Frame size, new bike fitting, questions

[davidalone]

it'd be better if you could say stack and reach measurements.

what stem size would you need on the small and on the medium and how many risers?

[kauphy]

I currently ride a Ridley Fenix size M (565 ETT, Stack 575, Reach 390, STA 73) with a 120mm stem.

I'm looking at getting a new bike but with a 73.5 STA and similar stack and reach. I want to get the CAAD SuperSix Evo but it looks like I'm in between 56 and 58 there. I'm thinking if I do decide to get it I'll go with the 56 and get a longer stem. The 58 may be a tad too long and it's STA is 73 (really want 73.5).

Do you guys have any recommendations for frames that are known to have steep STAs?

[steve long]

when you order the speedmax, canyon want these measurements and check you have ordered the right size frame/stem length/seat post length, but it sounds like a small with a medium/large seat post and a 85mm stem

[Bely]

Do they actually sell different lengths for the seatpost? I called them and apparently they don't? Can someone from Europe help me out please? Thank you! Thank you Frankie B for the topic edit!

[steve long]

here is a link to my mates twitter site, he rides a medium speedmax with a large seatpost https://twitter.com/No1Swann

[SkippyMcJimmelstein]

Seat tube angle (STA): Do small differences really matter as long as the saddle has enough fore/aft adjustment?

Ex: Let's say we have two bikes with a 73 and 73.5 STA and roughly the same everything else. If we adjust the saddles so that they have the same position relative to the BB will the riding position be virtually identical? I always had the (foolish?) notion that a steeper STA rotates the body forward to a more aerodynamic position regardless of saddle position compared to a slacker STA bike.

[efeballi]

Probably yes. If the stack and reach of two frames are the same, the difference in STA can be rectified by using a setback/straight seatpost and moving the saddle on the seatpost.


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[funtez]

Hi Folks, first post here so please be gentle.

I am looking to buy my second road bike, i sold my specialised tarmac sl4 a few months back when i needed some cash and am now looking to replace it.

I live in a fairly isolated island with no good local bike fitters and a very 'lacking' LBS. I bought the previous SL4 used online and enjoyed it a lot, very fast bike. I chose the sizing from my rough competitive cyclist 'fit guide' measurements and it seemed to work alright, i did spend quite some time playing with the seat height and setback which i found very interesting how little can make a big difference.

Anyhow I've decided to try something different(from the s-works) for now, and perhaps have a custom frame built sometime next year. I am 29 yo and around 180lbs, pretty flexible and don't mind a fairly aggressive bike position, mostly shorter rides upto ~100km.

I'm looking at a Cannonade Supersix Evo - I've done my best to size it off my CC fit guide and my previous bike but having a lot of trouble deciding as they have rather different geometry. I am tossing up between the Supersix evo size 58(which i have found cheap) or perhaps i need the size 60. The geo of the 58 is fairly similar to my sl4 except TT is slightly shorter and stack height slightly lower on the EVO. As i never had a professional fit on my SL4 I'm not exactly sure how good my position was but perhaps someone here can possibly help determine if the 58evo is going to be too small.

i have attached a link to the super six GEO, Tarmac GEO( i had a 58) my competitive cyclist fit guide and measurements and a side profile of my old bike.

many thanks in advance.

[funtez]

apologies, first post wouldn't allow my pictures - not exactly sure how i upload them so please bare with me...

https://www.dropbox.com/s/ejqxgysw11xts0y/IMG_4740.JPG?dl=0
https://www.dropbox.com/s/ajwvcwnjey0gppr/Screen%20Shot%202014-10-12%20at%205.46.21%20pm.png?dl=0
https://www.dropbox.com/s/kxbwaqezzk8cyfy/Screen%20Shot%202014-10-12%20at%205.47.09%20pm.png?dl=0
https://www.dropbox.com/s/l9r75ibndykpx7b/Screen%20Shot%202014-10-12%20at%205.47.47%20pm.png?dl=0

[WheresWaldo]

apologies, first post wouldn't allow my pictures - not exactly sure how i upload them so please bare with me...

https://www.dropbox.com/s/ejqxgysw11xts0y/IMG_4740.JPG?dl=0
https://www.dropbox.com/s/ajwvcwnjey0gppr/Screen%20Shot%202014-10-12%20at%205.46.21%20pm.png?dl=0
https://www.dropbox.com/s/kxbwaqezzk8cyfy/Screen%20Shot%202014-10-12%20at%205.47.09%20pm.png?dl=0
https://www.dropbox.com/s/l9r75ibndykpx7b/Screen%20Shot%202014-10-12%20at%205.47.47%20pm.png?dl=0

Funtez, hard to say but looking at how your Tarmac is set up I would first have to ask, are you comfortable on longer fast rides?

If yes, then dropping stack height will lower the handlebar position and shorten the reach to the handlebars. But looking at the measurements you provided, if they are precise and accurate, your REACH should be somewhere between 390-395mm based on Eddy Fit. That would put you in a 56 Tarmac or a 58 EVO. Please note that the fit calculator you used does not provide enough data to more accurately predict sizing.

[bungis]

I'm looking to order a Giant Propel (non-ISP) and would like help with sizing for a racing fit. I have decent flexibility and core strength, can touch the ground. Here's my retul data, wearing my road shoes with cleats:

Code: Select all

cm
Functional height:   178.92     
Suprasternal height:   149.75    
Chest scope (average):   96.39    
Chest height:   131.82    
Chest scope:   96.39    
Chest height (top):   131.41    
Chest scope (top):   97.34    
Chest height (bottom):   122.65   
Chest scope (bottom):   89.81   
Body scope:   82.39   
Pelvic bone height:   102.76   
Hip height:   95.98   
Hip scope:   51.30   
Arm length 1:   66.26   
Arm length 2:   57.65   
Fist height:   99.31   
WEP:   xx/96.39/82.39/51.30 [178.92][102.76][69.06]

My actual height barefoot is 182cm, inseam 82.5cm.

Thanks in advance.

http://www.giant-bicycles.com/en-us/bik ... /#geometry

edit: For clarification, this to select the size.

[Vallinotti]

Hi folks,

I have a Cannondale Evo 52 cm size, with a 110mm stem(-6°) and the stock spacer 25mm installed. My doubt is concerning the size of my new bike , a Canyon Aeroad CF SLX. I can not realized so much how the difference in 7mm in each stack and reach( EVO 526mm, 384mm ; Aeroad 533mm, 391mm) will outcome.
My initial throught is about the Aeroad in 53 size with a 110mm stem lenght.

Please, advice needed. Which size should I choose 53 or 50? 110mm stem lenght?

Regards

[Vallinotti]

[efeballi]

Valinotti, I think you'd be better off with the 53. You can lose the spacers and/or go with a stem with more drop. The reach difference may be tolerated with using a 100 mm stem, which is by no means short for a 53 cm frame IMO.
With the 50 you'd need a tower of spacers and a 130 mm stem which would look awkward and may throw the handling off.

My two cents.


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[Vallinotti]

thanks. I will go with the 53 size.