Originally Posted by
aniki
Quite frankly it's very difficult not to make fun of your fit when by inference, you're making fun of everyone else's.
I can safely assume that you're the only person in this thread who modifies and rides a 'racing bike' to become some kind of 'shopping' bike or town bike while I also make the assumption that everyone else on this thread including me has a position more akin to the person you're calling mr. arched banana back.
Yet you've said that you can only ride for an hour and half before you get a sore butt (not that that surprises me at all as you clearly have far too much weight on it) whereas I, and no doubt all those who adopt the same position as mr. arched banana back can ride 6, 7 or 8 hours in a day without any butt soreness at all.
I don't think we've got much chance of 'seeing' your set up in action but maybe you can publish some garmin stats or show us some strava screenshots and we can see the phenomenal power you're able to produce with this 'optimal' position....
Quite frankly, i don't give a sh*t what you think of my fit.
With the exception of cube wheels, I haven't made fun of one single persons fit on this forum. Even in his case, I was being very constructive and understanding that his choices are limited and he is making due based on what he has and his proportions, respectively.
From a postural perspective, an arched lower back is terrifyingly bad news. Unfortunately it would be wise to compromise your racy leaning forward position somewhat so you can keep your back in a more or less natural posture.
I am not here to argue whether such a leaning position is or isn't effective. I am certainly not here to judge other people's fit or criticize them directly because their opinion does not directly coincide with my own ideas. Shame on you for not doing the same.
When you ride your bike, assuming your stabilizer muscles are all engaged properly and keeping everything tight, you should feel like you are bang on centre. You should be able to easily weigh your
front OR rear axle effortlessly, at any given moment of your ride, without ever feeling like there is too much weight positioned back or forth.
Originally Posted by
cubewheels
If you can measure your knee bend angle from straight at the 6 or 5 o'clock position, it should be within 25 and 35 degrees at your preferred feet position on the pedals and your preferred toes down or up angle. YOu can take picture of yourself on bike and measure the angle on the picture.
Mine is 30 degrees in toe up feet (heel dropped) position. 30 degree knee bend is very common setting. But how it affects your pedaling efficiency is the final verdict. Bouncing at high cadence (~100rpm) is definitely not good.
Bouncing can be alleviated with some mindful motor skills and keeping the weight of your butt off the saddle when you are sprinting.
According to the heel to pedal method of measuring leg extension, I am bang on perfect. (note, my inseam is about 34.8 inches and I ride with 175mm cranks) . I digress.
Try a frame your size.
Originally Posted by
base2
Just edited to add "individual proportions" to above post.
I have long monkey arms for example. At 6 foot tall and a 31.5 inseam, I am all torso & arms. All my bikes are 58's The proper saddle placement for balance for you, on your bike would obliterate my wrists & shoulders/neck in short order.
In isolation, moving the saddle back, or moving the bars away effect the same result: Less weight bourne on the hands/wrists/shoulders/neck muscles.
Here is my nearest equivalent fit to the OP that I owned & built before I donated it to a local bike co-op charity for auction. I used to ride it on the Lake Washington loop & do 30 mile trips to Ballard for craft beer inspection & testing.
20190330_180742 by
Richard Mozzarella, on Flickr
You'll notice how far the bars are away, in comparison to how much the OP's arms are holding up his torso in the photo he provides in post number 1. One of us will be way more comfortable on much longer rides.
Again, its not exactly the same thing. Moving your saddle back will bias more weight towards the rear of the bike. Moving the bars away from you will bias more weight toward the front of the bike.
Therefore, your body is not balanced or positioned identically in either circumstance;
Not the same thing .