Hillclimb Bikes

See if they explode this weekend first

Less likely to snap those, I suppose

Nice

Saw that he’s been winning hill climbs on a steel bike with Etap and a DA7800 crank.

With a massive saddle to bar drop, and a forward facing seatpost. Think he's a tip for the 2020 national.

Aren’t those string spokes going to be mega low modulus, i.e. you’ll have to stretch the living **** out of them before there’s enough tension on them?

Can’t help feeling that for the strength you actually need, you could use a much thinner UD carbon bootlace and you’d have both weight and cross-sectional area (=aero) on your side. If UTS of a steel spoke is let’s say 550MPa up to maybe 750MPa, UD strength of a strong fibre like T1100S is pushing 3700-3800MPa in the right resin and stiffness will probably be about the same as the steel.

Equivalent of a 1.4mm butted steel spoke would be a 0.3mm carbon bootlace, which would look a bit scary, but that’s basically what it would be!

This is the hillclimb bike thread, get out of here with your actual engineering know-how and come back with a drill.

Not 2019?

It's some long one isn't it? Calum's a short duration smasher I thought.

Something ridiculous like 13.5w/kg for a minute...

Yep, 5km @ 5% - can’t wait! My power-to-weight curve is wack for 2 mins and less.

You’d be good at this years course no? Big engine but a lot lighter than most testers.

Maybe, but not when I have 130 miles on a bike clocked on Strava this year.

Long as that’s all hill reps you’ll be grand 😉

Yeah a total machine at the short sharp stuff. Averaged 930W for 1m18 on Swain's last year IIRC.

He just got a new 30 second power PB - 1238w!

That is just outrageous...
A shame that he wasn’t scouted for track when he was younger, his power has got to be up there for track sprints and Kilo.

wat

Blimey, the concept of those string spokes is wild (says someone with no engineering knowledge at all).

Think he’s only been riding a few years.

He was a strong decathlete/heptathlete, so probably the right buildup of muscle fibres/build for huge sub 1:30 power.

That's nuts.

I’ll be honest, when I heard what he was doing on the short stuff I thought he was a kilo rider.

Any interest in two carbon saddles?
My days of pretending I was good are done, my days if pretending I'll get back to pretending I was good are also done.

Can't remember their mass, but they're a good quick mass saver.

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Yes please

To you: free.