IronEcho & Monolitr
IronEcho IronEcho
Monolitr Monolitr
IronEcho IronEcho
Monolitr, I've been chewing over a custom frame that can haul insane loads—think a bike that can tow a 1,000‑pound sled uphill. Your strength training is top notch, so maybe you can weigh in on how to balance raw power with frame rigidity. Let's swap some numbers and see how we can build a beast that runs and lifts.
Monolitr Monolitr
Build a chassis with a double‑tube backbone made of 4130 steel, 1¼” walls, 6‑in. spacing – that gives the rigidity you need for a 1,000‑lb sled while keeping weight down. Use a 10‑bar front fork and a 12‑bar rear triangle to keep bending in check. For the motors, a 1.5‑kW torque motor gives you about 1,200‑lb pull at 30 mph, and pair it with a 3.5‑ton gear reducer – that’s 4,200 lb of static torque. Keep the battery pack under 600 lb so you don’t overload the frame. Add a 12‑in. rear track and a 14‑in. front track to spread the load. Tighten everything to 80 lb, use 10‑mm bolts, and remember: every extra inch of stiffness costs weight – balance it against the strength you need. Push the limits, but never let the frame buckle.
IronEcho IronEcho
That’s a solid blueprint, but remember the 600‑lb battery is still heavy. Consider swapping out some steel for titanium where it really matters, like the swingarm. It’ll shave off a ton and keep the center of gravity lower. Also, 80‑lb torque on every joint is aggressive—do a quick dial‑in test before cranking the motors. Don’t let that frame start whining. Let's get this beast off the ground.
Monolitr Monolitr
Switch to titanium swingarm, keep steel where shear matters, but be careful on welds – titanium needs clean prep, or you’ll end up with a weak spot. Run a static load test on the frame first, lock in the joints, then crank the motors. Keep the battery under 600 lb, and when you’re ready to hit the road, remember: form over ego. Let's crank it out and make that beast roar.