#1




Stupid top tube tricks
Just wondering. Seems my favorite top tube measures happen to be right at my height divided by pi. Yep, height divided by 3.14159.
Just wondering how many other folks this happens to work for. Now as an aside discussion it was not far from the square root of 10, but in the end seemed to be much more aligned with pi. So height divided by pi, does it work for you or not? Then there is the height minus inseam times .6 for top tube. Same result actually. So what say you? 
#2




Both don't work for me.
First calc leads to 54cm which is one cm off, I prefer a 55cm. 2nd calc leads to 51cm which is way too short. 
#3




Yuuuuuppp
165" /pi = 52.5, my desired TT 
#4




Doesn't work for me (gives 58 cm vs. 5556 that I prefer).

#5




I'm 179cm/Pi= 56.979
I ride a 56cm Cannondale Supersix I'm looking for a used Time RXRS and LBS tells me I'm Medium though according to your formula I'd be a Large...? 
#6




Didn't think this had a chance considering my height & torso to leg length ratio, but:
195.5cm / Pi = 62.2cm I run a 62 TT. Wow ! 
#7




Quote:
5'11" (71")  32" = 39" x 0.6 = 23.4" how to convert back to cm? 
#8




23.4*2.54=59.4cm
Of course height divided by pi would be a different number in your case 57 cm. For what its worth, I did run into a custom builder who said a shortcut to get close he usually divides height by 3.1 which works for most people. So probably just a coincidence, but it isn't far off for a good many people. Though clearly not everyone. 
#9




It's came out a little longer than I ride, but I also use a 130mm stem so it is well within reason.

#10




First thing I thought was, "God, you guys are geeks". Then two seconds later I was curious and was punching in number on my iPhone calculator.
As for the formula... Pretty damn close for me.
__________________
I'm riding to promote awareness of my riding 
#11




Stupid top tube tricks

#12




Hmmm, mine falls right on the money at 62.6.
William 
#13




Tt
Mine is spot on. 57.8 result and my bikes run TTs between 57.5 and 58.5. WoW!

#14




Just being lazy, it actually turns out to be 59.436 cm, off by more!

#15




pretty cool but off by 30 cms haha

Thread Tools  
Display Modes  

