Rainbow_Warrior wrote:
ericMPro wrote:
hi, thanks for reaching out.
Your numbers of 400 and 670 are a red flag of sorts... it's an unorthodox result from a fit session, as you've seen from noticing you're off the fit charts. I'd like to see some pictures to be sure.
Furthermore, I'm not sure what a "long distance comfort setup for Ironman" means, but for me, the most comfortable position is also the most powerful and most aerodynamic, so I'm leery about how things are going to end up for you, especially given the unorthodox starting point in the fit process that outputted you a pad stack of 670mm and a pad reach of only 400mm. For example, the previous poster was 5'2" tall and had a pad reach of 440mm. Something isn't adding up here.
Something that is sticking out in the hard data is a saddle setback of 123mm. Is this to middle of saddle or the nose? For most triathlon applications something close to zero setback is the starting point, and then you go from there. What saddle were you on? If you move your saddle forward 100mm and your front end 100mm to match you're at a stack of 670mm and a reach of 500mm, something much more expected for somebody of your height.
Circling back to the "comfort" issue, if Ironman is your favorite race distance and use case for the future bike, the P3x or PX are absolutely good choices as they integrate storage and hydration much more aerodynamically and holistically than the P5d. Something to consider.
Anyway, we need to confirm some things before we even start the process here... what saddle were you using, why was it so far back, why are you so upright, why philosophically is "comfort" leading you and your fitter to an unorthodox position? I'm guessing that because you only have a road bike so far you ended up with a road bike position on the fit bike. Let's figure out the basics and then go from there.
Make sense?
Eric
Dear Eric
Many thanks for the quick feedback, it is much appreciated.
The saddle was a Selle Italia Iron Evo, size small. The setback of 123mm is from the middle of the saddle, or what Selle Italia calls the BRP "Biomechanical Reference Point"
.
The fit was made with Selle Italia's IDMatch system (
link) - you're pedalling on a smart bike in front of a camera, and their software is making live adjustements while you're pedalling. There is an "advertisement"
video on GCN's Youtube channel for details.
The software has a dedicated triathlon module, where you can choose between the olympic distance or the ironman setup. I chose the latter, as I plan to do my first IM in 2021 and wanted rather a "confortable" position than a full aero/aggressive position (knowing that I can tweak the position if I want to get more aero/aggressive). In my understanding the Ironman position of the software is more confort orientated and upright than the OD.
I don't have pictures, but I can provide angles that where measured during the fit (see below).
I noted your suggestions regarding the P3X, but I am also considering the "budget" version P Series, what do you think of this bike from a bike fitting point of view?
So far I think that I will keep doing OD's, Sprints and 70.3 rather than IM's with the bike I am looking to buy. The IM will probably be a one shot. I am doing Sprints and OD's on my Canyon Endurace with clip-ons since years.
Okay. This is an amazing post, and probably deserves its own thread, but I'll tackle it here.
First of all, before we dig into the meat of the post, a P-Series bike is just as adjustable as a PX or P3x or P5d. If you have good position coordinates you'll be just as happy on a P-Series.
As for the rest, there's a lot going on here.
Basically you are going about it all wrong, exactly backwards. You are choosing a bike position based on a saddle, rather than choosing a saddle (from all of the several saddle companies) based on your body in a proper time trial position. Next, you are making a false choice between "aggressive" (no such thing) and not aggressive. Finally, you're making a false choice between "styles" of position, based on incorrect or outdated notions.
Again, your fit is an output of a dynamic and interactive process, not predetermined by an input on a computer. Your position numbers are the output of a process, and should not be determined by any preconceived inputs. A dynamic fit bike is a blank slate, you work it like you would the rig at an optometrist, better or worse, as many iterations as it takes until you find the optimal position, optimal being comfortable, powerful, and aerodynamic.
So, given all those bad inputs and backwards processes, you outputted fit numbers that are off the charts as we've already talked about. Not surprising, very unorthodox process. If you made a purchase decision based on that, you'd be on the wrong size bike altogether.
For example, look at the picture. Does that look like a time trial position or a road bike position? Hint, it's a road bike position. The bike in the picture is even a road bike with clip-ons.
I think the first step before buying a bike is getting a proper fit on a dynamic fit bike by a reputable fitter (using a good fitter-athlete dynamic and process), or get a good remote fit by an online fitter. Where are you located?
Eric
Eric Reid
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