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That is interesting.
Realised the other day that my Speedplay cleats were slammed in the wrong direction, i.e. putting my foot as far out as possible rather than inwards...
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You mean crank arm?
If that hits first, you can mill bits off it. Eventually you get to the point where your pedal axle is poking out of the back of the crank. I'd like to do shorter threads, I think large diameter (like FC-7300/PD-7300 but without the bearing-in-crank thing) would keep the stress within reasonable bounds with a 10mm thread engagement, which is about 4mm less than we use with 9/16×20, so 125mm Q looks feasible. Custom pedal axles and custom cranks - only rich people need apply :-)
1 Attachment
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like FC-7300/PD-7300
How would you wrangle modern pedals in there? Machine an adaptor?
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Machine an adaptor?
No, because you'd still have to make room for the ~14mm length of 9/16×20 thread. Making new axles would be the key, just copy the shape as far as the inboard seal ring and then flare out to the bigger flange and thread.
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Is that a real project? It still surprises me that in the years since the zipp vumachrono we haven't had anything much happening in the aero crankset world. I think there is a gap in the market for some very thin metal cranks to fit in a powermeter spider.
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Is that a real project?
No, it's just CAD practice. Since the VumaChrono we've had Vision Metron and Campag Bora/Bullet, neither of which has exactly flown off the shelves, plus the Look Zed track crank.
Within the constraints of pedal axle support and chain clearance on 11-speed bikes, there isn't really a good reason to try to make skinny cranks. If you go too thin you lose stiffness fast, the limiting load is torsion and to a first order approximation that's proportional to the fourth power of the minor axis. 15mm thick is where we are now, if you went to 12mm you'd have to double the major axis and then you'd be at >6:1 chord:thickness and the UCI would start moaning
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Still it would be cool to have cranks like these Burrows ones:
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Got the cable routing for the TriRig nice and neat though:
What's that? Nokon?
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POWER CORDZ™
Have fun routing the cable through that centre hole.
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Nokon?
Looks more like Alligator i-Link
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centre hole
So that's what it's for!
POWER CORDZ™
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Alligator i-Link
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What you do is get a load of scraps from @amey for a fiver... I have spare segments but no end caps which is what you need.
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Needs scoblebricks™
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Slightly better picture #notprolly
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After many years of riding track bikes, I finally took this one indoors
There were a few other red Cervelos
In aero news, picked up my Viewspeed skewer:
Turkish
Howard
gbj_tester
Scilly.Suffolk
specialist
skinny
amey
BareNecessities
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About
upsidedown's TT bike
Posted by
@umop3pisdn
I've been looking at how low you can go on a T3. Seems like the pedal axles start hitting the chainstay when you get a to a Q of about 132mm.