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Postby warthog1 » Fri Sep 14, 2012 10:36 am
Postby whitey » Fri Sep 14, 2012 11:43 am
Postby Nobody » Fri Sep 14, 2012 1:37 pm
warthog1 wrote:I have a 53-39 crankset with longer arms I want to install...
What was really interesting, however, was that, while peak power was not different, the time required to achieve peak power was much lower with the 170 mm (2.57 s) than the 175 mm (3.29 s) cranks.
This has significant practical applications. The shorter cranks permitted you to generate high power outputs faster. This ability is critical in closing a gap, accelerating in a sprint, and also laying out that massive and quick burst of power to get you over an obstacle on the trail or out of a turn in cyclocross.
Postby Nobody » Fri Sep 14, 2012 1:44 pm
I all else fails, an angle grinder should do it.warthog1 wrote:...but I can't get the old one offI have the bolt and lock nut undone but the crank seem to be an interference fit and wont budge
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Postby warthog1 » Fri Sep 14, 2012 2:25 pm
Nobody wrote:warthog1 wrote:I have a 53-39 crankset with longer arms I want to install...What was really interesting, however, was that, while peak power was not different, the time required to achieve peak power was much lower with the 170 mm (2.57 s) than the 175 mm (3.29 s) cranks.
This has significant practical applications. The shorter cranks permitted you to generate high power outputs faster. This ability is critical in closing a gap, accelerating in a sprint, and also laying out that massive and quick burst of power to get you over an obstacle on the trail or out of a turn in cyclocross.
http://www.pezcyclingnews.com/?pg=fullstory&id=8845
Postby Nobody » Fri Sep 14, 2012 7:09 pm
http://forums.cervelo.com/forums/t/10737.aspxNow I'm having trouble getting the sram S900 to fit. Can't seem to get the spacers right.
Postby warthog1 » Fri Sep 14, 2012 11:38 pm
Nobody wrote:Good to see you've almost got a result.http://forums.cervelo.com/forums/t/10737.aspxNow I'm having trouble getting the sram S900 to fit. Can't seem to get the spacers right.
http://www.sram.com/sram/road/products/s900-crankset
At $300 I hope it gives you more than just a few seconds. But I suppose with a bike like that you can't just put any crankset on it.
Oh the pain of owning and S5.![]()
Postby Nobody » Sat Sep 15, 2012 6:46 am
Well as counter intuitive as it is, if I was riding a lot of hills (and could still maintain cadence in bottom gear) I would get a standard too, as bigger chainrings are more efficient. Since I can do my current rides in the big ring, the inner ring is just there for when road/path circumstances force me to go slow.warthog1 wrote:I didn't like the way the compact shifts, and shorter crank arms suck
http://www.cyclingweekly.co.uk/news/lat ... -bbar.html“I use short cranks, 165mm, which is also against current thinking — people say you should have cranks matched to your leg length. My theory is that it is lighter, stiffer and more aero, and it operates your legs over the more efficient portion of the stroke, so you can optimise your saddle height.”
Postby warthog1 » Sat Sep 15, 2012 9:48 am
Postby Nobody » Sat Sep 15, 2012 1:02 pm
Postby warthog1 » Tue Oct 23, 2012 12:57 pm
Nobody wrote: I'll be interested to know the difference.
Postby Nobody » Tue Oct 23, 2012 5:18 pm
Postby warthog1 » Tue Oct 23, 2012 9:31 pm
Postby Nobody » Tue Oct 23, 2012 11:22 pm
Postby Dr_Mutley » Thu Oct 25, 2012 2:25 pm
Postby warthog1 » Sat Oct 27, 2012 6:21 pm
Postby warthog1 » Sat Oct 27, 2012 6:35 pm
Nobody wrote:Alex posted the below document in another thread.
http://www.plan2peak.com/files/32_artic ... hnique.pdf
Pages 4 to 6 basically says crank length doesn't do much for max power.
A graph at the end of page 5 says I'd be better off with 160s for max power. I'm on 165s, so close enough.
Postby warthog1 » Sun Oct 28, 2012 8:55 am
Dr_Mutley wrote:warthog...
ive just gone thru this exact same process with my S5 VWD.......
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