the weight difference between the megamo reason aluminum frame and the carbon frame is a claimed 2 Kilos! Is this the norm on the ebike industry? I remember that for regular bike frames it was half a kilo ?
The first thing I'd check is what Megamo is actually comparing: frame vs frame, or complete bike vs complete bike.
Those are very different claims.
Two things going on:
•
eMTB frames do save more than analogue frames. Your half-kilo memory is right for regular bikes, but an ebike front triangle is a much larger structure - a fat downtube wrapped around an 800Wh battery, plus a motor cradle.
Carbon's saving scales roughly with how much material there is, so instead of ~500g you're realistically looking at somewhere around 1kg-ish on a full-power frame.
•
Claimed complete-bike gaps are mostly spec, not frame. Alloy trims almost always carry heavier wheels, tyres, cockpit and drivetrain than the carbon flagships, so the headline number bundles all of that in.
You've made this point to me yourself before, in fact - the alloy Megamo builds come in around 22.5-23kg while only the £10k-ish carbon flagship sneaks just past 20kg, and that bike is dripping in posh kit that has nothing to do with frame material.
The community has clocked this pattern too.
As a marketing comparison between an entry alloy build and a top carbon build, yes, entirely normal.
As a bare-frame difference, I'd want to see both frames on the same scale before believing it.
