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Orange Yeti 575
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115 Posts
Discussion Starter · #1 ·
I've had a 575 (2008 XL) for two years and have had a blast on it.

In September I got an "over-use" type injury (bilateral patellar tendonitis) and I am trying to figure out if "over-use" is indeed the sole contributing factor. I definitely increased my mileage too suddenly and had too many major climb days in a row without rest. I've just started physical therapy which includes stretching and core training so am hopeful that will address it.

Nonetheless, having been off the bike for most of the last 90 days I have had time to think through all of the potentially contributing factors including bike fit.

I double checked my fit on all my bikes and I had the 575 saddle height and forward/aft position pretty close to the right place based on these guidelines. The plumb line test however is way off when I check knees in relation to the pedal axle (ball of my foot). With the pedals level the edge of my knee is about 2" forward of the pedal axle. I have the seat all the way back and I'm concerned that if I used a set-back seat post to get my knees in the right place it would move my weight so far back on the bike it would screw up the intended geometry and make climbing harder.

I recognize that these are sizing guidelines and not dogma but am curious how other tall folks in particular fit on their bikes. My inseam is 36", FWIW. Anyone have any experience with this? Has anyone else checked their 575 fit using guidelines like these? I've seen them in about five different books/Web sites so they seem fairly well accepted as a starting point.

I'm hoping to eliminate the possibility that the bike never really fit me well but that it only became a real problem when I increased my miles and climbing which puts additional stress on the knees.

Thanks in advance for your thoughts.
Dan
 

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The White Jeff W
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5,712 Posts
I'm 6' 2" & all legs. I ride a large with a set-back seatpost & don't have any issues with climbing. I've never done the plumb bob check but just eyeballing it looks like my knee lines up pretty close to the pedal axle.

I might suggest finding a cheapo set-back seatpost & try it. I got mine on ebay for $20 bucks.
 

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I'm 6'6" with a 36" inseam as well and ride an XL 575. I've had a fitting completed by my LBS and a friend that's a certified "fitter". Both have come to the same conclusion that my fit is good with no laid-back seatpost or any other "modifications". I had some knee issues earlier this season but those were fixed with some stretching. Obviously not tendinitis but also not due to fitment as I originally feared. Best of luck in your recovery.
 

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Funny that there can be so much differences in sizing and fitting with almost the same persons (as looked from the length and inseam).

I'm 6'4" and have a 35.5" inseam. I ride the large, outfitted with a 90mm stem and inline seatpost.. My knees and back are not the best on earth, but I never have big issues while riding.
 

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Orange Yeti 575
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115 Posts
Discussion Starter · #5 ·
Thanks for the feedback guys. It's good to know there are other tall riders without issues.

I didn't have any problems for a year and a half but I was mostly doing a ride a week for 2-3 hours with an occasional mid-week ride. This fall I added a few days during the week and was doing 5-9 hours in the saddle per week (graphed my ride time).

On average how many hours a week are you guys on your bikes during riding season?

In the mean time, I bought a setback seatpost on eBay and will resell it locally on Craig's List if it doesn't work for me.

Thanks again for the help and well wishes on recovering. I would have rather busted a bone. This soft tissue stuff is maddening in its uncertainty.
Dan
 

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Don't be hasty.
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525 Posts
Wicked DJ said:
Funny that there can be so much differences in sizing and fitting with almost the same persons (as looked from the length and inseam).

I'm 6'4" and have a 35.5" inseam. I ride the large, outfitted with a 90mm stem and inline seatpost.. My knees and back are not the best on earth, but I never have big issues while riding.
Indeed, I'm also 6'4" but have a 33" inseam.
 

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The White Jeff W
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5,712 Posts
Another thought, 180mm crank arms would move your foot forward a bit. Probably only a quarter to a half inch, though.
 

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Orange Yeti 575
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115 Posts
Discussion Starter · #8 ·
jeffw-13 said:
Another thought, 180mm crank arms would move your foot forward a bit. Probably only a quarter to a half inch, though.
That is another good idea, Jeff. Thanks for thinking this through. Do you know what size comes stock on the bike? From my tape measurer and rough calculation it looks like 175mm? Does that sound right?
 

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The White Jeff W
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Dan_AZ said:
Do you know what size comes stock on the bike? From my tape measurer and rough calculation it looks like 175mm?
I can't say for sure as I built mine up from a frame. Most likely 175, I would think.
 

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I'd say find a shop that has someone that's been trained to fit bikes. I'm tall like you and ride an XL 575 with no comfort issues and I've had patella problems on both knees. PT and a correct fit has made all the difference in the world for the knee issues.
 

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Orange Yeti 575
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115 Posts
Discussion Starter · #11 ·
joltz said:
I'd say find a shop that has someone that's been trained to fit bikes. I'm tall like you and ride an XL 575 with no comfort issues and I've had patella problems on both knees. PT and a correct fit has made all the difference in the world for the knee issues.
More good advice. I just finished my first week of PT. I think I'll do the bike fit next week. The more I learn about it the more I realize it would be a good idea. I've been off the bike for going on four months! A bike fit is a small price to pay compared to PT with my crappy insurance. Thanks for the help.
 

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Ride a Yeti, Duh.
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Honestly go get a fit when you can. You can adjust all you want..but usually can make things worse..when you don't really know what is right for you.

Last year i had a Retul fit. Right off the bat i noticed a difference. I thought my seat was to low..it was to high. My stem was to long and my seat was all sorts bad.i gained more power, a better and round pedal stroke, and i was comfortable, and in the end, my race times WERE faster. It's usually not cheap, but none the less worth it.
 

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Orange Yeti 575
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115 Posts
Discussion Starter · #13 ·
ImaYeti said:
Honestly go get a fit when you can. You can adjust all you want..but usually can make things worse..when you don't really know what is right for you.

Last year i had a Retul fit. Right off the bat i noticed a difference. I thought my seat was to low..it was to high. My stem was to long and my seat was all sorts bad.i gained more power, a better and round pedal stroke, and i was comfortable, and in the end, my race times WERE faster. It's usually not cheap, but none the less worth it.
I'm with you. I've got a fit scheduled for 1:00pm tomorrow. I've messed around with trying to do it myself to know that it is something I need help with.

As for cost...one visit to my primary care, one visit to a knee specialist, and one week of PT costs far more (and counting) than the $180 for a high end 3D Specialized Body Geometry Fit at the LBS. I should have started there. Lesson learned. :(

On the bright side I'll post up what finally resolves it for me so hopefully someone else can learn from my experience!
 
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