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  #1  
Old 08-27-2018, 06:34 PM
hotspur.serotta hotspur.serotta is offline
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Bike fitting calculator

I filled in my dimensions on the Bike Fit Calculator here.

The results, along with the dimensions of my Serotta and Tempo, are seen in the attached file. I conclude, reluctantly, that the Serotta is too big for me. A number of factors led me to that: trying shorter handlebars and stem, having a fitting at my LBS, observations by an experienced cyclist who watched me ride, and listening to my body. The BFC just confirmed those data points.

I'm interested in a French Fit, for fitness/recreational cycling, looking for about a 61 cm effective top tube c-c and 62 seat tube c-c. Measuring half a dozen bikes (by no means random nor representative) indicates that finding both dimensions in the same bike will be a challenge.

Any recommendations as to brands of road bikes to look at - or brands to stay away from - as being more likely to fill the bill?

I'm partial to steel frames c. 1985 to 2010, would prefer brifters, but DT index shifters OK. Not opposed to Ti or Cf but not interested in Al. Suggestions?
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  #2  
Old 09-08-2018, 06:53 AM
owly owly is offline
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In a production frame I can only think of the carbon Alan Mito, size 13 in standard (not the semi-sloping) geometry.

This one is a tad smaller, but may?? work:-
https://www.ebay.com/itm/Alan-Carbon...-/222974970565

Last edited by owly; 09-08-2018 at 07:05 AM. Reason: txt
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  #3  
Old 08-31-2019, 06:52 PM
rigged rigged is offline
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Hi, Wondering if anyone can offer feedback on bike fit please. I put my measurements into bike fit calculator at competitive cyclist and it recommended a 55cm top tube and 60cm seat tube. I am only 5'11 in height and find that roughly saddle to peddle height of 98 cm feels comfortable. My question is, does frame height really matter? Could I ride a 55cm by 55cm frame so long as I can get proper extension on the saddle? Of course the distance between saddle to bars is a consideration. Any feedback is appreciated.

Last edited by rigged; 08-31-2019 at 07:01 PM.
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  #4  
Old 08-31-2019, 10:48 PM
ultraman6970 ultraman6970 is offline
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Hi, 5.11 and you have a saddle height of 98???

Using the lemond formula with a saddle height of 98 you should have like 110 cm inseam...?????????

I would advice you to measure yourself your inseam... then look for lemond saddle height formula, put the numbers in the formula. There's lemond frame tables that IMO dont work ok? put your inseam in the formula and see what you get.

Wont be perfect but will be ball park... +-5 to 10 mm off depending on the riding style.

Seen people riding high all their life too... next question... do you have a picture of your ride???
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  #5  
Old 08-31-2019, 10:55 PM
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fa63 fa63 is offline
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Quote:
Originally Posted by rigged View Post
Hi, Wondering if anyone can offer feedback on bike fit please. I put my measurements into bike fit calculator at competitive cyclist and it recommended a 55cm top tube and 60cm seat tube. I am only 5'11 in height and find that roughly saddle to peddle height of 98 cm feels comfortable. My question is, does frame height really matter? Could I ride a 55cm by 55cm frame so long as I can get proper extension on the saddle? Of course the distance between saddle to bars is a consideration. Any feedback is appreciated.
If you meant a saddle height of 78 cm (and not 98 cm), then you likely are of the longer legs/shorter torso variety (55 cm top tube suggestion would also indicate that).

That said, don't shop by seat tube measurement; that is archaic in the age of compact frames. You will probably want something with an "endurance geometry" (meaning shorter top tube and taller head tube) so that you get the reach you need without a massive saddle to bar drop.

Good luck.
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  #6  
Old 09-01-2019, 02:35 AM
ultraman6970 ultraman6970 is offline
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Have to agree, if 78 then he is kind'a ok with a 55 or a 56 frame, back in the day he would had been put maybe even in a 57....
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  #7  
Old 09-01-2019, 08:10 AM
rigged rigged is offline
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Quote:
Originally Posted by ultraman6970 View Post
Hi, 5.11 and you have a saddle height of 98???

Using the lemond formula with a saddle height of 98 you should have like 110 cm inseam...?????????

I would advice you to measure yourself your inseam... then look for lemond saddle height formula, put the numbers in the formula. There's lemond frame tables that IMO dont work ok? put your inseam in the formula and see what you get.

Wont be perfect but will be ball park... +-5 to 10 mm off depending on the riding style.

Seen people riding high all their life too... next question... do you have a picture of your ride???
Well, this may tend to the freakish side, but I have an inseam of 93 cm with thigh and lower leg measurements of 63cm and 60 cm respectively. So bike fit puts me on a 60cm seat tube and 55cm top tube. Do I split the difference and ride a 58? I am currently on a 56 with a fair bit of seat post extension which may be good for flex but puts the seat well above the bars.

Last edited by rigged; 09-01-2019 at 08:24 AM.
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  #8  
Old 09-01-2019, 08:28 AM
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fa63 fa63 is offline
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Quote:
Originally Posted by rigged View Post
Well, this may tend to the freakish side, but I have an inseam of 93 cm with thigh and lower leg measurements of 63cm and 60 cm respectively. So bike fit puts me on a 60cm seat tube and 55cm top tube. Do I split the difference and ride a 58? I am currently on a 56 with a fair bit of seat post extension which may be good for flex but puts the seat well above the bars.
That is certainly on the long side, but still, your saddle height should be closer to 80-81 cm with that inseam, not 98. The only way 98 cm would make sense is if it includes the crank arm length as well (i.e., the measurement is from top of saddle to the pedal spindle).
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Old 09-01-2019, 08:31 AM
rigged rigged is offline
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Quote:
Originally Posted by fa63 View Post
That is certainly on the long side, but still, your saddle height should be closer to 80-81 cm with that inseam, not 98. The only way 98 cm would make sense is if it includes the crank arm length as well (i.e., the measurement is from top of saddle to the pedal spindle).
Yes, clarification here: top of saddle to top of pedal is the saddle height that I am quoting. That is roughly 98 cm. Incidentally, the bike fit calculator puts BB to saddle at roughly 88 cm.

Top Tube Length 55.7 - 56.1 Cm
Seat Tube Range CC 60.2 - 60.8 Cm
Seat Tube Range CT 62.1 - 62.6 Cm
Stem Length 11.6 - 12.2 Cm
BB Saddle Position 86.9 - 88.9 Cm
Saddle Handlebar 55.2 - 55.8 Cm
Saddle Setback 6.7 - 7.1 Cm

Last edited by rigged; 09-01-2019 at 08:35 AM.
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  #10  
Old 09-01-2019, 08:56 AM
ultraman6970 ultraman6970 is offline
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Ok.. he is including the crank in the calculation, thats another way to do it.

Personally like center BB to Top of the Saddle and if we use the lemond formula then you end up with ...93*0.883=83 that is in the high side IMO just like FA63 said.

Do you have a picture of your actual bike?
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  #11  
Old 09-01-2019, 09:10 AM
rigged rigged is offline
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Here is a photo of the current setup. Bike is a 56.
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  #12  
Old 09-01-2019, 10:58 AM
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fa63 fa63 is offline
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I would say you are a ideal candidate for a custom geometry bike :-) If that is not an option, look at endurance geometry frames (Giant Defy, Trek Domane H2, etc.) so you can get a taller head tube. Otherwise, you will end up with a huge stack of spacers like you currently have.

Last edited by fa63; 09-01-2019 at 11:35 AM.
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  #13  
Old 09-01-2019, 11:19 AM
everbeek everbeek is offline
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[QUOTE=rigged;2587903]Yes, clarification here: top of saddle to top of pedal is the saddle height that I am quoting. That is roughly 98 cm. Incidentally, the bike fit calculator puts BB to saddle at roughly 88 cm.

You have a 100 mm crank length?
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  #14  
Old 09-01-2019, 12:04 PM
rigged rigged is offline
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Quote:
Originally Posted by fa63 View Post
I would say you are a ideal candidate for a custom geometry bike :-) If that is not an option, look at endurance geometry frames (Giant Defy, Trek Domane H2, etc.) so you can get a taller head tube. Otherwise, you will end up with a huge stack of spacers like you currently have.
Thanks fa63, custom geometry might be the only way to get a solid fit. I'll check out endurance geometry as well.
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  #15  
Old 09-01-2019, 12:06 PM
rigged rigged is offline
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[QUOTE=everbeek;2587963]
Quote:
Originally Posted by rigged View Post
Yes, clarification here: top of saddle to top of pedal is the saddle height that I am quoting. That is roughly 98 cm. Incidentally, the bike fit calculator puts BB to saddle at roughly 88 cm.

You have a 100 mm crank length?
No, crank is probably 172.5. Bike fit calculator pegs BB to saddle at 88 cm. Not sure what the actual is on the tarmac.
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