I personally wouldn't mess with it that close, it is what it is. I would really base it on comfort at this point. If you are comfortable and can hold the position for the full distance, you will come out faster than if you change things up and can't hold it, even if the new position is faster when you are in it. If you are not comfortable right now that is a different question, some small changes could achieve that fairly quickly with little adaptation required.

Per above, I would not change it at this stage in the game. But that can also depend on your performance level and how far off you might be from an ideal fit.

My N=1 experience: I bought my first tri bike just 3-1/2 weeks before my first HIM in April. Prior to that purchase, I had primarily ridden my 30 year old road bike on an indoor trainer. I had a few test rides on a borrowed 15 year old tri bike that was one size too small for me-- this bike convinced me to invest in my own tri bike for the race. I rode NOLA 70.3 on a brand new bike in a brand new position faster than my expectations, considering the conditions and only 4 months total of bike training.

Assuming the changes are not radical, four weeks is plenty of time to adjust to a new fit.

I'd highly recommend it if you are adjusting your fit to address soreness/injury/discomfort. If you're just trying to get lower/faster you run the risk of the new position not working out (needing some additional tweaking), so wait 'til post-race.

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ECMGN Therapy Silicon Valley:
Depression, Neurocognitive problems, Dementias (Testing and Evaluation), Trauma and PTSD, Traumatic Brain Injury (TBI)

More to try and putt the watts to better use than soreness. Based on what I see others doing on similar setups at similar watts, I think I am giving away some speed somewhere.

Longest training ride has been a hair over 6 hrs and no discomfort so I'm good there.

Based on the opinions so far it looks like just running it the way it is now and tweaking post race is the best course of action.

Would still love reccos for San Diego area fitters

Yeah, if you're comfortable as-is and looking for a new fit to increase wattage definitely hold off.

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ECMGN Therapy Silicon Valley:
Depression, Neurocognitive problems, Dementias (Testing and Evaluation), Trauma and PTSD, Traumatic Brain Injury (TBI)

If you don't have major discomfort I would get a fit after the race.

I don't know of any fitters in San Diego, you are within driving distance of ERO sports in the LA area. I get all my fits done by Jim who posts here on slowtwitch. He's fit me to my road, cross, mountain and tri bikes, Last time I talked to him he mentioned he may be opening another fitting location in Orange county soon. That would make your drive a little shorter.

Don't know why so many are scared to get a fit.

A fit....a real fit....is just that. Correctly fitting you to your bicycle. There shouldn't be an "adjustment" period. The right fit is the right fit. It should feel correct from the get go. I don't think I've ever heard a reputable fitter say "Oh, don't worry, you're uncomfortable now but you'll get used to it"

If someone says that to you, they don't know what they're doing.

Now, having said that......if you're looking to change your fit based on eyeball aerodynamics and slam the bars to see "how it goes"...well then yeah, fuck around with that after the race.....but that's not a fit.

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I'm faster in Kilometers!
Wattie Ink Triathlon Team
Powered by Accelerate 3

well, someone has to ask.... what is the speed versus power? are we talking 20mph on 300W bad, or 22mph on 200W "bad"?

Try Dean Sprague in San Diego. http://www.pedpowerperformlab.com/Home.html

I've had two fits done so I can only compare them among each other.

Given my experience and the recommendations of others that led me to my second fit I would recommend Moment Bicycles at Liberty Station.

http://momentbicycles.com/

I couldn't agree more, but, if your current fit is complete shit you might come out the other side with a lot less power and not enough time to fix that. Comfortable, for sure. But powerful enough in time? Maybe. Maybe not. The OP said the comfort is currently there, I would rather chase the devil you know 4 weeks out.

Somewhere in between. Like 23 @ 250

Dave,

Go to Moment Bicycles and have them take you through the fit process on their dynamic fit bike. Then you can have your cake and eat it too....that is to say, you can have your perfect coordinates written down and compared - if they are drastically different you can do nothing or make moderate improvements and you can do a full tweak to perfect after.

http://momentbicycles.com/...ike-fitting-pg64.htm
619- 523-2453

Ian

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Ian Murray
http://www.TriathlonTrainingSeries.com
I like the pursuit of mastery
Twitter - @TriCoachIan

I got a brand new bike with a brand new fit three weeks before IMTX 2011. Rode the bike one time for 40 miles the week before the race.

It worked great.

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Favorite Gear: Dimond | Cadex | Desoto Sport | Hoka One One

if you were racing day after tomorrow, and a position change tomorrow would result in a more comfortable, more powerful position, i'd absolutely make that change.

moment cycle sport is your place.

or if you can wait until the 18th of june i think i'm going to have all my fit instructors up to the compound, about 2hr from rancho bernardo, for a weekend of fitting.

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Dan Empfield
aka Slowman

Exactly how it worked out for me.

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Favorite Gear: Dimond | Cadex | Desoto Sport | Hoka One One

Thanks Dan! Weekend of june 18 I will be trail running a long ridgeline in the mountains, but Moment is going to be the place. I figure I will hold off on the refit until after the july race. I have another 70.3 in august so the timing will work better that way

Perfectly stated. A good fitter is going to be able to gauge the risk of changing the fit this late in the game and advise accordingly.

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Trent Nix
Owned and operated Tri Shop
F.I.S.T. Advanced Certified Fitter | Retul Master Certified Fitter (back when those were things)

Fwiw, I have changed my bike fit for all 5 races this is year, usually the day before the race, and some of the changes have been really substantial. I have changed it against since my last race, and may not ride it outside before racing at Raleigh. The way I look at it is a constant refinement process. When I say major changes, I mean like changes bars from 17 degrees to 3, or from 165mm to 172.5mm cranks.

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Yeah. I got a new bike and a new FIST fit 3 weeks ahead of my 2nd ever IM and had a really good bike. 5:2x off something pathetic like 160w, totally worth it.

Never too late to become friends with your bike😊

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Robert Driskell
Certified Master Body Geometry fit Technician
Certified Master Retul Fit Technician
Zipp Service Course Specialist
Bikes Plus Pensacola Florida

As with all things it's a matter of degree.

Are you a 300w monster trying to get to 300+ or an average AG'er trying to get to 180w.
When did you buy the bike and how much did you weigh and what training have you done since.
Is the bike fit you have comfortable.

The only thing I wouldn't change right up to the day (but not usually in Transition) is the seat.

I find about 12-20 hours of riding in the new position is what it takes to adjust. Keep in mind
that this could fatigue different muscle groups that could affect the run.

I think trying to make direct comparisons to others is tricky. It would only really work if you all used exactly the same equipment and were the same height & weight.

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29 years and counting