Some pics in this thread show something else but square taper. Never seen this hexagon axle profile before.
Also worth mentioning is that not only the bb axle length is of interest but the offset aswell. They are not all symmetric. It will influence your chainline and chainring/frame gap.
alcatraz wrote:Alloy m8x1 bolts on cranks?
Never seen this hexagon axle profile...
The seller specifically says to use steel fixing bolts to install cranks and then switch to the included alloy.
The hexagonal profile is for Tunes "sixpack" BB
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If you've ever ridden a Brompton folding bicycle, you may know why they're jokingly called "bomptown" - basically it's super cushy, wonky, and while efficient it can feel like you're riding a clown's bike.
So on a really cushy feeling, twitchy, small-wheeled bike would anyone notice the stiffness of a crank? Nope.
Stiffness of the crank, then, is not a priority in any way for a 'bomptown' build.
glepore wrote:At some length they probably get very flexy/break prone. My original toplines had pedal holes that were solid in the back, as many of the early ones fractured there. Precludes the use of pedals without flats.
At my weight (58 kg) they were fine. Bigger guys that aren't spinners might beware. Not sure what spindle length will be needed, I think i used 109's with mine that were originally mtb cranks (done that way to get the 110 bcd, q factor be damned).
That’s a good point - me, at 110kg, and you using the same cranks is just silly - and I would imagine Shimano have built them stronger rather than weaker so you would be fine on these. Don’t think I’d trust them through...
The pedal threads look huge though?
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