to the bike, horizontally), shorter chainstay length, but with the same reach and head angle. iv got a taller stack height thanks to 2" 800mm wide rise bars but a lower standover height.
today i made the big monocoque chainstay yoke for the swingarm, and the dropouts. check out these babies-
although i will be using a rear deraileur (of sorts), i made the dropouts to accommodate single-speed setup without needing chain tugs to keep the rear wheel in place. they took a lot of effort to make, i hope they work as well as i imagine they will