Which Miche cranks?

Crank nerds, your help is sought. EDIT: Thanks for all responses so far.

Having recently snapped a Primato (drive side). I'm looking for some advice about Miche cranksets. The Xpress seems to have been retired, leaving the Primato, the Pistard 2.0 and the Pistard Air. Which is best?

EDIT: All are constructed from the same aluminium (6082), in varying weights, with the Pistard 2.0, at 680g, 80g heavier than the Primato's 600g per set and the Ai 120g heaviest (at 720g per set). If total weight including BB is considered, Primato's lighter weight will be somewhat offset by its heavier square taper unit.

From the Miche UK site:
Miche's new range of ground breaking track chainsets. Pistard 2.0 and Pistard AIR. Building on the many decades of success of the Miche Advanced track chainset, Miche's engineers set themselves the challenging task of improving this legendary track chainset.
By moving from the traditional square taper bottom bracket to the new Miche EvoMax integrated axle they were able to improve the stiffness of the chainset by over 25%, the chainset stiffness has been further enhanced with the new profile crank arms. This fundamental change in the chainset design had set Miche's Italian engineers two major challenges.
Keeping the crank arms Q Factor as "low" as possible
Maintaining the correct chainline
The new innovative design maintains the same chainline as the previous Miche Advanced chainset and sees only a small increase in the Q factor from 131mm to 138mm, one of the best in the industry for a integrated axle design.

EDIT: Prices vary greatly. Pistard Air is generally highest but it's easy to find the black Primato at around the same price. My four questions: Of the three available Miche cranks, which is the strongest, which is best (and why?), which is the top of the range?

Remember that the Primato needs a square taper BB which is a lot heavier than a HT2. I’ve got a ti BB on order to try and mitigate the issue somewhat. #WeightWeenie4life!

Edit: can’t you just make a warranty claim?

The Miche website says all three cranks are AL 6082 and the chainrings are 7075

yet this lower grade aluminium is softer and more prone to shearing than that used in the Primato.

citations needed

Thanks @bjf and @hullian, both points appreciated. @bjf, I don't want another Primato if there's a stronger alternative, basically.

I might be wrong, but crank failure is more likely to be due to a crash, knocks, poor pedalling tecnhique and/or manufactoring defects rather than torquing too much with your strong handsome engine legs.

TLDR; if you've snapped that crank, you would probably snap most. There are certainly stiffer cranks out there but the shear thresholds are usually way beyond what humans can achieve (if anything, due to safety liability).

Thanks @BATT, these wizened sticks are unlikely to torque very much. I've been cycling for 40 years and never damaged, let alone snapped, a crank yet, e.g.: Sakae, Suntour, Simplex, Nervar, Sachs-Huret, FSA, Exage, Deore, XT, Sora, 105, 600, Dura-Ace, Record etc etc.

No crashes or knocks in this case, my first Miche. There are quite a lot of stories out there of Primatos snapping without prior misuse or accident, as there are of many cranks. I'm sure at least some of these were cracked before snapping, as mine may have been (though no hairlines were visible). I'm not sure all will have been, as it's possible manufacturing may have played a role.

This leaves me wondering which Miche cranks are strongest, which are the "best" and why, and which are top of the range?

See Hullian's point above.

Why are you so set on replacing with another set of Miche cranks?

In the event that Miche offer me a replacement, I'll take best thing they have.

I wold have thought they'd offer a like-for-like replacement, if at all. Where did you buy them?

Ah makes sense.

I've heard of and seen several Primato advanced cranks developing a crack and found a crack on mine too recently. Took them of before they snapped. The crack is usually behind the driveside arm, like this, not my picture.

I've had an Andel crank snap too though.

@Samuli Interesting. Any impacts or crashes before this appeared?

my (second-hand) primato cranks cracked in a similar way. I figured it was the fatigue of being repeatedly taken on and off the spindle – torqued and untorqued. but i'm sure someone with a better understanding of materials science/engineering will be along to tell me that's bobbins.

I’ve cracked a whole Miche crankarm. I’m considering getting an NOS gold Miche for a future bike because I’m tired of staring at the iso bb I’ve had for over a decade.

Can't remember anything in particular. It had been in daily use for three years.

Here she is.

1 Attachment

https://www.lfgss.com/conversations/290595/#comment13130083

Blimey! Cheers @sergioflorez